- pruddeni, Dactylioceras pruddeni Guex 1971 † - (DACTYLIOCERATIDAE) (FOSSIL)
- prudentia, Flemingostrea prudentia (Stanton 1893) † - (OSTREIDAE) (FOSSIL)
- prudentia, Flemingostrea prudentia (White, 1877 †) - (OSTREIDAE) (FOSSIL)
- prudhoensis, Xanthomelon prudhoensis E.A. Smith, 1894 - (CAMAENIDAE)
- pruina, Retidrillia pruina (R.B. Watson, 1881) - (BORSONIIDAE)
- pruina, Drilliola pruina (R.B. Watson, 1881) - syn of: Retidrillia pruina (R.B. Watson, 1881) - (BORSONIIDAE)
- pruina, Pleurotoma pruina R.B. Watson, 1881 - syn of: Retidrillia pruina (R.B. Watson, 1881) - (TURRIDAE)
- pruininus, Cantharidus pruininus A.A. Gould, 1849 - syn of: Cantharidus capillaceus (R.A. Philippi, 1849) - (TROCHIDAE)
- pruininus minor, Cantharidus pruininus minor E.A. Smith, 1902 - syn of: Cantharidus capillaceus (R.A. Philippi, 1849) - (TROCHIDAE)
- pruininus perobtusus, Cantharidus pruininus perobtusus H.A. Pilsbry, 1889 - syn of: Cantharidus capillaceus (R.A. Philippi, 1849) - (TROCHIDAE)
- pruinoides, Rhipidodonta pruinoides L.R.L. Simone, 2006 - syn of: Rhipidodonta funebralis (I. Lea, 1834) - (HYRIIDAE)
- pruinosa, Ancilla pruinosa F. Boyer, 2015 - (ANCILLARIIDAE)
- pruinosa, Margarella pruinosa (A. de Rochebrune & J.F. Mabille, 1885) - (CALLIOSTOMATIDAE)
- pruinosa, Alopia pruinosa J.G.F. de Charpentier, 1852 - syn of: Alopia lischkeana (J.G.F. de Charpentier, 1852) - (CLAUSILIIDAE)
- pruinosa, Lepidotrichia pruinosa (O.F. von Möllendorff, 1890) - (HELICARIONIDAE)
- pruinosa, Laona pruinosa (W. Clark, 1827) - (LAONIDAE)
- pruinosa, Granulina pruinosa F. Boyer, 2003 - (MARGINELLIDAE)
- pruinosa, Marginella pruinosa R.B. Hinds, 1844 - syn of: Prunum pruinosum (R.B. Hinds, 1844) - (MARGINELLIDAE)
- pruinosa, Mitra pruinosa L.A. Reeve, 1844 - syn of: Neocancilla hebes (L.A. Reeve, 1845) - (MITRIDAE)
- pruinosa, Philine pruinosa W. Clark, 1827 - syn of: Laona pruinosa (W. Clark, 1827) - (PHILINIDAE)
- pruinosa, Odostomia pruinosa A. Adams, 1860 - (PYRAMIDELLIDAE)
- pruinosa, Raphitoma pruinosa (P.M. Pallary, 1906) - (RAPHITOMIDAE)
- pruinosa, Granigyra pruinosa (J.G. Jeffreys, 1883) - (SEGUENZIOIDEA (UNASSIGNED))
- pruinosa, Bruceiella pruinosa B.A. Marshall, 1994 - (SKENEIDAE)
- pruinosa, Dikoleps pruinosa (G.W. Chaster, 1896) - (SKENEIDAE)
- pruinosa, Graphis pruinosa S. Gofas & A. Rueda, 2014 - (TOFANELLIDAE)
- pruinosa, Nesocoptis pruinosa (P.M.A. Morelet, 1849) - (UROCOPTIDAE)
- pruinosa bibijaguaensis, Nesocoptis pruinosa bibijaguaensis (C. de la Torre & P. Bartsch, 1972) - (UROCOPTIDAE)
- pruinosa bibijaguensis, Nesocoptis pruinosa bibijaguensis C. de la Torre & P. Bartsch, 1972 - (UROCOPTIDAE)
- pruinosa caballoensis, Nesocoptis pruinosa caballoensis C. de la Torre & P. Bartsch, 1972 - (UROCOPTIDAE)
- pruinosa casasensis, Nesocoptis pruinosa casasensis C. de la Torre & P. Bartsch, 1972 - (UROCOPTIDAE)
- pruinosa charpentieri, Alopia pruinosa charpentieri Konijsteir, 1927 - syn of: Alopia lischkeana (J.G.F. de Charpentier, 1852) - (CLAUSILIIDAE)
- pruinosa dilatata, Philine pruinosa dilatata J.G. Jeffreys, 1867 - syn of: Laona pruinosa (W. Clark, 1827) - (PHILINIDAE)
- pruinosum, Herpetopoma pruinosum (B.A. Marshall, 1979) - (CHILODONTIDAE)
- pruinosum, Onithochiton pruinosum A. de Rochebrune, 1884 - (CHITONIDAE)
- pruinosum, Prunum pruinosum (R.B. Hinds, 1844) - (MARGINELLIDAE)
- pruinosum, Opeas pruinosum O.F. von Möllendorff, 1900 - (SUBULINIDAE)
- pruinosus, Lissoacme pruinosus (G.B. I Sowerby, 1833) - (BULIMULIDAE)
- pruinosus, Plectodon pruinosus B.A. Marshall, 2002 - (CUSPIDARIIDAE)
- pruinosus, Cyclotus pruinosus E.C. Von Martens, 1863 - (CYCLOPHORIDAE)
- pruinosus, Ischnochiton pruinosus (A.A. Gould, 1846) - (ISCHNOCHITONIDAE)
- pruinosus, Helcion pruinosus (C.F.F. von Krauss, 1848) - (PATELLIDAE)
- pruinosus, Cantharidus pruinosus A.A. Gould, 1844 - syn of: Cantharidus capillaceus (R.A. Philippi, 1849) - (TROCHIDAE)
- pruinosus, Unio pruinosus A. Schmidt, 1840 - syn of: Unio crassus L. Philipsson in A. Retzius, 1788 - (UNIONIDAE)
- pruinosus fuscoradiatus, Helcion pruinosus fuscoradiatus W. Turton - (PATELLIDAE)
- prumiense, Ponticeras prumiense (Steininger, 1853 †) - (PONTICERATIDAE) (FOSSIL)
- prumiense platystoma, Prochorites prumiense platystoma Clausen, 1969 † - syn of: Ponticeras platystoma Clausen, 1969 † - (ACANTHOCLYMENIIDAE) (FOSSIL)
- prumiensis, Goniatites prumiensis Steininger, 1853 † - syn of: Ponticeras prumiense (Steininger, 1853 †) - (GONIATITIDAE) (FOSSIL)
- pruna, Goniobranchus pruna (T.M. Gosliner, 1994) - (CHROMODORIDIDAE)
- pruna, Chromodoris pruna T.M. Gosliner, 1994 - syn of: Goniobranchus pruna (T.M. Gosliner, 1994) - (CHROMODORIDIDAE)
- pruna, Erycina pruna L.C. Glenn, 1904 † - (LASAEIDAE) (FOSSIL)
- prunella, Pomacea prunella L.H. Hupé, 1857 - (AMPULLARIIDAE)
- prunelli, Kalidos prunelli E. Fischer-Piette, Ch.P. Blanc, F. Blanc & F. Salvat, 1994 - (ARIOPHANTIDAE)
- prunensis, Agriopoma prunensis L.C. Glenn, 1904 † - (VENERIDAE) (FOSSIL)
- prunicola, Turrifulgur prunicola E.J. Petuch, 1993 † - (BUSYCONIDAE) (FOSSIL)
- prunicola, Marianarona prunicola (Martin, 1904 †) - (CANCELLARIIDAE) (FOSSIL)
- prunicola, Opalia prunicola Martin, 1904 † - (EPITONIIDAE) (FOSSIL)
- prunicola, Ecphora prunicola E.J. Petuch, 1988 † - (MURICIDAE) (FOSSIL)
- prunicola, Nucula prunicola W.H. Dall, 1898 † - (NUCULIDAE) (FOSSIL)
- prunicolor, Anoma prunicolor E. Chitty, 1853 - (UROCOPTIDAE)
- Prunini, syn of: Genus Balanetta F.P. Jousseaume, 1875 (MARGINELLIDAE)
- pruninus, Napaeus pruninus (A.A. Gould, 1848) - (ENIDAE)
- pruninus, Cantharidus pruninus A.A. Gould, 1849 - syn of: Cantharidus capillaceus (R.A. Philippi, 1849) - (TROCHIDAE)
- pruninus, Trochus pruninus A.A. Gould, 1849 - syn of: Cantharidus capillaceus (R.A. Philippi, 1849) - (TROCHIDAE)
- pruninus minor, Cantharidus pruninus minor E.A. Smith, 1902 - syn of: Cantharidus capillaceus (R.A. Philippi, 1849) - (TROCHIDAE)
- pruninus perobtusa, Cantharidus pruninus perobtusa H.A. Pilsbry, 1889 - syn of: Cantharidus capillaceus (R.A. Philippi, 1849) - (TROCHIDAE)
- prunoides, Unio prunoides I. Lea, 1868 - syn of: Rhipidodonta funebralis (I. Lea, 1834) - (UNIONIDAE)
- prunulum, Pomacea prunulum L.A. Reeve - syn of: Pomacea glauca (C. Linnaeus, 1758) - (AMPULLARIIDAE)
- prunulum, Paradrillia inconstans prunulum (J.C. Melvill & R. Standen, 1901) - (HORAICLAVIDAE)
- prunum, Conocardium prunum Barrande, 1881 † - (CONOCARDIIDAE) (FOSSIL)
- prunum, Cypraea prunum Sowerby, 1839 † - (CYPRAEIDAE) (FOSSIL)
- prunum, Helix prunum (A.E.J. Férussac, 1821) - (HELICIDAE)
- prunum, Helicogena prunum A.E.J. Férussac, 1821 - syn of: Helix prunum (A.E.J. Férussac, 1821) - (HELICIDAE)
- prunum, Helix prunum L.A. Reeve, 1852 - syn of: Parglogenia pelodes (L. Pfeiffer, 1846) - (HELICIDAE)
- Prunum, Genus Prunum Herrmannsen, 1852 (MARGINELLIDAE)
- prunum, Prunum prunum (J.F. Gmelin, 1791) - (MARGINELLIDAE)
- prunum, Gregoia prunum Fehse, 2017 - (TRIVIIDAE)
- prunum, Voluta prunum J.F. Gmelin, 1791 - syn of: Prunum prunum (J.F. Gmelin, 1791) - (VOLUTIDAE)
- prunus, Joculator prunus A. Cecalupo & I. Perugia, 2013 - (CERITHIOPSIDAE)
- prunus, Erronea prunus P.F. Röding, 1798 - syn of: Erronea onyx (C. Linnaeus, 1758) - (CYPRAEIDAE)
- prunus, Parvilucina prunus W.H. Dall, 1903 † - (LUCINIDAE) (FOSSIL)
- prusiae, Nicomedites prusiae F. Toula, 1896 † - syn of: Nicomedites barbarossae F. Toula, 1896 † - (BEYRICHITIDAE) (FOSSIL)
- prusii, Unio prusii J.R. Bourguignat, 1856 - syn of: Unio crassus L. Philipsson in A. Retzius, 1788 - (UNIONIDAE)
- prutulensis, Valvata prutulensis (Gozhik in Gozhik & Datsenko, 2007 †) - (VALVATIDAE) (FOSSIL)
- prutulensis, Viviparus prutulensis (Datsenko, 2002 †) - (VIVIPARIDAE) (FOSSIL)
- pruvosti, Acrioceras pruvosti Sarkar, 1955 † - (ANCYLOCERATIDAE) (FOSSIL)
- pruvosti, Dermomurex pruvosti B. Garrigues & D. Merle, 2014 - (MURICIDAE)
- pruvosti, Bouryia pruvosti J. Le Renard, 1997 † - (POMATIOPSIDAE) (FOSSIL)
- pruvotae, Polycera pruvotae J.J. Risbec, 1953 - (POLYCERIDAE)
- Pruvotaplysia, Subgenus Aplysia (Pruvotaplysia) H. Engel, 1936 (APLYSIIDAE)
- Pruvotaplysia, syn of: Genus Aplysia C. Linnaeus, 1767 (APLYSIIDAE)
- Pruvotella, Genus Pruvotella A. Pruvot-Fol, 1932 (CLIOPSIDAE)
- pruvotfolae, Aegires pruvotfolae S.J. Fahey & T.M. Gosliner, 2004 - (AEGIRIDAE)
- pruvotfolae, Elysia pruvotfolae Er. Marcus, 1957 - syn of: Elysia crispata O.A.L. Mörch, 1863 - (PLAKOBRANCHIDAE)
- Pruvotfolia, Genus Pruvotfolia J.P. Tardy, 1969 (FACELINIDAE)
- pruvoti, Pararrhopalia pruvoti H.R. Simroth, 1893 - (PRUVOTINIDAE)
- Pruvotia, Genus Pruvotia K.H.J. Thiele, 1894 (RHOPALOMENIIDAE)
- Pruvotina, Genus Pruvotina T.D.A. Cockerell, 1903 (PRUVOTINIDAE)
- PRUVOTINIDAE Heath, 1911 - Family (SOLENOGASTRES-SOLENOGASTRES [Subclass]-CAVIBELONIA [Order])
- prydzensis, Pareledone prydzensis C.C. Lu & T.N. Stranks, 1994 - (OCTOPODIDAE)
- Prymnbriareus, Genus Prymnbriareus G.A. Solem, 1981 (CAMAENIDAE)
- prynadai, Euflemingites prynadai Kiparisova, 1947 † - (FLEMINGITIDAE) (FOSSIL)
- prysjazhnjuki, Esperiana prysjazhnjuki (Gozhik in Gozhik & Datsenko, 2007 †) - (MELANOPSIDAE) (FOSSIL)
- prysjazhnjuki, Galizgia prysjazhnjuki V.V. Anistratenko in V.V. Anistratenko & al., 1991 † - (VIVIPARIDAE) (FOSSIL)
- prysmaticum, Buccinum prysmaticum G.B. Brocchi, 1814 - syn of: Nassarius kooli - (BUCCINIDAE)
- prysmaticus, Nassarius prysmaticus G.B. Brocchi, 1814 † - (NASSARIIDAE) (FOSSIL)
- Prysodon, syn of: Genus Prisodon H.C.F. Schumacher, 1817 (HYRIIDAE)
- prystophora, Myrtea prystophora W.H. Dall & C.T. Simpson, 1901 - syn of: Myrtina pristiphora (W.H. Dall & C.T. Simpson, 1901) - (LUCINIDAE)
- prytanis, Conus prytanis G.B. I Sowerby, 1882 - syn of: Lividoconus diadema (G.B. I Sowerby, 1834) - (CONIDAE)
- przevalskii, Buliminus przevalskii C.M.F. Ancey, 1886 - syn of: Pseudonapaeus albiplicatus (E.C. Von Martens, 1874) - (ENIDAE)
- przevalskii, Pyramidula przevalskii W.A. Lindholm, 1922 - syn of: Pyramidula rupestris (J.P.R. Draparnaud, 1801) - (PYRAMIDULIDAE)
- Psadara, Genus Psadara K. Miller, 1878 (PLEURODONTIDAE)
- Psadariella, syn of: Genus Psadara K. Miller, 1878 (PLEURODONTIDAE)
- psalterium, Cythara psalterium J.C. Melvill & R. Standen, 1896 - syn of: Eucithara coronata (R.B. Hinds, 1843) - (MANGELIIDAE)
- psaltes, Lepidochitona psaltes S.S. Berry, 1963 - syn of: Mopalia psaltes (S.S. Berry, 1963) - (LEPIDOCHITONIDAE)
- psaltes, Mopalia psaltes (S.S. Berry, 1963) - (MOPALIIDAE)
- psamatheis, Anomia psamatheis J.F. Bayan, 1873 † - (ANOMIIDAE) (FOSSIL)
- Psammacoma, Genus Psammacoma Dall, 1900 (TELLINIDAE) (FOSSIL)
- Psammacoma, syn of: Genus Macoma W.E. Leach, 1819 (TELLINIDAE)
- psammactinus, Unio psammactinus R.A. Philippi, 1848 - syn of: Diplodon granosus (J.G. Bruguière, 1792) - (UNIONIDAE)
- psammactinus, Unio psammactinus H.F.A. von Ihering, 1893 - syn of: Diplodon expansus (H.C. Küster, 1853) - (UNIONIDAE)
- psammaticus, Unio psammaticus I. Lea, 1852 - syn of: Diplodon granosus (J.G. Bruguière, 1792) - (UNIONIDAE)
- psamminum, Catulloceras psamminum Buckman † - (HILDOCERATIDAE) (FOSSIL)
- psammita, Anodonta psammita J.R. Bourguignat, 1862 - syn of: Anodonta cygnea (C. Linnaeus, 1758) - (UNIONIDAE)
- psammitica, Costabieta psammitica (A. Issel, 1869) - (PYRAMIDELLIDAE)
- Psammobella, Subgenus Gari (Psammobella) J.E. Gray, 1851 (PSAMMOBIIDAE)
- Psammobia, Subgenus Gari (Psammobia) Lamarck, 1818 (PSAMMOBIIDAE)
- Psammobia, syn of: Genus Gari H.C.F. Schumacher, 1817 (PSAMMOBIIDAE)
- PSAMMOBIIDAE Fleming, 1828 - Family (BIVALVIA-HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-TELLINOIDEA [Superfamily])
- psammobionta, Helminthope psammobionta L. Salvini-Plawén, 1991 - (RHODOPIDAE)
- psammobionta, Biserramenia psammobionta L. Salvini-Plawén, 1967 - (SIMROTHIELLIDAE)
- Psammocola, syn of: Genus Asaphis Modeer, 1793 (PSAMMOBIIDAE)
- Psammoconcha, Genus Psammoconcha (BIVALVIA INCERTAE SEDIS) (FOSSIL)
- Psammodonax, Subgenus Gari (Psammodonax) A.E.M. Cossmann, 1886 (PSAMMOBIIDAE) (FOSSIL)
- Psammodoris, syn of: Genus Loy A.V. Martynov, 1994 (CORAMBIDAE)
- Psammodulus, Genus Psammodulus Collins, 1934 (MODULIDAE) (FOSSIL)
- psammoica, Castalia psammoica (A.V.M.D. D'Orbigny, 1835) - (HYRIIDAE)
- Psammoica, Subgenus Gari (Psammoica) W.H. Dall, 1900 (PSAMMOBIIDAE)
- Psammophila, Subgenus Lutraria (Psammophila) T. Brown, 1827 (MACTRIDAE)
- psammophora, Leptaxis psammophora (R.T. Lowe, 1852) - (HYGROMIIDAE)
- Psammosolen, syn of: Genus Solecurtus H.M.D. De Blainville, 1824 (SOLECURTIDAE)
- Psammosphaerica, Subgenus Sanguinolaria (Psammosphaerica) F.P. Jousseaume, 1894 (PSAMMOBIIDAE)
- psammosphaerita, Psammosphaerica psammosphaerita F.P. Jousseaume, 1894 - (PSAMMOBIIDAE)
- Psammosphaerita, syn of: Subgenus Sanguinolaria (Psammosphaerica) F.P. Jousseaume, 1894 (PSAMMOBIIDAE)
- Psammostoma, Genus Psammostoma Vermeij & Snyder, 2002 (FASCIOLARIIDAE) (FOSSIL)
- Psammotaea, syn of: Genus Soletellina Blainville, 1824 [sunset shell] (PSAMMOBIIDAE) (FOSSIL)
- Psammotaea, syn of: Genus Gari H.C.F. Schumacher, 1817 (PSAMMOBIIDAE)
- psammotaea, Orthoyoldia psammotaea W.H. Dall, 1898 † - (YOLDIIDAE) (FOSSIL)
- psammotaea vivianensis, Orthoyoldia psammotaea vivianensis (G.F. Harris, 1919 †) - (YOLDIIDAE) (FOSSIL)
- Psammotaena, Subgenus Gari (Psammotaena) W.H. Dall, 1900 (PSAMMOBIIDAE)
- psammotella, Glauconome psammotella G.P. Deshayes, 1853 - (GLAUCONOMIDAE)
- Psammotella, Genus Psammotella Herrmannsen, 1852 (PSAMMOBIIDAE)
- psammotella, Tellina psammotella J.B.P.A. Lamarck, 1818 - (TELLINIDAE)
- Psammotellina, syn of: Genus Sanguinolaria J.B.P.A. Lamarck, 1799 (PSAMMOBIIDAE)
- Psammotellina, syn of: Genus Sanguinolaria J.B.P.A. Lamarck, 1799 (PSAMMOBIIDAE)
- Psammothalia, syn of: Subgenus Macoma (Temnoconcha) W.H. Dall, 1921 (TELLINIDAE)
- Psammotreta, Genus Psammotreta W.H. Dall, 1900 (TELLINIDAE)
- Psamosolen, Genus Psamosolen Risso, 1826 (SOLENIDAE) (FOSSIL)
- psara, Xerotricha psara J.R. Bourguignat, 1864 - syn of: Xerotricha conspurcata (J.P.R. Draparnaud, 1801) - (HYGROMIIDAE)
- psarocephalum, Dendropoma psarocephalum J.A. Hadfield & E.A. Kay in J.A. Hadfield & al., 1972 - (VERMETIDAE)
- psarolena, Chondrina psarolena J.R. Bourguignat, 1859 - (CHONDRINIDAE)
- psaropsis, Xerotricha psaropsis É.A.A. Locard, 1882 - syn of: Xerotricha conspurcata (J.P.R. Draparnaud, 1801) - (HYGROMIIDAE)
- Psarostola, Genus Psarostola H.A. Rehder, 1943 (COLUMBELLIDAE)
- psarus, Pecten psarus J.C. Melvill, 1888 - syn of: Volachlamys singaporina (G.B. II Sowerby, 1842) - (PECTINIDAE)
- Psathura, Genus Psathura G.P. Deshayes, 1858 (VENERIDAE) (FOSSIL)
- psathyra, Hemicycla psathyra R.T. Lowe, 1861 - (HELICIDAE)
- psathyra bituminosa, Hemicycla psathyra bituminosa (J.F. Mabille, 1883) - (HELICIDAE)
- psathyra temperata, Hemicycla psathyra temperata (A. Mousson, 1872) - (HELICIDAE)
- psathyrolena, Hypnophila psathyrolena (J.R. Bourguignat, 1858) - (COCHLICOPIDAE)
- psaturochaeta, Monacha psaturochaeta J.R. Bourguignat, 1860 - syn of: Monacha granulata (J. Alder, 1830) - (HYGROMIIDAE)
- pschechense, Audouliceras renauxianum pschechense (Egoian, 1977 †) - (ANCYLOCERATIDAE) (FOSSIL)
- psectra, Stalactella psectra F.G. Thompson & E.L. Mihalcik, 2005 - (EPIROBIIDAE)
- pselia, Drillia pselia K.H. Barnard, 1958 - (DRILLIIDAE)
- Pselioceras, Genus Pselioceras Hyatt, 1884 (GRYPOCERATIDAE) (FOSSIL)
- Pselliogyra, syn of: Genus Parthenina M.E.J. Bucquoy, P. Dautzenberg & G.F. Dollfus, 1883 (PYRAMIDELLIDAE)
- pselliotes, Pruvotfolia pselliotes (A. Labbé, 1923) - (FACELINIDAE)
- Psephaea, Subgenus Fulgoraria (Psephaea) J.C.H. Crosse, 1871 (VOLUTIDAE)
- Psephidia, syn of: Genus Nutricola F.R. Bernard, 1982 (VENERIDAE)
- psephos, Amphidromus psephos J.J. Vermeulen, T.S. Liew & M. Schilthuizen, 2015 - (CAMAENIDAE)
- Pseuamussium, syn of: Genus Pseudamussium O.A.L. Mφrch, 1853 (PECTINIDAE)
- Pseudacanthoceras, Subgenus Acanthoceras (Pseudacanthoceras) Adkins, 1928 (ACANTHOCERATIDAE) (FOSSIL)
- Pseudacesta, Genus Pseudacesta Waagen, 1907 (LIMIDAE) (FOSSIL)
- Pseudacharax, syn of: Genus Solemya J.B.P.A. Lamarck, 1818 (SOLEMYIDAE)
- Pseudachatina, Genus Pseudachatina J.A. Albers, 1850 (ACHATINIDAE)
- Pseudacompsoceras, Genus Pseudacompsoceras Spath, 1925 (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- Pseudacrochordiceras, Genus Pseudacrochordiceras Tozer , 1994 (ACROCHORDICERATIDAE) (FOSSIL)
- Pseudacteon, Genus Pseudacteon K.H.J. Thiele, 1925 (ACTEONIDAE)
- Pseudactinoceras, Genus Pseudactinoceras Schindewolf, 1943 (PSEUDORTHOCERATIDAE) (FOSSIL)
- pseudaculus, Metaphaedusa pseudaculus H. Nordsieck, 2001 - (CLAUSILIIDAE)
- pseudacuta, Carbonicola pseudacuta Trueman & Weir, 1948 † - (ANTHRACOSIIDAE) (FOSSIL)
- Pseudaetomoceras, Genus Pseudaetomoceras Cocchi, 1882 (ARIETITIDAE) (FOSSIL)
- Pseudaganides, Genus Pseudaganides Spath, 1927 (PSEUDONAUTILIDAE) (FOSSIL)
- Pseudagathiceras, Genus Pseudagathiceras Schindewolf , 1931 (ADRIANITIDAE) (FOSSIL)
- Pseudalaria, Subgenus Purpurina (Pseudalaria) Hudleston, 1887 (PURPURINIDAE) (FOSSIL)
- pseudalata, Annularisca pseudalata (C. de la Torre in H.A. Pilsbry & J. Henderson, 1912) - (POMATIIDAE)
- pseudalata minuta, Annularisca pseudalata minuta M.I. Sánchez Roig, 1951 - (POMATIIDAE)
- Pseudalinda, Genus Pseudalinda O. Bφttger, 1877 (CLAUSILIIDAE)
- Pseudallodiscus, Genus Pseudallodiscus F.M. Climo, 1971 (CHAROPIDAE)
- pseudalopia, Herilla durmitoris pseudalopia (A.J. Wagner, 1914) - (CLAUSILIIDAE)
- pseudalveata, Pyrgulina pseudalveata (S. Nomura, 1936) - (PYRAMIDELLIDAE)
- Pseudamaura, Subgenus Ampullina (Pseudamaura) Fischer, 1885 (AMPULLINIDAE) (FOSSIL)
- Pseudamiantis, Genus Pseudamiantis Kuroda, 1933 (VENERIDAE) (FOSSIL)
- Pseudammatoceras, syn of: Genus Bredyia Prinz, 1904 (HAMMATOCERATIDAE) (FOSSIL)
- Pseudamnicola, Genus Pseudamnicola M. Paulucci, 1878 (HYDROBIIDAE)
- Pseudamusium, syn of: Genus Pseudamussium O.A.L. Mφrch, 1853 (PECTINIDAE)
- Pseudamussium, Genus Pseudamussium O.A.L. Mφrch, 1853 (PECTINIDAE)
- pseudamussium, Pecten pseudamussium G.B. II Sowerby, 1842 - syn of: Lissochlamys exotica (L.W. Dillwyn, 1817) - (PECTINIDAE)
- Pseudamycla, Genus Pseudamycla G.L. Pace, 1902 (COLUMBELLIDAE)
- pseudamygdala, Purpura pseudamygdala C. Hedley, 1903 - syn of: Cronia aurantiaca (J.B. Hombron, 1835) - (MURICIDAE)
- pseudamygdala, Cronia pseudamygdala C. Hedley, 1903 - syn of: Cronia aurantiaca (J.B. Hombron, 1835) - (MURICIDAE)
- pseudamygdalum, Cypraea pseudamygdalum (F. Sacco, 1894 †) - (CYPRAEIDAE) (FOSSIL)
- Pseudanachis, Genus Pseudanachis K.H.J. Thiele, 1924 (COLUMBELLIDAE)
- pseudanaloga, Puncturella pseudanaloga A.W.B. Powell, 1957 - (FISSURELLIDAE)
- pseudanalogica, Puncturella pseudanalogica A.W.B. Powell, 1957 - syn of: Puncturella pseudanaloga A.W.B. Powell, 1957 - (FISSURELLIDAE)
- Pseudanchura, Genus Pseudanchura Kollmann, 2005 (APORRHAIDAE) (FOSSIL)
- Pseudancistroceras, Genus Pseudancistroceras (TARPHYCERIDA (UNASSIGNED)) (FOSSIL)
- Pseudancylastrum, Genus Pseudancylastrum W.A. Lindholm, 1909 (ACROLOXIDAE)
- Pseudancylus, syn of: Genus Ancylus O.F. Mόller, 1774 (PLANORBIDAE)
- Pseudancylus, syn of: Genus Ancylus O.F. Mόller, 1774 (PLANORBIDAE)
- pseudandreana, Gulella pseudandreana K.C. Emberton, 2001 - (STREPTAXIDAE)
- Pseudaneitea, Subgenus Athoracophorus (Pseudaneitea) T.D.A. Cockerell, 1891 (ATHORACOPHORIDAE)
- pseudangasi, Tritonoharpa pseudangasi A.G. Beu & P.A. Maxwell, 1987 - (CANCELLARIIDAE)
- pseudanguicula, Phenacharopa pseudanguicula (T. Iredale, 1913) - (CHAROPIDAE)
- pseudangulata, Pustulostrea pseudangulata (É. Lamy, 1930) - (OSTREIDAE)
- Pseudanodonta, Genus Pseudanodonta J.R. Bourguignat, 1876 (UNIONIDAE)
- Pseudantalis, syn of: Genus Fustiaria F. Stoliczka, 1868 (FUSTIARIIDAE)
- Pseudantilis, Subgenus Dentalium (Pseudantilis) Monterosato, 1884 (DENTALIIDAE) (FOSSIL)
- pseudaon, Dipoloceras pseudaon Spath, 1931 † - (BRANCOCERATIDAE) (FOSSIL)
- pseudaphera, Distorsionella pseudaphera A.G. Beu, 1998 - (PERSONIDAE)
- Pseudaphrodina, Genus Pseudaphrodina Casey, 1952 (VENERIDAE) (FOSSIL)
- Pseudaplysia, Subgenus Petalifera (Pseudaplysia) H.A. Pilsbry, 1896 (APLYSIIDAE)
- pseudapproximata, Turbonilla pseudapproximata (S. Nomura, 1936) - (PYRAMIDELLIDAE)
- pseudapproximata, Chemnitzia pseudapproximata S. Nomura, 1936 - syn of: Turbonilla pseudapproximata (S. Nomura, 1936) - (PYRAMIDELLIDAE)
- Pseudaptetoceras, Genus Pseudaptetoceras Gιczy , 1966 (HAMMATOCERATIDAE) (FOSSIL)
- Pseudaptyxis, Genus Pseudaptyxis Petuch, 1988 (FASCIOLARIIDAE) (FOSSIL)
- pseudarabicula, Erronea pseudarabicula G.S. Coen, 1949 - syn of: Erronea caurica (C. Linnaeus, 1758) - (CYPRAEIDAE)
- pseudaraonis, Clanculus pseudaraonis Strausz, 1966 † - (TROCHIDAE) (FOSSIL)
- Pseudarca, Genus Pseudarca Ulrich, 1894 (PSEUDARCIDAE) (FOSSIL)
- PSEUDARCIDAE Scarlato & Starobogatov, 1979 - Family (BIVALVIA-PALAEOHETERODONTA [Subclass]-LYRODESMATOIDEA [Superfamily]) (FOSSIL)
- Pseudarcopagia, Subgenus Arcopagia (Pseudarcopagia) V. Bertin, 1878 (TELLINIDAE)
- Pseudargentiniceras, Genus Pseudargentiniceras Spath, 1925 (NEOCOMITIDAE) (FOSSIL)
- pseudarianta, Fruticicola phaeozona pseudarianta (W.A. Lindholm, 1927) - (BRADYBAENIDAE)
- pseudarietina, Clymenia pseudarietina Rzehak, 1910 † - syn of: Protactoclymenia pseudarietina (Rzehak, 1910 †) - (CLYMENIIDAE) (FOSSIL)
- pseudarietina, Protactoclymenia pseudarietina (Rzehak, 1910 †) - (CYRTOCLYMENIIDAE) (FOSSIL)
- Pseudarietites, Genus Pseudarietites Frech, 1902 (PSEUDARIETITIDAE) (FOSSIL)
- PSEUDARIETITIDAE Bartzsch & Weyer, 1987 - Family (CEPHALOPODA-AMMONOIDEA [Subclass]-GONIATITIDA [Order]-PRIONOCERATOIDEA [Superfamily]) (FOSSIL)
- Pseudarion, syn of: Genus Gigantomilax O. Bφttger, 1883 (LIMACIDAE)
- Pseudarisphinctes, Genus Pseudarisphinctes Arkell, 1935 (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- Pseudartemon, syn of: Genus Haploptychius O.F. von Mφllendorff, 1905 (STREPTAXIDAE)
- Pseudasaphis, Genus Pseudasaphis Fischer, 1887 (NEOMIODONTIDAE) (FOSSIL)
- Pseudaspasita, Genus Pseudaspasita O.F. von Mφllendorff, 1902 (BRADYBAENIDAE)
- Pseudaspenites, Genus Pseudaspenites Spath , 1934 (ASPENITIDAE) (FOSSIL)
- Pseudaspidites, Genus Pseudaspidites Spath , 1934 (PROPTYCHITIDAE) (FOSSIL)
- Pseudaspidoceras, Genus Pseudaspidoceras Hyatt , 1903 (ACANTHOCERATIDAE) (FOSSIL)
- Pseudassiminea, Genus Pseudassiminea K.H.J. Thiele, 1927 (ASSIMINEIDAE) (FOSSIL)
- Pseudastarte, Genus Pseudastarte Cossmann, 1921 (CARDINIIDAE) (FOSSIL)
- Pseudastralium, syn of: Genus Bolma A. Risso, 1826 (TURBINIDAE)
- Pseudatoxon, Genus Pseudatoxon J.L. van Goethem, 1975 (UROCYCLIDAE)
- pseudattenuatus, Hamites pseudattenuatus Casey † - (HAMITIDAE) (FOSSIL)
- Pseudaturoidea, Genus Pseudaturoidea Shimansky, 1975 (HERCOGLOSSIDAE) (FOSSIL)
- Pseudaucella, Genus Pseudaucella Marwick, 1926 (PTERIIDAE) (FOSSIL)
- Pseudaulicina, Genus Pseudaulicina Chavan in Furon & Kouriatchy, 1948 (VOLUTIDAE) (FOSSIL)
- pseudaurantius, Tenorioconus pseudaurantius (D.L.N. Vink & R. von Cosel, 1985) - (CONIDAE)
- pseudauregani, Liparophaedusa pseudauregani (P. Dautzenberg & H. Fischer, 1908) - (CLAUSILIIDAE)
- Pseudaustenia, Genus Pseudaustenia T.D.A. Cockerell, 1891 (HELICARIONIDAE)
- pseudaustralia, Baryspira pseudaustralia R. Tate, 1889 † - syn of: Baryspira pseudoaustralis R. Tate, 1889 † - (ANCILLARIIDAE) (FOSSIL)
- Pseudavakubia, Genus Pseudavakubia de Winter & Vastenhout, 2013 (STREPTAXIDAE)
- pseudavara, Succinea pseudavara G.R. Webb, 1954 - (SUCCINEIDAE)
- pseudavellana, Niveria pseudavellana (F. Sacco, 1894) - (TRIVIIDAE)
- Pseudavena, Genus Pseudavena Sacco, 1897 (CEPHALASPIDA (UNASSIGNED)) (FOSSIL)
- pseudavenacea, Chondrina pseudavenacea B. Kokshoorn & E. Gittenberger, 2010 - (CHONDRINIDAE)
- Pseudavenionia, Genus Pseudavenionia M. Bodon & F.L. Giusti 1982 (HYDROBIIDAE)
- Pseudavicula, Genus Pseudavicula Jack & Etheridge, 1892 (AVICULOPECTINIDAE) (FOSSIL)
- Pseudavicula, syn of: Genus Prisodontopsis J.R. le B. Tomlin, 1928 (UNIONIDAE)
- Pseudaviculopecten, Genus Pseudaviculopecten Newell, 1938 (PTERINOPECTINIDAE) (FOSSIL)
- Pseudavionia, Genus Pseudavionia M. Bodon & F.L. Giusti, 1982 (HYDROBIIDAE)
- Pseudaxinea, syn of: Genus Glycymeris A. da Costa, 1778 (GLYCYMERIDIDAE)
- Pseudaxinus, Genus Pseudaxinus Salter, 1864 (LYRODESMATIDAE) (FOSSIL)
- Pseudazeca, syn of: Subgenus Ferussacia (Pegea) A. Risso, 1826 (FERUSSACIIDAE)
- Pseudazorita, syn of: Genus Lusitanops H. Nordsieck, 1968 (RAPHITOMIDAE)
- Pseudcupedora, Genus Pseudcupedora Solem, 1992 (CAMAENIDAE)
- Pseudechotrida, Genus Pseudechotrida J. Stanisic, 2010 (RHYTIDIDAE)
- Pseudegestula, Genus Pseudegestula R.K. Dell, 1954 (CHAROPIDAE)
- Pseudegestula, syn of: Genus Charopa J.A. Albers, 1860 (CHAROPIDAE)
- pseudelatus, Drymaeus pseudelatus F. Haas, 1951 - (BULIMULIDAE)
- pseudellipticum, Glyptophiceras pseudellipticum (Spath, 1930 †) - (KASHMIRITIDAE) (FOSSIL)
- Pseudelma, Genus Pseudelma W. Kobelt, 1904 (STREPTAXIDAE)
- pseudemmericia, Bithynia pseudemmericia H. Schütt, 1964 - (BITHYNIIDAE)
- Pseudendoceras, Genus Pseudendoceras Chen & Zou, 1979 (ELLESMEROCERIDA (UNASSIGNED)) (FOSSIL)
- Pseudendoplectoceras, Genus Pseudendoplectoceras Krφger , 2008 (PHRAGMOCERATIDAE) (FOSSIL)
- Pseudentolium, Genus Pseudentolium Cox, 1948 (PECTINIDA (UNASSIGNED)) (FOSSIL)
- pseudepistomium, Columbinia pseudepistomium J.R. Bourguignat, 1876 - syn of: Columbinia epistomium (H.C. Küster, 1847) - (CLAUSILIIDAE)
- pseuderbaensis, Phymatoceras pseuderbaensis Gabilly, 1976 † - (PHYMATOCERATIDAE) (FOSSIL)
- Pseuderiphyla, syn of: Genus Crassinella R.J.L. Guppy, 1874 (CRASSATELLIDAE)
- Pseudestea, Genus Pseudestea W.F. Ponder, 1967 (ANABATHRIDAE)
- Pseudeunema, syn of: Genus Proturritella Koken, 1889 (LOPHOSPIRIDAE) (FOSSIL)
- Pseudeupera, syn of: Genus Pisidium L. Pfeiffer, 1821 (SPHAERIIDAE)
- Pseudexomilus, Genus Pseudexomilus A. Powell, 1944 (HORAICLAVIDAE)
- Pseudharpoceras, Genus Pseudharpoceras Waagen, 1893 (COLUMBITIDAE) (FOSSIL)
- Pseudhelicarion, Subgenus Macrochlamys (Pseudhelicarion) O.F. von Mφllendorff, 1894 (ARIOPHANTIDAE)
- Pseudhelicoceras, Genus Pseudhelicoceras Whiteaves, 1884 (TURRILITIDAE) (FOSSIL)
- Pseudhemisinus, syn of: Genus Fagotia J.R. Bourguignat, 1884 (MELANOPSIDAE)
- Pseudhesseola, Genus Pseudhesseola H. Nordsieck, 1993 (HYGROMIIDAE)
- Pseudhimalayites, Genus Pseudhimalayites Spath, 1925 (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- pseudhomalosomus, Gyraulus pseudhomalosomus (Sauerzopf, 1953 ) - (PLANORBIDAE)
- Pseudiberus, Subgenus Cathaica (Pseudiberus) C.M.F. Ancey, 1887 (BRADYBAENIDAE)
- pseudida, Discodoris pseudida (L.S.R. Bergh, 1907) - (DISCODORIDIDAE)
- pseudida, Doris pseudida L.S.R. Bergh, 1907 - syn of: Discodoris pseudida (L.S.R. Bergh, 1907) - (DORIDIDAE)
- Pseudidyla, Genus Pseudidyla Boettger, 1877 (CLAUSILIIDAE) (FOSSIL)
- pseudimperialis, Rhombiconus pseudimperialis (R.G. Moolenbeek, A. Zandbergen & P. Bouchet, 2008) - (CONIDAE)
- pseudinane, Desmoceras pseudinane Shimizu, 1935 † - (DESMOCERATIDAE) (FOSSIL)
- pseudinversa, Synprosphyma pseudinversa H. Nordsieck, 2001 - (CLAUSILIIDAE)
- Pseudinvoluticeras, Genus Pseudinvoluticeras Spath, 1925 (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- Pseudiotula, Genus Pseudiotula Stanisic, 2010 (PUNCTIDAE)
- Pseudiscus, Subgenus Helicodiscus (Pseudiscus) J.P.E. Morrison, 1942 (HELICODISCIDAE)
- Pseudisidora, Subgenus Galba (Pseudisidora) K.H.J. Thiele, 1931 (LYMNAEIDAE)
- pseudislandica, Chlamys pseudislandica F.S. MacNeil, 1967 - syn of: Chlamys behringiana A.T. von Middendorff, 1849 - (PECTINIDAE)
- Pseudisocardia, Genus Pseudisocardia Douvillι, 1912 (DICEROCARDIIDAE) (FOSSIL)
- pseudmoorei, Acteonina pseudmoorei J. Gründel & Buchholz, 1999 † - syn of: Cylindrobullina pseudmoorei (J. Gründel & Buchholz, 1999 †) - (ACTEONINIDAE) (FOSSIL)
- pseudmoorei, Cylindrobullina pseudmoorei (J. Gründel & Buchholz, 1999 †) - (CYLINDROBULLINIDAE) (FOSSIL)
- pseudoachatinoides, Viviparus pseudoachatinoides (Pavlov, 1925 †) - (VIVIPARIDAE) (FOSSIL)
- Pseudoacirsa, syn of: Genus Acirsa O.A.L. Mφrch, 1857 (EPITONIIDAE)
- Pseudoaclisina, Genus Pseudoaclisina E.K. Yoo, 1994 (MURCHISONELLIDAE)
- pseudoacuta, Trigonia pseudoacuta Dickan, 1990 † - (TRIGONIIDAE) (FOSSIL)
- pseudoadeorbis, Valvata pseudoadeorbis Sinzov, 1880 † - (VALVATIDAE) (FOSSIL)
- pseudoaegopinella, Retinella pseudoaegopinella F.L. Giusti, A. Boato & M. Bodon, 1986 - (ZONITIDAE)
- Pseudoaganides, Genus Pseudoaganides (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- pseudoalpestris, Valvata pseudoalpestris Š. Brusina, 1902 † - (VALVATIDAE) (FOSSIL)
- Pseudoaluca, syn of: Genus Pseudoaluco B.L. Clark & J.W. Durham, 1946 (CERITHIIDAE) (FOSSIL)
- Pseudoaluco, Genus Pseudoaluco B.L. Clark & J.W. Durham, 1946 (CERITHIIDAE) (FOSSIL)
- Pseudoalvania, syn of: Genus Alvania A. Risso, 1826 (RISSOIDAE)
- Pseudoamaltheus, Subgenus Amaltheus (Pseudoamaltheus) D'Orbigny, 1844 (AMALTHEIDAE) (FOSSIL)
- Pseudoampullaria, syn of: Genus Petterdiana J.W. Brazier, 1896 (HYDROBIIDAE)
- Pseudoanachis, syn of: Genus Pseudanachis K.H.J. Thiele, 1924 (COLUMBELLIDAE)
- pseudoanceps, Ebrayiceras pseudoanceps (Ebray, 1864 †) - (MORPHOCERATIDAE) (FOSSIL)
- Pseudoancyloceras, Genus Pseudoancyloceras Stenshin, Shumilkin & Uspensky, 2014 (ANCYLOCERATIDAE) (FOSSIL)
- Pseudoandonia, Genus Pseudoandonia M.A. Moroni & G. Ruggieri, 1981 (BUCCINIDAE) (FOSSIL)
- pseudoangasi, Tritonoharpa pseudoangasi A.G. Beu & P.A. Maxwell, 1987 - syn of: Tritonoharpa pseudangasi A.G. Beu & P.A. Maxwell, 1987 - (CANCELLARIIDAE)
- pseudoangulatum, Acrosterigma pseudoangulatum C. Bülow, 1905 - syn of: Vasticardium philippinense (C. Hedley, 1899) - (CARDIIDAE)
- pseudoangulicostatum, Crioceratites pseudoangulicostatum Sarkar, 1955 † - (CRIOCERATITIDAE) (FOSSIL)
- pseudoangusta, Naticopsis pseudoangusta E.A.L. Kittl, 1894 † - syn of: Hologyra fastigiata (Stoppani, 1857 †) - (DELPHINULOPSIDAE) (FOSSIL)
- pseudoannulata, Lophiotoma pseudoannulata R.K. Dell, 1990 - (TURRIDAE)
- Pseudoanodonta, syn of: Genus Pseudanodonta J.R. Bourguignat, 1876 (UNIONIDAE)
- pseudoantiquata, Arca pseudoantiquata K. Martin, 1883 † - (ARCIDAE) (FOSSIL)
- Pseudoaplysia, syn of: Genus Petalifera J.E. Gray, 1847 (APLYSIIDAE)
- pseudoappeliusi, Bela pseudoappeliusi Naldi, G. Della Bella & Scarponi, 2013 † - (MANGELIIDAE) (FOSSIL)
- Pseudoaptyxis, Genus Pseudoaptyxis Petuch, 1988 (FASCIOLARIIDAE) (FOSSIL)
- pseudoaratus, Murex pseudoaratus A.E.M. Cossmann & M.A. Peyrot, 1923 † - (MURICIDAE) (FOSSIL)
- pseudoarchibaldi, Leislingites pseudoarchibaldi Tatzreiter, 1980 † - (THETIDITIDAE) (FOSSIL)
- pseudoarenaria, Mya pseudoarenaria H.A. Schlesch, 1931 - (MYIDAE)
- pseudoareolata, Alvania pseudoareolata A. Warén, 1974 - (RISSOIDAE)
- pseudoargus, Doris pseudoargus J.L. Rapp, 1827 - (DORIDIDAE)
- pseudoargus, Dosinia pseudoargus d'Archiac & Haime, 1853 † - (VENERIDAE) (FOSSIL)
- pseudoargus flammea, Doris pseudoargus flammea J. Alder & A. Hancock, 1844 - (DORIDIDAE)
- pseudoargus gedrosiana, Dosinia pseudoargus gedrosiana E.W. Vredenburg, 1928 - (VENERIDAE)
- pseudoaristata, Vitrinella pseudoaristata F. Rubio, R. Fernández-Garcés & E. Rolán, 2011 - (TORNIDAE)
- pseudoarmata, Alaria pseudoarmata W.H. Hudleston, 1884 † - (APORRHAIDAE) (FOSSIL)
- pseudoarmatum, Pseudoxybeloceras pseudoarmatum Wright & E. Matsumoto 1954 † - (DIPLOMOCERATIDAE) (FOSSIL)
- pseudoarmoricus, Conus pseudoarmoricus P. Marshall & R. Murdoch, 1920 † - (CONIDAE) (FOSSIL)
- pseudoasperata, Brotia pseudoasperata R.A.M. Brandt, 1968 - (PACHYCHILIDAE)
- Pseudoaspidoceras, Genus Pseudoaspidoceras Benavides-Caceres, 1956 (ACANTHOCERATIDAE) (FOSSIL)
- pseudoassimilis, Aplus pseudoassimilis Brunetti & Della Bella, 2016 † - (BUCCINIDAE) (FOSSIL)
- Pseudoasthenothaerus, Subgenus Parvithracia (Pseudoasthenothaerus) G.M. Kamenev, 2002 (THRACIIDAE)
- pseudoasulcata, Niveria pseudoasulcata (F. Sacco, 1894) - (TRIVIIDAE)
- pseudoatlas, Cymatoceras pseudoatlas Yabe & Shimizu, 1924 † - (CYMATOCERATIDAE) (FOSSIL)
- pseudoatropida, Staja pseudoatropida E. Jekelius, 1944 † - (HYDROBIIDAE) (FOSSIL)
- pseudoattenuata, Mangelia pseudoattenuata R. Ardovini, 2004 - (MANGELIIDAE)
- pseudoaudouli, Acantholytoceras tenuicostatum pseudoaudouli Thomel, 1964 † - (MACROSCAPHITIDAE) (FOSSIL)
- pseudoaurantius, Conus pseudoaurantius D.L.N. Vink & R. von Cosel, 1985 - syn of: Tenorioconus pseudaurantius (D.L.N. Vink & R. von Cosel, 1985) - (CONIDAE)
- pseudoaurantius, Cystiscus pseudoaurantius F. Boyer, 2003 - (CYSTISCIDAE)
- pseudoaustini, Conus pseudoaustini G.W. Nowell-Usticke, 1968 - syn of: Conasprella bajanensis (G.W. Nowell-Usticke, 1968) - (CONIDAE)
- Pseudoaustraliceras, Genus Pseudoaustraliceras Kakabadze , 1981 (ANCYLOCERATIDAE) (FOSSIL)
- pseudoaustralis, Baryspira pseudoaustralis R. Tate, 1889 † - (ANCILLARIIDAE) (FOSSIL)
- pseudoaustralis, Acutoliva pseudoaustralis (H. Woodward, 1879 †) - (OLIVIDAE) (FOSSIL)
- pseudoaustriaca, Melanopsis pseudoaustriaca Sauerzopf, 1952 † - (MELANOPSIDAE) (FOSSIL)
- pseudoazovica, Turricaspia pseudoazovica V.V. Anistratenko & Gozhik, 1995 † - (HYDROBIIDAE) (FOSSIL)
- Pseudobabylonella, Genus Pseudobabylonella M.M. Brunetti, G. Della Bella, M. Forli & G. Vecchi, 2009 (CANCELLARIIDAE)
- Pseudobactrites, Genus Pseudobactrites Ferronniιre, 1921 (BACTRITIDAE) (FOSSIL)
- pseudobacuana, Pyrgula pseudobacuana B.M. Logvinenko & Y.I. Starobogatov, 1968 - (HYDROBIIDAE)
- Pseudobaculites, Genus Pseudobaculites Cobban , 1952 (BACULITIDAE) (FOSSIL)
- Pseudobaicalia, Subgenus Baicalia (Pseudobaicalia) W.A. Lindholm, 1909 (AMNICOLIDAE)
- Pseudobaikalia, syn of: Subgenus Baicalia (Pseudobaicalia) W.A. Lindholm, 1909 (AMNICOLIDAE)
- Pseudobakewellia, Genus Pseudobakewellia Noinsky, 1913 (PTERINEIDAE) (FOSSIL)
- Pseudobalea, Subgenus Obeliscus (Pseudobalea) R.J. Shuttleworth, 1854 (SUBULINIDAE)
- pseudobandatum, Phalium pseudobandatum S.K. Tan, H.E. Ng & L.H.S. Nguang, 2013 - (CASSIDAE)
- pseudobandongensis, Turritella pseudobandongensis E.W. Vredenburg, 1928 † - (TURRITELLIDAE) (FOSSIL)
- Pseudobaphia, Genus Pseudobaphia C.T. Simpson, 1900 (UNIONIDAE)
- pseudobarbata, Didimacar pseudobarbata (Szalai 1926) † - (NOETIIDAE) (FOSSIL)
- pseudobarbatus, Modiolus pseudobarbatus K.W. Ockelmann, 1983 - syn of: Modiolus carvalhoi M.A. Klappenbach, 1966 - (MYTILIDAE)
- Pseudobarroisiceras, Genus Pseudobarroisiceras Shimizu, 1932 (COLLIGNONICERATIDAE) (FOSSIL)
- pseudobathyraphis, Bolma pseudobathyraphis A. Alf, P. Maestrati & P. Bouchet, 2010 - (TURBINIDAE)
- Pseudobaylea, Genus Pseudobaylea Dickins , 1963 (GOSSELETINIDAE) (FOSSIL)
- Pseudobba, syn of: Genus Camaena J.A. Albers, 1850 (CAMAENIDAE)
- Pseudobellardia, Genus Pseudobellardia Cox, 1931 (PACHYCHILIDAE) (FOSSIL)
- pseudobellum, Conocardium pseudobellum Pojeta & Runnegar, 1976 † - (CONOCARDIIDAE) (FOSSIL)
- Pseudobelus, Genus Pseudobelus Stolley, 1913 (DUVALIIDAE) (FOSSIL)
- Pseudobenedictia, Genus Pseudobenedictia T.Y. Sitnikova, 1987 (LITHOGLYPHIDAE)
- pseudobensoni, Metaphaedusa pseudobensoni (O. Böttger & P.B. Schmacker, 1894) - (CLAUSILIIDAE)
- pseudobensoni aberrans, Metaphaedusa pseudobensoni aberrans H. Nordsieck, 2003 - (CLAUSILIIDAE)
- pseudobertrandi, Discoidellia pseudobertrandi Cecca & al., 1998 † - (PULCHELLIIDAE) (FOSSIL)
- pseudobesa, Melanopsis pseudobesa K. Bandel, 2000 † - (MELANOPSIDAE) (FOSSIL)
- pseudobesula, Triphora pseudobesula F. Nordsieck & F.F. Talavera, 1979 - syn of: Marshallora adversa (G. Montagu, 1803) - (TRIPHORIDAE)
- pseudobesus, Drymaeus pseudobesus A.S.H. Breure, 1979 - (BULIMULIDAE)
- pseudobeudanti, Pecten pseudobeudanti Deperet & F. Roman, 1902 † - (PECTINIDAE) (FOSSIL)
- pseudobhavani, Maorites pseudobhavani Spath, 1953 † - (KOSSMATICERATIDAE) (FOSSIL)
- pseudobicarinata, Lambis pseudobicarinata A.V.M.D. D'Orbigny, 1850 † - (STROMBIDAE) (FOSSIL)
- pseudobiconica, Benthofascis pseudobiconica J.K. Tucker, M.J. Tenorio & P. Stahlschmidt, 2011 - (CONORBIDAE)
- pseudobidens, Papillifera solida pseudobidens H. Nordsieck, 2013 - (CLAUSILIIDAE)
- Pseudobigalea, Genus Pseudobigalea Hoare & al., 1982 (PSEUDOBIGALEAIDAE) (FOSSIL)
- PSEUDOBIGALEAIDAE Hoare & al., 2002 - Family (ROSTROCONCHIA-CONOCARDIIDA [Order]-HIPPOCARDIOIDEA [Superfamily]) (FOSSIL)
- Pseudobigotella, syn of: Genus Bigotites Nicolesco, 1918 (PERISPHINCTIDAE) (FOSSIL)
- pseudobiimpressa, Nodosoclymenia pseudobiimpressa Czarnocki, 1989 † - (PLATYCLYMENIIDAE) (FOSSIL)
- pseudobilingue, Eumorphoceras pseudobilingue Bisat, 1922 † - (GIRTYOCERATIDAE) (FOSSIL)
- pseudobilirata, Pandora pseudobilirata S. Nomura & K.M. Hatai, 1940 - syn of: Pandora bilirata T.A. Conrad, 1855 - (PANDORIDAE)
- pseudobilobatum, Falcitornoceras pseudobilobatum (Dybczynski, 1913 †) - (TORNOCERATIDAE) (FOSSIL)
- pseudobinodosa, Wuxuanella pseudobinodosa (Heidelberger, 2001 †) - (MURCHISONIIDAE) (FOSSIL)
- pseudobinotata, Delima montenegrina pseudobinotata (O. Böttger, 1907) - (CLAUSILIIDAE)
- pseudobiplex, Glaucolithites pseudobiplex (Pruvost, 1925 †) - (DORSOPLANITIDAE) (FOSSIL)
- pseudobistriata, Galeodea pseudobistriata F. Settepassi, 1970 - syn of: Galeodea echinophora (C. Linnaeus, 1758) - (CASSIDAE)
- Pseudobithynia, Genus Pseudobithynia P. Glφer & V.M. Peic, 2006 (BITHYNIIDAE)
- Pseudobittium, syn of: Subgenus Bittium (Semibittium) A.E.M. Cossmann, 1896 (CERITHIIDAE) (FOSSIL)
- pseudobliquistoma, Cerithium rubiginosum pseudobliquistoma Szalai † - (CERITHIIDAE) (FOSSIL)
- Pseudobolloceras, Genus Pseudobolloceras Zhuravleva, 1972 (DISCOSORIDA (UNASSIGNED)) (FOSSIL)
- Pseudobornella, syn of: Genus Dendronotus J. Alder & A. Hancock, 1845 (DENDRONOTIDAE)
- pseudobouchardianus, Nautilus pseudobouchardianus L. Spengler, 1910 † - syn of: Eutrephoceras charpentieri (Leymerie, 1851 †) - (NAUTILIDAE) (FOSSIL)
- pseudobovei, Mitra pseudobovei T. Cossignani & V. Cossignani, 2005 - (MITRIDAE)
- Pseudobrancoceras, Genus Pseudobrancoceras Kennedy , 2004 (LYELLICERATIDAE) (FOSSIL)
- pseudobrandaris, Murex pseudobrandaris J.P.S. Grateloup, 1833 - syn of: Bolinus brandaris (C. Linnaeus, 1758) - (MURICIDAE)
- pseudobrandaris zanardii, Murex pseudobrandaris zanardii F. Settepassi, 1970 - syn of: Bolinus brandaris (C. Linnaeus, 1758) - (MURICIDAE)
- pseudobraunianum, Zugodactylites pseudobraunianum Monestier, 1931 † - (DACTYLIOCERATIDAE) (FOSSIL)
- Pseudobrechites, Genus Pseudobrechites Magne, 1941 (PENICILLIDAE) (FOSSIL)
- Pseudobrevicoceras, Genus Pseudobrevicoceras Zhuravleva, 1974 (ONCOCERIDA (UNASSIGNED)) (FOSSIL)
- Pseudobrightia, Genus Pseudobrightia Jeannet, 1951 (OPPELIIDAE) (FOSSIL)
- Pseudobrochidium, Genus Pseudobrochidium Grupe, 1907 (GASTROPODA INCERTAE SEDIS) (FOSSIL)
- Pseudobrodieia, syn of: Genus Brodieia Buckman, 1899 (PHYMATOCERATIDAE) (FOSSIL)
- pseudobrunnea, Gymnodoris pseudobrunnea Knutson & T.M. Gosliner, 2014 - (GYMNODORIDIDAE)
- pseudobruntrutana, Ptygmatis pseudobruntrutana C. Gemmellaro, 1865 † - (NERINEIDAE) (FOSSIL)
- pseudobryerea, Rissoina pseudobryerea (G. Nevill, 1881) - (RISSOINIDAE)
- pseudobryerea, Zebina pseudobryerea (G. Nevill, 1881) - syn of: Rissoina pseudobryerea (G. Nevill, 1881) - (ZEBINIDAE)
- pseudobscura, Minolia pseudobscura (M. Yokoyama, 1927) - (SOLARIELLIDAE)
- pseudobuccinum, Siphonalia pseudobuccinum J.C. Melvill, 1888 - (BUCCINIDAE)
- Pseudobuccinum, Genus Pseudobuccinum Meek & Hayden, 1857 (NEOGASTROPODA (UNASSIGNED)) (FOSSIL)
- pseudobucephala, Melongena pseudobucephala Noetling, 1901 † - (MELONGENIDAE) (FOSSIL)
- Pseudobuliminus, Genus Pseudobuliminus P.V. Gredler, 1886 (BRADYBAENIDAE)
- Pseudobulimulus, syn of: Genus Pseudobuliminus P.V. Gredler, 1886 (BRADYBAENIDAE)
- Pseudobursa, syn of: Genus Bursa P.F. Rφding, 1798 (BURSIDAE)
- Pseudobythinella, Genus Pseudobythinella J.Y. Liu & S. Zhang, 1982 (AMNICOLIDAE)
- Pseudocadella, Genus Pseudocadella M. Huber, Langleit & Kreipl, 2015 (TELLINIDAE)
- Pseudocadoceras, Genus Pseudocadoceras Buckman , 1918 (CADOCERATIDAE) (FOSSIL)
- Pseudocaelatura, syn of: Genus Dancea A. Zilch, 1960 (HELICARIONIDAE)
- pseudocalamiteum, Anaspyroceras pseudocalamiteum (Barrande, 1866 †) - (DAWSONOCERATIDAE) (FOSSIL)
- Pseudocalaxis, Subgenus Calaxis (Pseudocalaxis) P.M. Pallary, 1912 (FERUSSACIIDAE)
- pseudocalcaratus, Spondylus pseudocalcaratus Tashiro, 1976 † - (SPONDYLIDAE) (FOSSIL)
- Pseudocaldwellia, syn of: Genus Louisia H.H. Godwin-Austen, 1908 (HELICARIONIDAE)
- pseudocaledonicus, Placostylus pseudocaledonicus (W. Kobelt, 1891) - (BOTHRIEMBRYONTIDAE)
- pseudocaledonicus, Bulimus pseudocaledonicus R.P. Montrouzier, 1859 - syn of: Placostylus scarabus (J.A. Albers, 1854) - (BULIMULIDAE)
- pseudocaledonicus, Bulimus pseudocaledonicus W. Kobelt, 1891 - syn of: Placostylus pseudocaledonicus (W. Kobelt, 1891) - (BULIMULIDAE)
- pseudocaledonicus chrysochilus, Placostylus pseudocaledonicus chrysochilus J.C.H. Crosse, 1894 - (BOTHRIEMBRYONTIDAE)
- pseudocaledonicus dentata, Bulimus pseudocaledonicus dentata J. Gassies, 1871 - syn of: Placostylus scarabus (J.A. Albers, 1854) - (BULIMULIDAE)
- pseudocaledonicus dentatus, Placostylus pseudocaledonicus dentatus (J. Gassies, 1871) - (BOTHRIEMBRYONTIDAE)
- pseudocaledonicus dentatus, Bulimus pseudocaledonicus dentatus J. Gassies, 1871 - syn of: Placostylus pseudocaledonicus dentatus (J. Gassies, 1871) - (BULIMULIDAE)
- pseudocaledonicus hybrida, Placostylus pseudocaledonicus hybrida W. Kobelt, 1891 - syn of: Placostylus scarabus (J.A. Albers, 1854) - (BOTHRIEMBRYONTIDAE)
- pseudocaledonicus hybridus, Placostylus pseudocaledonicus hybridus W. Kobelt - (BOTHRIEMBRYONTIDAE)
- pseudocaledonicus incerta, Placostylus pseudocaledonicus incerta J.C.H. Crosse, 1895 - syn of: Placostylus caledonicus S.A.A. Petit De La Saussaye, 1845 - (BOTHRIEMBRYONTIDAE)
- pseudocaledonicus intermedia, Placostylus pseudocaledonicus intermedia J.C.H. Crosse, 1894 - syn of: Placostylus scarabus (J.A. Albers, 1854) - (BOTHRIEMBRYONTIDAE)
- pseudocaledonicus nigra, Placostylus pseudocaledonicus nigra J.C.H. Crosse, 1894 - syn of: Placostylus scarabus (J.A. Albers, 1854) - (BOTHRIEMBRYONTIDAE)
- pseudocaledonicus pala, Placostylus pseudocaledonicus pala J.C.H. Crosse, 1894 - syn of: Placostylus scarabus (J.A. Albers, 1854) - (BOTHRIEMBRYONTIDAE)
- pseudocaledonicus pouenanus, Placostylus pseudocaledonicus pouenanus W. Kobelt, 1891 - syn of: Placostylus scarabus (J.A. Albers, 1854) - (BOTHRIEMBRYONTIDAE)
- pseudocaledonicus poumeana, Placostylus pseudocaledonicus poumeana J.C.H. Crosse, 1894 - syn of: Placostylus scarabus (J.A. Albers, 1854) - (BOTHRIEMBRYONTIDAE)
- pseudocaledonicus rufa, Placostylus pseudocaledonicus rufa J.C.H. Crosse, 1894 - syn of: Placostylus scarabus (J.A. Albers, 1854) - (BOTHRIEMBRYONTIDAE)
- pseudocaledonicus subulata, Placostylus pseudocaledonicus subulata J.C.H. Crosse, 1894 - syn of: Placostylus scarabus (J.A. Albers, 1854) - (BOTHRIEMBRYONTIDAE)
- pseudocaledonicus umbilicatus, Placostylus pseudocaledonicus umbilicatus W. Kobelt, 1891 - syn of: Placostylus porphyrostomus smithii W. Kobelt, 1891 - (BOTHRIEMBRYONTIDAE)
- Pseudocalycoceras, Genus Pseudocalycoceras Sharpe, 1853 (ACANTHOCERATIDAE) (FOSSIL)
- pseudocampesinus, Iberus campesinus pseudocampesinus (W. Kobelt, 1909) - (HELICIDAE)
- Pseudocampylaea, Genus Pseudocampylaea L. Pfeiffer, 1877 (HYGROMIIDAE)
- Pseudocampylaea, syn of: Genus Metafruticicola H.F.A. von Ihering, 1892 (HYGROMIIDAE)
- Pseudocampylites, Genus Pseudocampylites Jeannet , 1951 (OPPELIIDAE) (FOSSIL)
- pseudocana, Eutriphora pseudocana B.A. Marshall, 1983 - (TRIPHORIDAE)
- pseudocanaricus, Pogonodon pseudocanaricus (P. Bouchet, 1985) - (TRIPHORIDAE)
- pseudocancellata, Merica pseudocancellata Noetling, 1901 † - (CANCELLARIIDAE) (FOSSIL)
- Pseudocancilla, Genus Pseudocancilla A.E.M. Cossmann, 1913 (MITRIDAE)
- pseudocapensis, Semimytilus pseudocapensis (É. Lamy, 1931) - (MYTILIDAE)
- Pseudocaprina, Genus Pseudocaprina Chartrousse & Masse, 2004 (CAPRINIDAE) (FOSSIL)
- pseudocarbonaria, Crassispira pseudocarbonaria F. Nolf, 2009 - (PSEUDOMELATOMIDAE)
- Pseudocardia, Genus Pseudocardia Conrad, 1866 (CARDITIDAE) (FOSSIL)
- pseudocardinalis, Purpuriconus pseudocardinalis (J. Coltro, 2004) - (CONIDAE)
- Pseudocardinia, Genus Pseudocardinia Martinson, 1959 (PSEUDOCARDINIIDAE) (FOSSIL)
- PSEUDOCARDINIIDAE Martinson, 1961 - Family (BIVALVIA-PALAEOHETERODONTA [Subclass]-TRIGONIIDA [Order]-PSEUDOCARDINIOIDEA [Superfamily]) (FOSSIL)
- Pseudocardioceras, Genus Pseudocardioceras Tozer , 1971 (JUVAVITIDAE) (FOSSIL)
- pseudocardita, Centrocardita pseudocardita (J. Poutiers, 1981) - (CARDITIDAE)
- pseudocardium, Cardium pseudocardium G.P. Deshayes, 1838 - syn of: Monodacna caspia (K.E.I. von Eichwald, 1829) - (CARDIIDAE)
- Pseudocardium, Genus Pseudocardium Gabb, 1866 (MACTRIDAE) (FOSSIL)
- pseudocarinata, Brasovia pseudocarinata (Roshka, 1973 †) - (HYDROBIIDAE) (FOSSIL)
- pseudocarinata, Crassispira pseudocarinata (L.A. Reeve, 1845) - (PSEUDOMELATOMIDAE)
- pseudocarinata, Miocardiopsis pseudocarinata Berezovsky, 2010 † - (TRAPEZIDAE) (FOSSIL)
- pseudocarinatum, Gemmellaroceras pseudocarinatum (Venturi & al., 2005 †) - (POLYMORPHITIDAE) (FOSSIL)
- pseudocarinatum, Pelingoceras pseudocarinatum Venturi & al., 2005 † - syn of: Gemmellaroceras pseudocarinatum (Venturi & al., 2005 †) - (POLYMORPHITIDAE) (FOSSIL)
- pseudocarinatum, Sporadoceras pseudocarinatum Petter, 1959 † - (SPORADOCERATIDAE) (FOSSIL)
- pseudocarinatus, Viviparus pseudocarinatus (B. Walker, 1919) - (VIVIPARIDAE)
- pseudocarnaria, Strigilla pseudocarnaria K.J. Boss, 1969 - (TELLINIDAE)
- Pseudocarnites, Genus Pseudocarnites Simionescu, 1913 (CARNITIDAE) (FOSSIL)
- pseudocarpathica, Subthurmannia pseudocarpathica Hoedemaeker, 2016 † - (NEOCOMITIDAE) (FOSSIL)
- Pseudocaspia, Genus Pseudocaspia Y.I. Starobogatov, 1972 (HYDROBIIDAE)
- pseudocaspia, Hydrobia pseudocaspia Sinzow, 1912 † - (HYDROBIIDAE) (FOSSIL)
- Pseudocassis, Genus Pseudocassis Pictet & Campiche in Pictet, 1863 (CEPHALASPIDA (UNASSIGNED)) (FOSSIL)
- pseudocastor, Palaeanodonta pseudocastor (Betekhtina †) - (PALAEANODONTIDAE) (FOSSIL)
- Pseudocatastroboceras, Genus Pseudocatastroboceras H. Turner, 1965 (NAUTILIDA (UNASSIGNED)) (FOSSIL)
- Pseudocatillus, Genus Pseudocatillus Andrussow, 1903 (CARDIIDAE) (FOSSIL)
- pseudocatillus, Pseudocatillus pseudocatillus (Barbot de Marny, 1869 †) - (CARDIIDAE) (FOSSIL)
- pseudocatillus, Cardium pseudocatillus O.A. Grimm, 1877 - syn of: Monodacna albida (B.M. Logvinenko & Y.I. Starobogatov, 1967) - (CARDIIDAE)
- pseudocatillus, Cardium pseudocatillus Barbot de Marny, 1869 † - syn of: Pseudocatillus pseudocatillus (Barbot de Marny, 1869 †) - (CARDIIDAE) (FOSSIL)
- pseudocatillus larga, Pseudocatillus pseudocatillus larga Taktakishvili, 1966 † - (CARDIIDAE) (FOSSIL)
- pseudocaudata, Pterotrigonia pseudocaudata van Hoepen 1929 † - (PTEROTRIGONIIDAE) (FOSSIL)
- pseudocaudata, Trigonia pseudocaudata J. Hector, 1886 † - (TRIGONIIDAE) (FOSSIL)
- pseudocellata, Erosaria marginalis pseudocellata (F.A. Schilder & M. Schilder, 1938) - (CYPRAEIDAE)
- Pseudoceltites, Genus Pseudoceltites Kummel, 1969 (COLUMBITIDAE) (FOSSIL)
- Pseudocenoceras, Genus Pseudocenoceras Spath, 1927 (NAUTILIDAE) (FOSSIL)
- Pseudocerastus, syn of: Subgenus Pseudoglessula (Kempioconcha) H.B. Preston, 1913 (SUBULINIDAE)
- pseudoceratodes, Lanistes pseudoceratodes (W.A. Wenz, 1928) - (AMPULLARIIDAE)
- Pseudoceratus, syn of: Subgenus Pseudoglessula (Kempioconcha) H.B. Preston, 1913 (SUBULINIDAE)
- Pseudocerithium, Subgenus Cryptaulax (Pseudocerithium) Cossmann, 1884 (CRYPTAULACIDAE) (FOSSIL)
- Pseudocerva, syn of: Genus Clausilia J.P.R. Draparnaud, 1805 (CLAUSILIIDAE)
- Pseudochama, Genus Pseudochama N.H. Odhner, 1917 (CHAMIDAE)
- pseudochama, Spondylus pseudochama K. Schreibers, 1793 - syn of: Spondylus nicobaricus K. Schreibers, 1793 - (SPONDYLIDAE)
- Pseudocharopa, Genus Pseudocharopa A.J. Peile, 1929 (CHAROPIDAE)
- Pseudochemnitzia, syn of: Genus Graphis J.G. Jeffreys, 1867 (TOFANELLIDAE)
- Pseudochileutomia, Genus Pseudochileutomia Friedberg, 1938 (MOLLUSCA INCERTAE SEDIS) (FOSSIL)
- Pseudochilina, syn of: Genus Chilina J.E. Gray, 1828 (CHILINIDAE)
- pseudochinensis, Tellinides pseudochinensis M. Huber, A. Langleit & K. Kreipl, 2015 - (TELLINIDAE)
- pseudochloris, Berthelinia pseudochloris (E.A. Kay, 1964) - (JULIIDAE)
- pseudochloris, Berthellina pseudochloris E.A. Kay, 1964 - syn of: Berthelinia pseudochloris (E.A. Kay, 1964) - (PLEUROBRANCHIDAE)
- Pseudochloritis, Genus Pseudochloritis O. Bφttger, 1909 (ELONIDAE) (FOSSIL)
- Pseudochondrula, Genus Pseudochondrula P. Hesse, 1933 (ENIDAE)
- Pseudochrysalis, Subgenus Coelostylina (Pseudochrysalis) Kittl, 1894 (COELOSTYLINIDAE) (FOSSIL)
- Pseudocidoceras, Subgenus Docidoceras (Pseudocidoceras) Westermann, 1969 (OTOITIDAE) (FOSSIL)
- pseudocimex, Alvania pseudocimex Seguenza, 1903 † - (RISSOIDAE) (FOSSIL)
- pseudocingenda, Nerinea pseudocingenda W.H. Hudleston, 1890 † - (NERINEIDAE) (FOSSIL)
- pseudocingulata, Campylaea trizona pseudocingulata (A.J. Wagner, 1914) - (HELICIDAE)
- pseudocingulata, Setia pseudocingulata F. Nordsieck, 1972 - syn of: Crisilla galvagni (A. Aradas & G. Maggiore, 1844) - (RISSOIDAE)
- pseudocingulata, Crisilla pseudocingulata F. Nordsieck, 1972 - syn of: Crisilla galvagni (A. Aradas & G. Maggiore, 1844) - (RISSOIDAE)
- pseudocircumstriata, Tryonia pseudocircumstriata Czaja & Estrada-Rodriguez, 2015 - (COCHLIOPIDAE)
- Pseudocirsope, Genus Pseudocirsope O. Bφttger, 1907 (ELACHISINIDAE) (FOSSIL)
- Pseudoclambites, Genus Pseudoclambites Spath, 1925 (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- Pseudoclanculus, Genus Pseudoclanculus A.E.M. Cossmann, 1918 (CHILODONTIDAE) (FOSSIL)
- pseudoclarae, Comitas pseudoclarae A.W.B. Powell, 1944 - (PSEUDOMELATOMIDAE)
- Pseudoclaraia, syn of: Genus Claraia Bittner, 1901 (PTERINOPECTINIDAE) (FOSSIL)
- Pseudoclavator, syn of: Genus Leucotaenius E.C. Von Martens in J.A. Albers, 1860 (ACAVIDAE)
- Pseudoclaviscala, Genus Pseudoclaviscala Dockery, 1993 (EPITONIIDAE) (FOSSIL)
- Pseudocleopatra, Genus Pseudocleopatra K.H.J. Thiele, 1928 (PALUDOMIDAE)
- pseudoclimax, Euspira pseudoclimax A.E.M. Cossmann, 1888 † - (NATICIDAE) (FOSSIL)
- Pseudoclymenia, Genus Pseudoclymenia Frech , 1897 (PSEUDOCLYMENIIDAE) (FOSSIL)
- PSEUDOCLYMENIIDAE Becker, 1993 - Family (CEPHALOPODA-AMMONOIDEA [Subclass]-GONIATITIDA [Order]-TORNOCERATOIDEA [Superfamily]) (FOSSIL)
- Pseudococculina, Genus Pseudococculina M.M. Schepman, 1908 (PSEUDOCOCCULINIDAE)
- PSEUDOCOCCULINIDAE Hickman, 1983 - Family (GASTROPODA-VETIGASTROPODA [Subclass]-LEPETELLOIDEA [Superfamily])
- Pseudocochlespira, Genus Pseudocochlespira Schnetler , 2001 (TURRIDAE) (FOSSIL)
- Pseudocoelatura, Genus Pseudocoelatura Germain, 1921 (UNIONIDAE)
- pseudocoelinae, Conus pseudocoelinae A. Delsaerdt, 1989 - syn of: Virgiconus coelinae (J.C.H. Crosse, 1858) - (CONIDAE)
- pseudocolon, Turricula pseudocolon Giebel † - (CLAVATULIDAE) (FOSSIL)
- pseudocolorata, Monodacna pseudocolorata Büyükmeriç & Wesselingh, 2016 † - (CARDIIDAE) (FOSSIL)
- Pseudocolpomya, Genus Pseudocolpomya Frey, 1998 (MYTILIDA (UNASSIGNED)) (FOSSIL)
- Pseudocolumbarium, Genus Pseudocolumbarium Nielsen, 2003 (MURICIDAE) (FOSSIL)
- Pseudocolumna, Genus Pseudocolumna W.A. Wenz, 1920 (PYRAMIDELLIDAE)
- pseudocoma, Charopa pseudocoma (H.H. Suter, 1894) - (CHAROPIDAE)
- pseudocoma, Egestula pseudocoma H.H. Suter, 1894 - syn of: Charopa pseudocoma (H.H. Suter, 1894) - (CHAROPIDAE)
- Pseudocominella, Genus Pseudocominella Nuttall & J. Cooper, 1973 (NASSARIIDAE) (FOSSIL)
- pseudocommune, Dactylioceras pseudocommune Fucini, 1935 † - (DACTYLIOCERATIDAE) (FOSSIL)
- pseudocompressa, Cymaclymenia pseudocompressa Nikolaeva & Ivanovich, 2005 † - (CYMACLYMENIIDAE) (FOSSIL)
- pseudocompressus, Sinuites pseudocompressus Reed, 1921 † - (SINUITIDAE) (FOSSIL)
- pseudoconcinna, Nassa pseudoconcinna E.A. Smith, 1895 - syn of: Nassarius pseudoconcinnus (E.A. Smith, 1895) - (NASSARIIDAE)
- pseudoconcinna, Rissoina pseudoconcinna G. Nevill, 1885 - syn of: Isseliella mirabilis (H.C. Weinkauff, 1881) - (RISSOINIDAE)
- pseudoconcinna, Isseliella pseudoconcinna G. Nevill, 1885 - syn of: Isseliella mirabilis (H.C. Weinkauff, 1881) - (ZEBINIDAE)
- pseudoconcinnus, Nassarius pseudoconcinnus (E.A. Smith, 1895) - (NASSARIIDAE)
- Pseudoconocardium, Genus Pseudoconocardium Zavodowsky , 1960 (BRANSONIIDAE) (FOSSIL)
- pseudoconoides, Alloteuthis pseudoconoides Dzyuba, 2013 † - (LOLIGINIDAE) (FOSSIL)
- pseudoconoides, Acroteuthis pseudoconoides Dzyuba, 2013 † - (PASSALOTEUTHIDIDAE) (FOSSIL)
- Pseudoconorbis, Genus Pseudoconorbis W.J. Swainson, 1840 (CONIDAE)
- pseudoconvexa, Nerinea pseudoconvexa Stanton, 1947 † - (NERINEIDAE) (FOSSIL)
- pseudocorallinus, Clanculus pseudocorallinus S. Gofas, 1984 - (TROCHIDAE)
- pseudocorallinus thomensis, Clanculus pseudocorallinus thomensis Ilídio & V. Félix-Alves, 1991 - (TROCHIDAE)
- Pseudocorbicula, syn of: Genus Sphaerium J.A. Scopoli, 1777 (SPHAERIIDAE)
- pseudocorbis, Myrtea pseudocorbis (M. Nicklés, 1952) - (LUCINIDAE)
- Pseudocorbula, Genus Pseudocorbula Philippi, 1898 (MYOPHORICARDIIDAE) (FOSSIL)
- pseudocordata, Ringsteadia pseudocordata (C.H. Blake & Hudleston, 1877 †) - (AULACOSTEPHANIDAE) (FOSSIL)
- pseudocordatus, Ammonites pseudocordatus C.H. Blake & Hudleston, 1877 † - syn of: Ringsteadia pseudocordata (C.H. Blake & Hudleston, 1877 †) - (AMMONITIDA (unassigned)) (FOSSIL)
- pseudocordieri, Mangelia pseudocordieri M.A. Peyrot, 1932 † - (MANGELIIDAE) (FOSSIL)
- pseudocornea, Hydrobia pseudocornea Š. Brusina, 1902 † - (HYDROBIIDAE) (FOSSIL)
- pseudocornutum, Hysteroceras pseudocornutum Spath, 1934 † - (BRANCOCERATIDAE) (FOSSIL)
- pseudocoronula, Eumorphoceras pseudocoronula Bisat, 1950 † - (GIRTYOCERATIDAE) (FOSSIL)
- pseudocorrugatum, Ptychocerithium pseudocorrugatum (A.V.M.D. D'Orbigny, 1852 †) - (CERITHIIDAE) (FOSSIL)
- pseudocorticata, Patelloida pseudocorticata T. Iredale, 1908 - syn of: Patelloida corticata (F.W. Hutton, 1880) - (LOTTIIDAE)
- Pseudocosmoceras, Genus Pseudocosmoceras Mourachkine, 1930 (PARKINSONIIDAE) (FOSSIL)
- pseudocosmoi, Lophiotoma pseudocosmoi B.Q. Li & X.Z. Li, 2008 - (TURRIDAE)
- pseudocosta, Eulimella pseudocosta A. Peñas & E. Rolán, 2016 - (PYRAMIDELLIDAE)
- pseudocostata, Melanopsis pseudocostata P. Oppenheim, 1891 † - (MELANOPSIDAE) (FOSSIL)
- Pseudocostatoria, Genus Pseudocostatoria Sinitsyna, 1986 (PRAECARDIOIDEA (UNASSIGNED)) (FOSSIL)
- pseudocostatum, Pleuroceras pseudocostatum (A. Hyatt, 1867 †) - (AMALTHEIDAE) (FOSSIL)
- pseudocostatum, Stantonoceras pseudocostatum Johnson & al., 1964 † - syn of: Placenticeras syrtale (Morton, 1834 †) - (AMMONOIDEA (unassigned)) (FOSSIL)
- pseudocostatum, Paltopleuroceras pseudocostatum Richardson, 1904 † - syn of: Pleuroceras solare (B. Phillips, 1829 †) - (HIPPONICIDAE) (FOSSIL)
- pseudocostellata, Turbonilla pseudocostellata F. Sacco, 1892 † - (PYRAMIDELLIDAE) (FOSSIL)
- pseudocostulatus, Gyraulus pseudocostulatus A.V. Grossu, 1987 - syn of: Gyraulus albus (O.F. Müller, 1774) - (PLANORBIDAE)
- Pseudocraspedites, Subgenus Borealites (Pseudocraspedites) Casey, Mesezhnikov & Schulgina, 1977 (POLYPTYCHITIDAE) (FOSSIL)
- pseudocrassinoda, Pleurofusia pseudocrassinoda P. Lozouet, 2015 † - (TURRIDAE) (FOSSIL)
- pseudocrassissima, Ostrea pseudocrassissima A. Fuchs, 1878 † - (OSTREIDAE) (FOSSIL)
- pseudocrassus, Unio pseudocrassus F. Haas, 1909 - syn of: Unio arcuatus N.R. Bouchard-Chantereaux, 1838 - (UNIONIDAE)
- pseudocrenulata, Arabitrigonia pseudocrenulata (Noetling 1886) † - (PTEROTRIGONIIDAE) (FOSSIL)
- pseudocrenulata, Arabitrigonia pseudocrenulata (Notling, 1884 †) - (PTEROTRIGONIIDAE) (FOSSIL)
- pseudocrenulata, Trigonia pseudocrenulata Notling, 1884 † - syn of: Arabitrigonia pseudocrenulata (Notling, 1884 †) - (TRIGONIIDAE) (FOSSIL)
- Pseudocrioceras, Genus Pseudocrioceras Spath , 1924 (ANCYLOCERATIDAE) (FOSSIL)
- Pseudocrommium, syn of: Subgenus Amaurellina (Pachycrommium) W.P. Woodring, 1928 (AMPULLINIDAE) (FOSSIL)
- pseudocrumena, Cypraecassis pseudocrumena (A.V.M.D. D'Orbigny, 1852 †) - (CASSIDAE) (FOSSIL)
- Pseudocryptaenia, Genus Pseudocryptaenia Koken & Perner, 1925 (EOTOMARIIDAE) (FOSSIL)
- Pseudocryptaulina, Genus Pseudocryptaulina Koken & Perner, 1925 (EOTOMARIIDAE) (FOSSIL)
- pseudoctenostreon, Aviculopecten pseudoctenostreon L. Waagen, 1881 † - (AVICULOPECTINIDAE) (FOSSIL)
- Pseudoctenostreon, Genus Pseudoctenostreon Burckhardt, 1930 (LIMIDAE) (FOSSIL)
- Pseudoctopus, syn of: Genus Paroctopus A. Naef, 1923 (OCTOPODIDAE)
- Pseudocucullaea, Genus Pseudocucullaea Solger, 1903 (CUCULLAEIDAE) (FOSSIL)
- pseudoculatum, Taramelliceras pseudoculatum (Bukowski, 1887 †) - (OPPELIIDAE) (FOSSIL)
- pseudocuneolus, Africonus pseudocuneolus (D. Röckel, E. Rolán & A. Monteiro, 1980) - (CONIDAE)
- pseudocura, Turbonilla pseudocura S. Nomura, 1938 - (PYRAMIDELLIDAE)
- Pseudocuspidaria, Genus Pseudocuspidaria Eames, 1951 (POROMYIDAE) (FOSSIL)
- Pseudocyathodonta, Subgenus Bushia (Pseudocyathodonta) E.V. Coan, 1990 (THRACIIDAE)
- Pseudocycloceras, Genus Pseudocycloceras Barskov, 1959 (SPYROCERATIDAE) (FOSSIL)
- Pseudocyclophorus, Subgenus Cyclotus (Pseudocyclophorus) O.F. von Mφllendorff, 1890 (CYCLOPHORIDAE)
- pseudocyclostomum, Cerion pseudocyclostomum C.G. Aguayo & M.I. Sánchez Roig, 1953 - (CERIONIDAE)
- Pseudocyclotus, Genus Pseudocyclotus K.H.J. Thiele, 1894 (ASSIMINEIDAE)
- pseudocyclus, Ubites pseudocyclus (G.B. Campbell & al., 1983 †) - (ENTOGONITIDAE) (FOSSIL)
- pseudocyclus, Nomismoceras pseudocyclus G.B. Campbell & al., 1983 † - syn of: Ubites pseudocyclus (G.B. Campbell & al., 1983 †) - (EOGONIOLOBOCERATIDAE) (FOSSIL)
- Pseudocymbiola, syn of: Genus Cymbiolacca T. Iredale, 1929 (VOLUTIDAE)
- Pseudocymbites, Genus Pseudocymbites Dommergues & Corna, 2014 (CYMBITIDAE) (FOSSIL)
- Pseudocymia, Genus Pseudocymia Popenoe & Saul, 1987 (PERISSITYIDAE) (FOSSIL)
- Pseudocyphoma, syn of: Genus Cyphoma P.F. Rφding, 1798 (OVULIDAE)
- Pseudocyphoma, syn of: Genus Cyphoma P.F. Rφding, 1798 (OVULIDAE)
- Pseudocypraea, Genus Pseudocypraea F.A. Schilder, 1927 (PEDICULARIIDAE)
- Pseudocyrena, Subgenus Polymesoda (Pseudocyrena) Bourguignat, 1854 (CYRENIDAE)
- Pseudocyrtoceras, Genus Pseudocyrtoceras Schindewolf, 1943 (PSEUDORTHOCERATIDAE) (FOSSIL)
- Pseudocyrtodonta, Genus Pseudocyrtodonta Pfab , 1934 (PSEUDOCYRTODONTIDAE) (FOSSIL)
- PSEUDOCYRTODONTIDAE Maillieux, 1939 - Family (BIVALVIA-PROTOBRANCHIA [Subclass]-NUCULANIDA [Order]-NUCULANOIDEA [Superfamily]) (FOSSIL)
- pseudodacicus, Theodoxus pseudodacicus T.A. Neubauer, M. Harzhauser, E. Georgopoulou, O. Mandic & A. Kroh, † - (NERITIDAE) (FOSSIL)
- Pseudodactylus, syn of: Genus Pseudoliva W.J. Swainson, 1840 (PSEUDOLIVIDAE)
- pseudodanubialis, Theodoxus pseudodanubialis (Sinzov, 1896 †) - (NERITIDAE) (FOSSIL)
- Pseudodanubites, Genus Pseudodanubites Hyatt , 1900 (DANUBITIDAE) (FOSSIL)
- Pseudodaphnella, Genus Pseudodaphnella O. Bφttger, 1895 (RAPHITOMIDAE)
- pseudodeformis, Calyptraea pseudodeformis Baldi, 1966 † - (CALYPTRAEIDAE) (FOSSIL)
- pseudodeluci, Hoplites benettianus pseudodeluci Spath, 1925 † - (HOPLITIDAE) (FOSSIL)
- pseudodemissus, Nassarius pseudodemissus S. Nomura & N. Zinbo, 1935 † - (NASSARIIDAE) (FOSSIL)
- pseudodentifer, Thylacodes arenarius pseudodentifer A.E.M. Cossmann & M.A. Peyrot, 1922 † - (VERMETIDAE) (FOSSIL)
- pseudodesjardini, Marginella pseudodesjardini R. Le Béon, 2012 - (MARGINELLIDAE)
- pseudodesplacei, Porpoceras pseudodesplacei Guex, 1972 † - (DACTYLIOCERATIDAE) (FOSSIL)
- Pseudodexomilus, Genus Pseudodexomilus A. Powell, 1944 (PTYCHATRACTIDAE)
- pseudodezmanianus, Viviparus pseudodezmanianus Lubenescu & Zazuleac, 1985 † - (VIVIPARIDAE) (FOSSIL)
- pseudodiaboli, Tympanotonos pseudodiaboli E.W. Vredenburg, 1928 † - (POTAMIDIDAE) (FOSSIL)
- pseudodiadema, Thais pseudodiadema (M. Yokoyama, 1928) - (MURICIDAE)
- Pseudodiala, Genus Pseudodiala W.F. Ponder, 1967 (BARLEEIIDAE)
- Pseudodianella, Genus Pseudodianella Neubauer, Mandic, Harzhauser & Hrvatovic, 2013 (HYDROBIIDAE) (FOSSIL)
- pseudodiaphana, Vitrea pseudodiaphana É.A.A. Locard, 1882 - syn of: Vitrea subrimata (O.W.H. Reinhardt, 1871) - (PRISTILOMATIDAE)
- Pseudodiartema, Genus Pseudodiartema Gillet, 1921 (CAENOGASTROPODA (UNASSIGNED)) (FOSSIL)
- Pseudodicoelites, Genus Pseudodicoelites Sachs & Naljaeva, 1967 (PSEUDODICOELITIDAE) (FOSSIL)
- PSEUDODICOELITIDAE Sachs & Naljaeva, 1967 - Family (CEPHALOPODA-COLEOIDEA [Subclass]-BELEMNITIDA [Order]) (FOSSIL)
- Pseudodicyathifer, syn of: Genus Dicyathifer T. Iredale, 1932 (TEREDINIDAE)
- Pseudodidymotis, Genus Pseudodidymotis Gillet, 1924 (PTERIIDA (UNASSIGNED)) (FOSSIL)
- pseudodigitalina, Ostrea pseudodigitalina A. Fuchs, 1879 † - (OSTREIDAE) (FOSSIL)
- pseudodilectum, Protogrammoceras pseudodilectum Dommergues & al., 1985 † - (HILDOCERATIDAE) (FOSSIL)
- Pseudodiloma, syn of: Genus Gibbula Risso, 1826 (TROCHIDAE) (FOSSIL)
- pseudodiluviana, ousseaumea pseudodiluviana Schilder, 1927 † - syn of: Jousseaumea diluviana (Gray, 1824 †) - (CYPRAEIDAE) (FOSSIL)
- pseudodimidiata, Pyrgula pseudodimidiata (W. Dybowski & J.G. Grochmalicki, 1915) - (HYDROBIIDAE)
- pseudodiscrepans, Glyphiolobus pseudodiscrepans (Moore, 1939 †) - (DIMORPHOCERATIDAE) (FOSSIL)
- pseudodiscreta, Rissoina pseudodiscreta P. Oppenheim, 1900 † - (RISSOINIDAE) (FOSSIL)
- Pseudodistes, Genus Pseudodistes Stanisic & Potter, 2010 (CAMAENIDAE)
- pseudoditropida, Staja pseudoditropida E. Jekelius, 1944 † - (HYDROBIIDAE) (FOSSIL)
- pseudodochii, Liburnica pseudodochii P. Subai, 2012 - (HELICIDAE)
- pseudodolium, Orcula pseudodolium A.J. Wagner, 1912 - (ORCULIDAE)
- pseudodon, Opeatostoma pseudodon (E.J. Burrow, 1815) - (FASCIOLARIIDAE)
- Pseudodon, Genus Pseudodon A. Gould, 1844 (UNIONIDAE)
- pseudodonacialis, Bertinella pseudodonacialis (A.V.M.D. D'Orbigny, 1850 †) - (TELLINIDAE) (FOSSIL)
- pseudodonta, Ashmunella pseudodonta (W.H. Dall, 1897) - (POLYGYRIDAE)
- Pseudodontoideus, syn of: Genus Strophitus C.S. Rafinesque, 1820 (UNIONIDAE)
- Pseudodontopsis, Subgenus Leguminaia (Pseudodontopsis) W. Kobelt, 1913 (UNIONIDAE)
- pseudodopsis, Anodonta pseudodopsis É.A.A. Locard, 1883 - (UNIONIDAE)
- Pseudodopsis, syn of: Subgenus Leguminaia (Pseudodontopsis) W. Kobelt, 1913 (UNIONIDAE)
- pseudodoris, Platydoris pseudodoris N.R. Bouchard-Chantereaux, 1835 - syn of: Platydoris argo (C. Linnaeus, 1767) - (DISCODORIDIDAE)
- Pseudodostia, Genus Pseudodostia Symonds, 2006 (NERITIDAE) (FOSSIL)
- pseudodrillia, Cryptodaphne pseudodrillia Powell, 1942 † - (RAPHITOMIDAE) (FOSSIL)
- pseudodubari, Polymorphites pseudodubari Meister, 1986 † - (POLYMORPHITIDAE) (FOSSIL)
- Pseudodus, syn of: Genus Pseudodon A. Gould, 1844 (UNIONIDAE)
- Pseudoduvalia, Genus Pseudoduvalia Naef, 1922 (DUVALIIDAE) (FOSSIL)
- pseudoeburnea, Chesaclava pseudoeburnea (A. Heilprin, 1887 †) - (TURRIDAE) (FOSSIL)
- pseudoechinatus, Cryptaulax pseudoechinatus Gerasimov, 1955 † - (CRYPTAULACIDAE) (FOSSIL)
- pseudoecho, Darioconus pennaceus pseudoecho (L. Bozzetti, 2013) - (CONIDAE)
- pseudoelegans, Anisoceras pseudoelegans Pictet & Campiche, 1861 † - (ANISOCERATIDAE) (FOSSIL)
- pseudoelegans, Cymatoceras pseudoelegans (A.V.M.D. D'Orbigny, 1841 †) - (CYMATOCERATIDAE) (FOSSIL)
- pseudoelegans, Eleganticeras pseudoelegans Buckman, 1913 † - syn of: Eleganticeras elegantulum A.T. Young & Bird, 1828 † - (HILDOCERATIDAE) (FOSSIL)
- pseudoelegans, Pseudohelicoceras pseudoelegans (Spath 1936 †) - (TURRILITIDAE) (FOSSIL)
- pseudoelegans, Turritella pseudoelegans A.E.M. Cossmann, 1923 † - (TURRITELLIDAE) (FOSSIL)
- pseudoelisae, Genota pseudoelisae B.M. Landau & al., 2013 † - (BORSONIIDAE) (FOSSIL)
- pseudoelongatus, Trophon pseudoelongatus H. Strebel, 1904 - syn of: Xymenopsis muriciformis (P.P. King, 1832) - (MURICIDAE)
- Pseudoemilites, Genus Pseudoemilites Leonova , 1988 (ADRIANITIDAE) (FOSSIL)
- pseudoena, Paracerastus pseudoena E. Neubert & D. Van Damme, 2012 † - (CERASTUIDAE) (FOSSIL)
- pseudoenhalia, Cernuella pseudoenhalia J.R. Bourguignat, 1860 - syn of: Cernuella virgata (E.M. Da Costa, 1778) - (HYGROMIIDAE)
- pseudoentalis, Dentalium pseudoentalis O.G. Costa, 1850 - syn of: Antalis panorma (J.C. Chenu, 1843) - (DENTALIIDAE)
- pseudoepiglottina, Cochlis pseudoepiglottina (E. Sismonda, 1847 †) - (NATICIDAE) (FOSSIL)
- pseudoequatoria, Anatoma pseudoequatoria (E.A. Kay, 1979) - (ANATOMIDAE)
- pseudoequatoria, Scissurella pseudoequatoria E.A. Kay, 1979 - syn of: Anatoma pseudoequatoria (E.A. Kay, 1979) - (SCISSURELLIDAE)
- pseudoerbaensis, Denckmannia pseudoerbaensis Gabilly, 1976 † - syn of: Phymatoceras pseuderbaensis Gabilly, 1976 † - (PHYMATOCERATIDAE) (FOSSIL)
- pseudoernesti, Holcophylloceras pseudoernesti M. Collignon, 1937 † - (PHYLLOCERATIDAE) (FOSSIL)
- pseudoescalaris, Opalia pseudoescalaris (J.C. Melvill & R. Standen, 1901) - (EPITONIIDAE)
- Pseudoetrema, Genus Pseudoetrema K. Oyama, 1953 (CLATHURELLIDAE)
- Pseudoeuchasma, Genus Pseudoeuchasma Kobayashi , 1933 (ISCHYRINIIDAE) (FOSSIL)
- pseudoeuglyphus, Ptychites pseudoeuglyphus Konstantinov, 1991 † - (PTYCHITIDAE) (FOSSIL)
- Pseudoeuryptychites, Subgenus Siberiptychites (Pseudoeuryptychites) Pavlov, 1914 (POLYPTYCHITIDAE) (FOSSIL)
- pseudoexcentrica, Lycettitrigonia pseudoexcentrica (Hoppe, 1922 †) - (RUTITRIGONIIDAE) (FOSSIL)
- pseudoexcentrica, Trigonia pseudoexcentrica Hoppe, 1922 † - syn of: Lycettitrigonia pseudoexcentrica (Hoppe, 1922 †) - (TRIGONIIDAE) (FOSSIL)
- pseudoexigua, Nucula pseudoexigua M. de H. Villarroel & J. Stuardo, 1998 - (NUCULIDAE)
- pseudoexilis, Bela pseudoexilis G. Della Bella, Naldi & Scarponi, 2015 - (MANGELIIDAE)
- pseudofaba, Glabella pseudofaba (G.B. II Sowerby, 1846) - (MARGINELLIDAE)
- pseudofaba, Marginella pseudofaba G.B. II Sowerby, 1846 - syn of: Glabella pseudofaba (G.B. II Sowerby, 1846) - (MARGINELLIDAE)
- pseudofaba imperatrix, Glabella pseudofaba imperatrix E.R. Sykes, 1905 - (MARGINELLIDAE)
- Pseudofagotia, Genus Pseudofagotia Anistratenko, 1993 (MELANOPSIDAE) (FOSSIL)
- pseudofalcatum, Terasceras pseudofalcatum van Hoepen, 1944 † - syn of: Hysteroceras subbinum Spath, 1934 † - (BRANCOCERATIDAE) (FOSSIL)
- pseudofallax, Montenegrina pseudofallax (H. Nordsieck, 1972) - (CLAUSILIIDAE)
- pseudofallax, Melanopsis pseudofallax F. Sacco, 1895 - syn of: Melanopsis praemorsa (C. Linnaeus, 1758) - (MELANOPSIDAE)
- pseudofallax, Macoma pseudofallax R. von Cosel, 1995 - (TELLINIDAE)
- pseudofasciatum, Loxonema pseudofasciatum J. Donald, 1905 † - (LOXONEMATIDAE) (FOSSIL)
- pseudofastigiata, Lioconcha fastigiata pseudofastigiata K.L. Lamprell & J.M. Healy, 2002 - (VENERIDAE)
- pseudofastosum, Clinocardium pseudofastosum (S. Nomura, 1937 †) - (CARDIIDAE) (FOSSIL)
- Pseudofaunus, Subgenus Faunus (Pseudofaunus) Olsson, 1931 (PACHYCHILIDAE) (FOSSIL)
- Pseudofavrella, Genus Pseudofavrella Leanza & Leanza, 1973 (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- Pseudofax, Genus Pseudofax Finlay & Marwick, 1937 (BUCCINIDAE) (FOSSIL)
- pseudoferghanica, Ponsadenia pseudoferghanica (A.A. Schileyko, 1978) - (BRADYBAENIDAE)
- pseudoferruginea, Durotrigensia pseudoferruginea (Nicolesco, 1927 †) - (PARKINSONIIDAE) (FOSSIL)
- pseudoferussaci, Melanopsis pseudoferussaci P.M. Pallary, 1899 - (MELANOPSIDAE)
- pseudoferussaci minor, Melanopsis pseudoferussaci minor P.M. Pallary, 1920 - (MELANOPSIDAE)
- pseudoferussaci vaucheri, Melanopsis pseudoferussaci vaucheri P.M. Pallary, 1899 - (MELANOPSIDAE)
- Pseudofidelites, Genus Pseudofidelites Klug , 2002 (AGONIATITIDAE) (FOSSIL)
- pseudofieldingii, Fieldingiceras pseudofieldingii Fucini, 1904 † - (HILDOCERATIDAE) (FOSSIL)
- Pseudofigulina, syn of: Genus Pelasga P. Hesse, 1908 (HELICIDAE)
- pseudofissura, Dentalium pseudofissura Janssen, 1978 † - (DENTALIIDAE) (FOSSIL)
- Pseudofissurella, Genus Pseudofissurella Haber, 1932 (FISSURELLIDAE) (FOSSIL)
- pseudoflavus, Limax pseudoflavus J. Evans, 1978 - (LIMACIDAE)
- Pseudoflemingites, Genus Pseudoflemingites Smyshlyaeva & Zakharov, 2015 (FLEMINGITIDAE) (FOSSIL)
- pseudoflexuosa, Clymenia pseudoflexuosa Rzehak, 1910 † - syn of: Platyclymenia subnautilina (C.L.F. von Sandberger, 1855 †) - (CLYMENIIDAE) (FOSSIL)
- pseudoflexuosa, Platyclymenia pseudoflexuosa Rzehak, 1910 † - syn of: Platyclymenia subnautilina (C.L.F. von Sandberger, 1855 †) - (PLATYCLYMENIIDAE) (FOSSIL)
- pseudoflexuosum, Taramelliceras pseudoflexuosum (J. Favre, 1877 †) - (OPPELIIDAE) (FOSSIL)
- pseudofluviatilis, Theodoxus pseudofluviatilis É.A.A. Locard, 1893 † - (NERITIDAE) (FOSSIL)
- pseudofolinella, Parthenina pseudofolinella Peñas & Rolán, 2017 - (PYRAMIDELLIDAE)
- Pseudofoordites, Genus Pseudofoordites Bogoslovsky , 1959 (PINACITIDAE) (FOSSIL)
- pseudofortunei, Clathroterebra pseudofortunei (U. Aubry, 2008) - (TEREBRIDAE)
- pseudofortunei, Terebra pseudofortunei U. Aubry, 2008 - syn of: Clathroterebra pseudofortunei (U. Aubry, 2008) - (TEREBRIDAE)
- pseudofossile, Keenocardium pseudofossile L.A. Reeve, 1845 - syn of: Keenocardium californiense (G.P. Deshayes, 1839) - (CARDIIDAE)
- pseudofraudigera, Bulgarica pseudofraudigera H. Nordsieck, 1973 - (CLAUSILIIDAE)
- pseudofuchsi, Grandinenia pseudofuchsi H. Nordsieck, 2007 - (CLAUSILIIDAE)
- pseudofuchsi, Orcula austriaca pseudofuchsi M. Klemm, 1967 - (ORCULIDAE)
- pseudofuchsi nigrofasciata, Grandinenia pseudofuchsi nigrofasciata H. Nordsieck, 2012 - (CLAUSILIIDAE)
- pseudofuchsi remota, Grandinenia pseudofuchsi remota H. Nordsieck, 2012 - (CLAUSILIIDAE)
- pseudofuchsi varicolor, Grandinenia pseudofuchsi varicolor H. Nordsieck, 2012 - (CLAUSILIIDAE)
- Pseudofulgur, Genus Pseudofulgur MacNeil, 1984 (NEOGASTROPODA (UNASSIGNED)) (FOSSIL)
- Pseudofulvia, Genus Pseudofulvia E. Vidal & L. Kirkendale, 2007 (CARDIIDAE)
- pseudofuniculata, Hologyra pseudofuniculata E.A.L. Kittl, 1899 † - (NATICOPSIDAE) (FOSSIL)
- pseudofusca, Kentrodoris pseudofusca J.J. Risbec, 1928 - syn of: Platydoris ellioti (J. Alder & A. Hancock, 1864) - (DISCODORIDIDAE)
- Pseudofusia, Genus Pseudofusia Shuto, 1969 (OPISTHOBRANCHIA (UNASSIGNED)) (FOSSIL)
- pseudofusiformis, Odontocymbiola pseudofusiformis F. Lahille, 1895 - syn of: Odontocymbiola magellanica subnodosa (W.E. Leach, 1814) - (VOLUTIDAE)
- pseudofusinus, Afer pseudofusinus K. Fraussen & R. Hadorn, 2000 - (BUCCINIDAE)
- PseudoFusinus, syn of: Genus Fusinus C.S. Rafinesque, 1815 (FASCIOLARIIDAE)
- pseudofusoides, Drymaeus pseudofusoides S.I. Da Costa, 1906 - (BULIMULIDAE)
- Pseudofusulus, Genus Pseudofusulus H. Nordsieck, 1977 (CLAUSILIIDAE)
- pseudofusus, Pusionella pseudofusus (C. des Moulins, 1842 †) - (CLAVATULIDAE) (FOSSIL)
- Pseudofusus, syn of: Genus Fusinus C.S. Rafinesque, 1815 (FASCIOLARIIDAE)
- pseudofusus, Pleurotoma pseudofusus C. des Moulins, 1842 † - syn of: Pusionella pseudofusus (C. des Moulins, 1842 †) - (TURRIDAE) (FOSSIL)
- pseudofusus palatinus, Pusionella pseudofusus palatinus Strausz, 1954 † - (CLAVATULIDAE) (FOSSIL)
- Pseudogalba, syn of: Genus Galba F. von P. Schrank, 1803 (LYMNAEIDAE)
- pseudogaleatus, Arcestes pseudogaleatus Mojsisovics, 1875 † - (ARCESTIDAE) (FOSSIL)
- Pseudogaleodea, Genus Pseudogaleodea Nagao, 1932 (FICIDAE) (FOSSIL)
- Pseudogaleomma, Genus Pseudogaleomma T. Habe, 1964 (GALEOMMATIDAE)
- Pseudogarantiana, Subgenus Garantiana (Pseudogarantiana) Bentz, 1928 (PARKINSONIIDAE) (FOSSIL)
- pseudogardeni, Ammonites pseudogardeni F. Schlüter, 1872 † - syn of: Hauericeras pseudogardeni (F. Schlüter, 1872 †) - (AMMONITIDA (unassigned)) (FOSSIL)
- pseudogardeni, Hauericeras pseudogardeni (F. Schlüter, 1872 †) - (DESMOCERATIDAE) (FOSSIL)
- Pseudogargasiceras, Subgenus Gargasiceras (Pseudogargasiceras) Collignon, 1962 (DESHAYESITIDAE) (FOSSIL)
- Pseudogarnieria, Subgenus Delphinites (Pseudogarnieria) Alsen & Rawson, 2005 (NEOCOMITIDAE) (FOSSIL)
- Pseudogastrioceras, Genus Pseudogastrioceras Spath , 1936 (PARAGASTRIOCERATIDAE) (FOSSIL)
- Pseudogastroplites, Genus Pseudogastroplites Jeletzky , 1980 (HOPLITIDAE) (FOSSIL)
- pseudogasulli, Gasullia pseudogasulli J. Arrébola, C.E. Prieto, A. Puente & A. Ruiz, 2006 - syn of: Hatumia pseudogasulli (J. Arrébola, C.E. Prieto, A. Puente & A. Ruiz, 2006) - (HELICODONTIDAE)
- pseudogasulli, Hatumia pseudogasulli (J. Arrébola, C.E. Prieto, A. Puente & A. Ruiz, 2006) - (TRISSEXODONTIDAE)
- pseudogaultinum, Polyptychoceras pseudogaultinum (Yokoyama, 1890 †) - (DIPLOMOCERATIDAE) (FOSSIL)
- pseudogemma, Miralda pseudogemma Peñas & Rolán, 2017 - (PYRAMIDELLIDAE)
- pseudogermanicus, Oxyteuthis pseudogermanicus Mutterlose, 1983 † - (OXYTEUTHIDIDAE) (FOSSIL)
- Pseudogibbula, Genus Pseudogibbula P. Dautzenberg, 1890 (ASSIMINEIDAE) (FOSSIL)
- pseudogigas, Trophonites pseudogigas Blake † - (MOLLUSCA INCERTAE SEDIS) (FOSSIL)
- pseudogilva, Hemitrochus pseudogilva C. de la Torre - (CEPOLIDAE)
- pseudoglaber, Callihoplites pseudoglaber Spath, 1928 † - (HOPLITIDAE) (FOSSIL)
- pseudoglabra, Melanella pseudoglabra (P. Dautzenberg & H. Fischer, 1912) - (EULIMIDAE)
- Pseudoglandina, syn of: Subgenus Simpulopsis (Eudioptus) J.A. Albers, 1860 (SIMPULOPSIDAE)
- Pseudoglaphyrites, syn of: Genus Syngastrioceras Librovitch , 1938 (GLAPHYRITIDAE) (FOSSIL)
- Pseudoglauconia, Genus Pseudoglauconia DouvillΓΒ©, 1921 (CASSIOPIDAE) (FOSSIL)
- Pseudoglessula, Genus Pseudoglessula O. Bφttger, 1892 (SUBULINIDAE)
- pseudoglobosa, Retusa pseudoglobosa S. Nomura, 1939 - (RETUSIDAE)
- pseudoglobosa, Diplodonta pseudoglobosa R.N. Kilburn, 1996 - (UNGULINIDAE)
- pseudoglobula, Helix pseudoglobula A. Mousson, 1873 - syn of: Harmozica pisiformis (L. Pfeiffer, 1852) - (HELICIDAE)
- pseudoglobula, Bania pseudoglobula (A.V.M.D. D'Orbigny, 1852 †) - (HYDROBIIDAE) (FOSSIL)
- pseudoglobula normalis, Bania pseudoglobula normalis (F. Gottschick, 1921 †) - (HYDROBIIDAE) (FOSSIL)
- pseudoglobula steinheimensis, Bania pseudoglobula steinheimensis (Miller, 1900 †) - (HYDROBIIDAE) (FOSSIL)
- Pseudoglomus, Genus Pseudoglomus W.H. Dall, 1898 (MALLETIIDAE)
- pseudogloriosus, Leptochiton pseudogloriosus H.L. Strack, 1991 - (LEPTOCHITONIDAE)
- Pseudogomphoceras, Genus Pseudogomphoceras Flower, 1957 (MANDALOCERATIDAE) (FOSSIL)
- Pseudogonaxis, Subgenus Tayloria (Pseudogonaxis) K.H.J. Thiele, 1932 (STREPTAXIDAE)
- pseudogoniatites, Clymenia pseudogoniatites C.L.F. von Sandberger, 1853 † - syn of: Pseudoclymenia pseudogoniatites (C.L.F. von Sandberger, 1853 †) - (CLYMENIIDAE) (FOSSIL)
- pseudogoniatites, Pseudoclymenia pseudogoniatites (C.L.F. von Sandberger, 1853 †) - (PSEUDOCLYMENIIDAE) (FOSSIL)
- Pseudogracilinenia, Genus Pseudogracilinenia F.E. Loosjes, 1984 (CLAUSILIIDAE)
- pseudogracilis, Phenacovolva pseudogracilis C.N. Cate & M. Azuma in C.N. Cate, 1973 - (OVULIDAE)
- pseudogracilis, Viviparus pseudogracilis Strausz, 1942 † - (VIVIPARIDAE) (FOSSIL)
- pseudogradata, Turritella pseudogradata A.E.M. Cossmann & M.A. Peyrot, 1921 † - (TURRITELLIDAE) (FOSSIL)
- Pseudogrammatodon, syn of: Genus Porterius B.L. Clark, 1925 (PARALLELODONTIDAE)
- Pseudogrammatodon, syn of: Genus Porterius B.L. Clark, 1925 (PARALLELODONTIDAE)
- pseudogramme, Diplommatina pseudogramme A.R.J.B. Bavay & P. Dautzenberg - (DIPLOMMATINIDAE)
- Pseudogrammoceras, Genus Pseudogrammoceras Buckman, 1890 (HILDOCERATIDAE) (FOSSIL)
- pseudogranosa, Gemmula pseudogranosa (S. Nomura, 1940) - (TURRIDAE)
- pseudogranulina, Plesiocystiscus pseudogranulina M. Lussi & G. Smith, 1998 - (CYSTISCIDAE)
- pseudogranulosus, Perotrochus pseudogranulosus P. Anseeuw, N. Puillandre, Utge & P. Bouchet, 2015 - (PLEUROTOMARIIDAE)
- Pseudographis, syn of: Genus Kejdonia C. Mifsud, 1999 (PYRAMIDELLIDAE)
- Pseudographoceras, syn of: Genus Ludwigia Bayle, 1878 (GRAPHOCERATIDAE) (FOSSIL)
- pseudograta, Turritella pseudograta A.E.M. Cossmann & M.A. Peyrot, 1921 † - (TURRITELLIDAE) (FOSSIL)
- pseudograteloupanus, Theodoxus pseudograteloupanus (Sinzov, 1884 †) - (NERITIDAE) (FOSSIL)
- Pseudogravesia, Genus Pseudogravesia Hantzpergue, 1987 (PERISPHINCTIDAE) (FOSSIL)
- pseudogravinae, Jujubinus pseudogravinae F. Nordsieck, 1973 - syn of: Jujubinus gravinae (P. Dautzenberg, 1881) - (TROCHIDAE)
- pseudogregaria, Pseudocorbula pseudogregaria Kurushin, 1992 † - (MYOPHORICARDIIDAE) (FOSSIL)
- Pseudogregoryceras, Genus Pseudogregoryceras Jeannet , 1951 (ASPIDOCERATIDAE) (FOSSIL)
- Pseudogrippina, Genus Pseudogrippina B.A. Marshall, 2002 (CUSPIDARIIDAE)
- pseudogrossouvrei, Eupachydiscus pseudogrossouvrei M. Collignon, 1955 † - (PACHYDISCIDAE) (FOSSIL)
- pseudogruneri, Nejdia pseudogruneri Thevenin, 1908 † - (HILDOCERATIDAE) (FOSSIL)
- pseudogrunowi, Podagrosites pseudogrunowi Guex, 1975 † - (HILDOCERATIDAE) (FOSSIL)
- pseudoguerini, Rissoa pseudoguerini (F. Nordsieck & F.F. Talavera, 1979) - (RISSOIDAE)
- pseudogularis, Orcula dolium pseudogularis A.J. Wagner, 1912 - (ORCULIDAE)
- Pseudoguppya, Subgenus Habroconus (Pseudoguppya) F.C. Baker, 1925 (EUCONULIDAE)
- Pseudogyra, Genus Pseudogyra Mirkamalov, 1971 (PTERIIDA (UNASSIGNED)) (FOSSIL)
- pseudogyra, Papyrotheca pseudogyra Š. Brusina, 1893 † - (SUCCINEIDAE) (FOSSIL)
- pseudohaitensis, Strombina pseudohaitensis C.J. Maury, 1917 † - (COLUMBELLIDAE) (FOSSIL)
- pseudohalmyris, Helix pseudohalmyris E. Caziot, 1902 - syn of: Marmorana serpentina isarae (M. Paulucci, 1882) - (HELICIDAE)
- Pseudohalorites, Genus Pseudohalorites Yabe , 1928 (PSEUDOHALORITIDAE) (FOSSIL)
- PSEUDOHALORITIDAE Ruzhencev, 1957 - Family (CEPHALOPODA-AMMONOIDEA [Subclass]-GONIATITIDA [Order]-PSEUDOHALORITOIDEA [Superfamily]) (FOSSIL)
- Pseudohaploceras, Genus Pseudohaploceras Hyatt , 1900 (DESMOCERATIDAE) (FOSSIL)
- pseudohara, Schizophyllites pseudohara Renz & Renz, 1948 † - syn of: Proptychitoides trigonalis (Arthaber, 1911 †) - (MEEKOCERATIDAE) (FOSSIL)
- pseudohara, Monophyllites pseudohara Mojsisovics 1879 † - (USSURITIDAE) (FOSSIL)
- Pseudoharpoceras, Genus Pseudoharpoceras Waagen , 1895 (COLUMBITIDAE) (FOSSIL)
- pseudohastata, Chlamys pseudohastata V.N. Sinelnikova, 1975 † - (PECTINIDAE) (FOSSIL)
- Pseudohastites, Genus Pseudohastites Lang, 1928 (PASSALOTEUTHIDIDAE) (FOSSIL)
- pseudohauthalli, Turritella pseudohauthalli Rossi de Garcia & J.L. Levy, 1977 † - (TURRITELLIDAE) (FOSSIL)
- Pseudohedenstroemia, syn of: Genus Hedenstroemia Renz & Renz, 1948 (LANCEOLITIDAE) (FOSSIL)
- Pseudohelenoconcha, Subgenus Ptychodon (Pseudohelenoconcha) J. Germain, 1932 (CHAROPIDAE)
- Pseudohelicina, syn of: Genus Bourciera L. Pfeiffer, 1852 (HELICINIDAE)
- Pseudohelicoceras, Genus Pseudohelicoceras Spath, 1921 (TURRILITIDAE) (FOSSIL)
- Pseudoheligmus, Genus Pseudoheligmus Douvillι, 1904 (PTERIIDA (UNASSIGNED)) (FOSSIL)
- Pseudohemiphaedusa, Subgenus Juttingia (Pseudohemiphaedusa) H. Nordsieck, 2002 (CLAUSILIIDAE)
- Pseudohercynella, Genus Pseudohercynella Kaunhowen, 1898 (HYGROPHILA (UNASSIGNED)) (FOSSIL)
- pseudoheres, Conobelus pseudoheres Lukeneder, 2005 † - (DIMITOBELIDAE) (FOSSIL)
- Pseudohermes, Genus Pseudohermes J.K. Tucker & M.J. Tenorio, 2013 (CONIDAE)
- pseudohiemalis, Tosapecten pseudohiemalis T. Kobayashi & M. Ichikawa, 1949 † - (TOSAPECTINIDAE) (FOSSIL)
- pseudohiemalis mabarus, Tosapecten pseudohiemalis mabarus T. Kobayashi & M. Ichikawa, 1949 † - (TOSAPECTINIDAE) (FOSSIL)
- pseudohillsi, Ancylotropaeum pseudohillsi (T.L. Casey, 1980 †) - (ANCYLOCERATIDAE) (FOSSIL)
- pseudohimilis, Austrodrillia pseudohimilis S. Nomura, 1935 - (HORAICLAVIDAE)
- Pseudohinnites, Genus Pseudohinnites H.H. Dijkstra, 1989 (PECTINIDAE)
- pseudohippocastanum, Purpura pseudohippocastanum P. Dautzenberg, 1929 - syn of: Thalessa virgata (L.W. Dillwyn, 1817) - (MURICIDAE)
- pseudohirundo, Cypraea pseudohirundo Orbigny, 1852 † - (CYPRAEIDAE) (FOSSIL)
- pseudohispidula, Alvania pseudohispidula M.M. Brunetti & G. Vecchi, 2012 † - (RISSOIDAE) (FOSSIL)
- Pseudohollandites, Genus Pseudohollandites Krystyn & Tatzreiter, 1991 (BEYRICHITIDAE) (FOSSIL)
- Pseudohoratia, Genus Pseudohoratia P. Radoman, 1967 (HYDROBIIDAE)
- pseudohumilis, Cymatosyrinx pseudohumilis (S. Nomura †) - (DRILLIIDAE) (FOSSIL)
- pseudohungerfordi, Compressidentalium pseudohungerfordi (B. Sahlmann, van der Beek & V. Wiese, 2016) - (DENTALIIDAE)
- pseudohyalina, Cycloscala pseudohyalina M.E.A. de Boury, MS - syn of: Cycloscala crenulata (W.H. Pease, 1867) - (EPITONIIDAE)
- pseudohyalina, Epitonium pseudohyalina M.E.A. de Boury, MS - syn of: Cycloscala crenulata (W.H. Pease, 1867) - (EPITONIIDAE)
- Pseudohyalina, Subgenus Striatura (Pseudohyalina) E.S. Morse, 1864 (GASTRODONTIDAE)
- Pseudohyalus, Subgenus Zonitoides (Pseudohyalus) F.C. Baker, 1929 (GASTRODONTIDAE)
- pseudohyatti, Mantelliceras pseudohyatti M. Collignon, 1964 † - syn of: Mantelliceras dixoni Spath, 1926 † - (ACANTHOCERATIDAE) (FOSSIL)
- pseudohydatinus, Mediterranea pseudohydatinus J.R. Bourguignat, 1853 - syn of: Mediterranea hydatina (E.A. Rossmässler, 1838) - (OXYCHILIDAE)
- Pseudohyria, Genus Pseudohyria Morris, 1936 (PSEUDOHYRIIDAE) (FOSSIL)
- PSEUDOHYRIIDAE Kobayashi, 1968 - Family (BIVALVIA-PALAEOHETERODONTA [Subclass]-TRIGONIIDA [Order]-TRIGONIOIDOIDEA [Superfamily]) (FOSSIL)
- pseudohystrix, Clathurella pseudohystrix E.R. Sykes, 1906 - syn of: Raphitoma pseudohystrix (E.R. Sykes, 1906) - (CLATHURELLIDAE)
- pseudohystrix, Raphitoma pseudohystrix (E.R. Sykes, 1906) - (RAPHITOMIDAE)
- Pseudoilbia, Genus Pseudoilbia M.C. Miller & W.B. Rudman, 1968 (RUNCINIDAE)
- pseudoillota, Fugleria pseudoillota (N.W. Reinhart, 1937) - (ARCIDAE)
- pseudoillyrica, Lindbergia pseudoillyrica F. Riedel, 1960 - (PRISTILOMATIDAE)
- pseudoimbricatum, Eushantungoceras pseudoimbricatum (Barrande, 1870 †) - (ARMENOCERATIDAE) (FOSSIL)
- pseudoimpressa, Melanopsis fossilis pseudoimpressa Papp, 1953 † - (MELANOPSIDAE) (FOSSIL)
- pseudoindica, Turanigonia pseudoindica (Arkhanguelsky, 1916 †) - (RUTITRIGONIIDAE) (FOSSIL)
- pseudoindica, Trigonia pseudoindica Arkhanguelsky, 1916 † - syn of: Turanigonia pseudoindica (Arkhanguelsky, 1916 †) - (TRIGONIIDAE) (FOSSIL)
- Pseudoinquisitor, Genus Pseudoinquisitor Powell, 1942 (TURRIDAE) (FOSSIL)
- pseudointerrupta, Clavatula pseudointerrupta M.A. Peyrot, 1931 † - (CLAVATULIDAE) (FOSSIL)
- Pseudoinvoluticeras, Genus Pseudoinvoluticeras Collignon, 1960 (PERISPHINCTIDAE) (FOSSIL)
- pseudoiostomus, Thaumastus pseudoiostomus P. von Ströbel, 1909 - (MEGASPIRIDAE)
- Pseudoirus, syn of: Genus Petricola J.B.P.A. Lamarck, 1801 (VENERIDAE)
- Pseudoischnochiton, Genus Pseudoischnochiton Ashby, 1930 (LEPTOCHITONIDAE) (FOSSIL)
- Pseudoislamia, Genus Pseudoislamia P. Radoman, 1979 (HYDROBIIDAE)
- Pseudojacobites, Genus Pseudojacobites Spath, 1922 (PACHYDISCIDAE) (FOSSIL)
- pseudojacosta, Trochoidea pseudojacosta L. Forcart, 1976 - (HYGROMIIDAE)
- Pseudojaminia, Genus Pseudojaminia Pαll-Gergely & Bank, 2016 (ENIDAE)
- pseudojaspideus, Conus pseudojaspideus G.W. Nowell-Usticke, 1968 - syn of: Conasprella jaspidea pealii (J. Green, 1830) - (CONIDAE)
- pseudojavana, Turricula pseudojavana (A.V.M.D. D'Orbigny, 1852 †) - (CLAVATULIDAE) (FOSSIL)
- pseudojavana, Liardetia pseudojavana W.J.M. Maassen, 2000 - (EUCONULIDAE)
- Pseudojerdonia, Subgenus Cyathopoma (Pseudojerdonia) W. Kobelt, 1902 (CYCLOPHORIDAE)
- Pseudokaliella, Genus Pseudokaliella H.H. Godwin-Austen, 1910 (HELICARIONIDAE)
- Pseudokatroliceras, Genus Pseudokatroliceras (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- pseudokatsuae, Palmulacypraea musumea pseudokatsuae unknown - (CYPRAEIDAE)
- Pseudokellia, syn of: Genus Pseudokellya J.P.L. Pelseneer, 1903 (KELLIIDAE)
- Pseudokellya, Genus Pseudokellya J.P.L. Pelseneer, 1903 (KELLIIDAE)
- Pseudokeyserlingites, Genus Pseudokeyserlingites Bucher , 1989 (SIBIRITIDAE) (FOSSIL)
- pseudokimioi, Conasprella pseudokimioi (A.J. Da Motta & P. Martin, 1982) - (CONIDAE)
- pseudokimioi, Continuconus pseudokimioi (A.J. Da Motta & P. Martin, 1982) - syn of: Conasprella pseudokimioi (A.J. Da Motta & P. Martin, 1982) - (CONIDAE)
- Pseudokionoceras, Genus Pseudokionoceras Zhuravleva, 1978 (ORTHOCERIDA (UNASSIGNED)) (FOSSIL)
- Pseudokossmaticeras, Genus Pseudokossmaticeras Spath , 1922 (KOSSMATICERATIDAE) (FOSSIL)
- pseudokranaus, Subvinalesphinctes pseudokranaus Parent & al., 2006 † - (PERISPHINCTIDAE) (FOSSIL)
- Pseudokymatites, Genus Pseudokymatites Spath, 1934 (PROPTYCHITIDAE) (FOSSIL)
- pseudolabium, Papuina pseudolabium (L. Pfeiffer, 1868) - (CAMAENIDAE)
- pseudolabratula, Agathotoma pseudolabratula P. Lozouet, 2015 - (MANGELIIDAE)
- Pseudolacuna, Genus Pseudolacuna Bφttger, 1878 (CAENOGASTROPODA (UNASSIGNED)) (FOSSIL)
- pseudolacustris, Acroloxus pseudolacustris P. Glöer & V.M. Pešic, 2012 - (ACROLOXIDAE)
- pseudolamarcki, Pteropurpura pseudolamarcki Magne, 1941 † - syn of: Pterynotus perlongus (L.M.D. Bellardi, 1872 †) - (MURICIDAE) (FOSSIL)
- pseudolamellosa, Acar pseudolamellosa Berezovsky, 2014 † - (ARCIDAE) (FOSSIL)
- pseudolamellosa, Crassatella pseudolamellosa Berezovsky, 2017 † - (CRASSATELLIDAE) (FOSSIL)
- pseudolanceolata, Papuina pseudolanceolata P. Dautzenberg, 1903 - (CAMAENIDAE)
- pseudolaticostatus, Pseudocatillus pseudolaticostatus Chelidze, 1975 † - (CARDIIDAE) (FOSSIL)
- Pseudolatirus, Genus Pseudolatirus Bellardi, 1883 (FASCIOLARIIDAE) (FOSSIL)
- Pseudolatirus, syn of: Subgenus Streptochetus (Streptolathyrus) Cossmann, 1901 (FASCIOLARIIDAE) (FOSSIL)
- pseudolatum, Maoricardium pseudolatum R.P.A. Voskuil & W.J.H. Onverwagt, 1991 - (CARDIIDAE)
- Pseudoleacina, Genus Pseudoleacina W.A. Wenz, 1914 (OLEACINIDAE) (FOSSIL)
- Pseudoleda, Genus Pseudoleda Sanchez, 1995 (NUCULIDA (UNASSIGNED)) (FOSSIL)
- Pseudoledopsis, Genus Pseudoledopsis Maillieux, 1937 (PRAENUCULIDAE) (FOSSIL)
- Pseudoleguminaia, Genus Pseudoleguminaia Germain, 1911 (UNIONIDAE)
- Pseudoleila, Genus Pseudoleila Crosse & Fischer, 1894 (MYCETOPODIDAE)
- pseudoleioda, Charopa pseudoleioda H.H. Suter, 1890 - (CHAROPIDAE)
- pseudoleiodon, Huonodon pseudoleiodon (H.H. Suter, 1890) - (CHAROPIDAE)
- Pseudolepton, Genus Pseudolepton C. Mayer, 1865 (KELLIIDAE) (FOSSIL)
- pseudoleroyi, Scalina pseudoleroyi C.J. Maury, 1925 † - (EPITONIIDAE) (FOSSIL)
- pseudoleufroyi, Philbertia pseudoleufroyi R. Marquet, 1998 † - (RAPHITOMIDAE) (FOSSIL)
- pseudoleviathan, Leviathania pseudoleviathan (Choffat, 1886 †) - (LEVIATHANIIDAE) (FOSSIL)
- pseudolevisoni, Hildaites pseudolevisoni Venturi, 1981 † - (HILDOCERATIDAE) (FOSSIL)
- Pseudoleymeriella, Genus Pseudoleymeriella (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- Pseudoliatina, syn of: Genus Pseudoliotia R. Tate, 1898 (TORNIDAE)
- Pseudolibania, syn of: Genus Pleurobranchus G.L.C.F.D. Cuvier, 1804 (PLEUROBRANCHIDAE)
- Pseudolibera, Genus Pseudolibera G.A. Solem, 1976 (ENDODONTIDAE)
- Pseudoligyra, Subgenus Helicina (Pseudoligyra) F.C. Baker, 1954 (HELICINIDAE)
- Pseudolillia, Genus Pseudolillia Sassaroli & Venturi, 2005 (HILDOCERATIDAE) (FOSSIL)
- Pseudolilliconus, Genus Pseudolilliconus J.K. Tucker & M.J. Tenorio, 2009 (CONIDAE)
- pseudolima, Maoricardium pseudolima (J.B.P.A. Lamarck, 1819) - (CARDIIDAE)
- Pseudolima, syn of: Genus Pseudolimea Douglas & Arkell, 1932 (LIMIDAE) (FOSSIL)
- pseudolima, Chlamys pseudolima G.B. II Sowerby, 1842 - syn of: Mimachlamys sanguinea (C. Linnaeus, 1758) - (PECTINIDAE)
- pseudolima, Kyrina pseudolima (S.M. Souverbie & R.P. Montrouzier, 1862) - (VENERIDAE)
- Pseudolimea, Genus Pseudolimea Douglas & Arkell, 1932 (LIMIDAE) (FOSSIL)
- pseudolinealis, Aulacostephanoceras pseudolinealis Mesezhnikov, 1969 † - (AULACOSTEPHANIDAE) (FOSSIL)
- pseudolinearis, Solen pseudolinearis R. von Cosel, 2002 - (SOLENIDAE)
- Pseudolioceras, Genus Pseudolioceras Young & Bird, 1822 (HILDOCERATIDAE) (FOSSIL)
- pseudolioica, Chlamys pseudolioica V.N. Sinelnikova, 1975 † - (PECTINIDAE) (FOSSIL)
- Pseudoliomesus, Genus Pseudoliomesus T. Habe & J. Sato, 1973 (BUCCINIDAE)
- Pseudoliotia, Genus Pseudoliotia R. Tate, 1898 (TORNIDAE)
- Pseudoliotina, Genus Pseudoliotina A.E.M. Cossmann, 1925 (LIOTIIDAE)
- pseudoliozonis, Lepidochitona pseudoliozonis C.I. García-Ríos, 2015 - (LEPIDOCHITONIDAE)
- pseudolirata, Notovoluta pseudolirata (R. Tate, 1888) - (VOLUTIDAE)
- pseudoliratus, Callistotapes pseudoliratus E.W. Vredenburg, 1928 † - (VENERIDAE) (FOSSIL)
- Pseudolissoceras, Genus Pseudolissoceras Spath , 1925 (HAPLOCERATIDAE) (FOSSIL)
- pseudolitoralis, Unio pseudolitoralis S. Clessin, 1884 - syn of: Unio crassus L. Philipsson in A. Retzius, 1788 - (UNIONIDAE)
- pseudolitteratus, Conus pseudolitteratus Grateloup, 1847 † - (CONIDAE) (FOSSIL)
- Pseudoliva, Genus Pseudoliva W.J. Swainson, 1840 (PSEUDOLIVIDAE)
- pseudolivae, Gadila pseudolivae (M. Boissevain, 1906) - (GADILIDAE)
- Pseudolivella, Subgenus Olivancillaria (Pseudolivella) M. Glibert, 1960 (OLIVIDAE)
- pseudolivi, Cadulus pseudolivi M. Boissevain, 1906 - syn of: Gadila pseudolivae (M. Boissevain, 1906) - (GADILIDAE)
- PSEUDOLIVIDAE Gregorio, 1880 - Family (GASTROPODA-CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-OLIVOIDEA [Superfamily])
- pseudolochi, Epifungium pseudolochi E. Gittenberger & A. Gittenberger, 2005 - (EPITONIIDAE)
- pseudolongissima, Palaeanodonta pseudolongissima Khalfin, 1950 † - (PALAEANODONTIDAE) (FOSSIL)
- pseudolongissima, Inella pseudolongissima E. Rolán & R. Fernández-Garcés, 2008 - (TRIPHORIDAE)
- pseudolongus, Orthalicus pseudolongus (H. Strebel, 1909) - (ORTHALICIDAE)
- pseudolucifer, Inoceramus pseudolucifer Afitsky, 1967 † - (INOCERAMIDAE) (FOSSIL)
- pseudolucifer, Mytiloceramus pseudolucifer Afitsky, 1967 † - syn of: Inoceramus porrectus Voronetz, 1937 † - (PTERIIDA (unassigned)) (FOSSIL)
- Pseudolucina, Genus Pseudolucina Wilckens, 1909 (LIMIDAE) (FOSSIL)
- Pseudolucinisca, Genus Pseudolucinisca A.L. Chavan, 1959 (LUCINIDAE)
- pseudolutea, Palmadusta pseudolutea X.T. Ma, 1997 - syn of: Palmadusta saulae (J.S. Gaskoin, 1843) - (CYPRAEIDAE)
- pseudolutea, Alcithoe pseudolutea P. Bail & A. Limpus, 2005 - (VOLUTIDAE)
- pseudolyelli, Lyelliceras pseudolyelli (C.F. Parona & Bonarelli, 1897 †) - (LYELLICERATIDAE) (FOSSIL)
- pseudolyelliforme, Prolyelliceras pseudolyelliforme Etayo Serna, 1979 † - (PROLYELLICERATIDAE) (FOSSIL)
- pseudolynchoides, Latirus pseudolynchoides E.W. Vredenburg, 1923 † - (FASCIOLARIIDAE) (FOSSIL)
- pseudolyra, Athleta pseudolyra (A.V.M.D. D'Orbigny, 1850 †) - (VOLUTIDAE) (FOSSIL)
- Pseudolyria, Subgenus Lyria (Pseudolyria) K. Martin, 1931 (VOLUTIDAE)
- Pseudomacalia, Genus Pseudomacalia M. Huber, Langleit & Kreipl, 2015 (TELLINIDAE)
- Pseudomacrodon, Genus Pseudomacrodon Stoll, 1934 (PARALLELODONTIDAE) (FOSSIL)
- pseudomagister, Darioconus crocatus pseudomagister (Allary & T. Cossignani, 2016) - (CONIDAE)
- pseudomagnum, Hedecardium pseudomagnum (McCoy, 1877 †) - (CARDIIDAE) (FOSSIL)
- pseudomagus, Gibbula pseudomagus (Orbigny, 1852 †) - (TROCHIDAE) (FOSSIL)
- pseudomala, Turbonilla pseudomala (S. Nomura, 1938) - (PYRAMIDELLIDAE)
- pseudomala, Chemnitzia pseudomala S. Nomura, 1938 - syn of: Turbonilla pseudomala (S. Nomura, 1938) - (PYRAMIDELLIDAE)
- Pseudomalaxis, Genus Pseudomalaxis P. Fischer, 1885 (ARCHITECTONICIDAE)
- Pseudomalaxus, syn of: Genus Pseudomalaxis P. Fischer, 1885 (ARCHITECTONICIDAE)
- pseudomalbosi, Pseudothurmannia pseudomalbosi (Sarasin & Schöndelmayer, 1901 †) - (CRIOCERATITIDAE) (FOSSIL)
- pseudomalhamense, Syngastrioceras pseudomalhamense Kullmann, 1962 † - (GLAPHYRITIDAE) (FOSSIL)
- pseudomalii, Ashtarotha pseudomalii (Bosquet 1859) † - (ASTARTIDAE) (FOSSIL)
- Pseudomalletia, syn of: Genus Malletia C. des Moulins, 1828 (MALLETIIDAE)
- pseudomanzonii, Cerithiopsis pseudomanzonii O. Böttger, 1906 † - (CERITHIOPSIDAE) (FOSSIL)
- pseudomarginata, Euthria pseudomarginata M.A. Peyrot, 1925 † - (BUCCINIDAE) (FOSSIL)
- pseudomarginata, Zemitrella pseudomarginata (H.H. Suter, 1908) - (COLUMBELLIDAE)
- pseudomarginata, Mitrella pseudomarginata H.H. Suter, 1908 - syn of: Zemitrella pseudomarginata (H.H. Suter, 1908) - (COLUMBELLIDAE)
- pseudomarginata, Austromitra pseudomarginata H.H. Suter, 1913 - syn of: Austromitra rubiginosa (F.W. Hutton, 1873) - (COSTELLARIIDAE)
- pseudomarginata, Rastodens pseudomarginata W.F. Ponder, 1966 - (RASTODENTIDAE)
- pseudomarginatus, Conus pseudomarginatus H.A. Pilsbry, 1921 † - (CONIDAE) (FOSSIL)
- Pseudomarginella, syn of: Genus Marginella J.B.P.A. Lamarck, 1799 (MARGINELLIDAE)
- pseudomarginidentata, Ostrea pseudomarginidentata F.E. Eames, 1957 † - (OSTREIDAE) (FOSSIL)
- pseudomaritima, Bithynia wykoffi pseudomaritima R.A.M. Brandt, 1968 - (BITHYNIIDAE)
- pseudomarmoreus, Conus pseudomarmoreus J.C.H. Crosse, 1875 - syn of: Conus marmoreus C. Linnaeus, 1758 - (CONIDAE)
- pseudomarteli, Turbonilla pseudomarteli A. Peñas & E. Rolán, 1997 - (PYRAMIDELLIDAE)
- pseudomartinsi, Prorsisphinctes pseudomartinsi Siemiradzki † - (PERISPHINCTIDAE) (FOSSIL)
- Pseudomastus, syn of: Genus Mastus H.H. Beck, 1837 (ENIDAE)
- pseudomeadei, Helix pseudomeadei W.T. Bednall, 1876 - syn of: Xanthomelon spheroidea (E.J. Le Guillou, 1845) - (HELICIDAE)
- pseudomedleyanus, Griesbachites pseudomedleyanus Diener, 1908 † - (JUVAVITIDAE) (FOSSIL)
- Pseudomegalovalvata, Subgenus Valvata (Pseudomegalovalvata) Kozhov, 1936 (VALVATIDAE)
- Pseudomelampus, Genus Pseudomelampus P.M. Pallary, 1900 (ELLOBIIDAE)
- Pseudomelania, Genus Pseudomelania Pictet & Campiche, 1862 (PSEUDOMELANIIDAE) (FOSSIL)
- PSEUDOMELANIIDAE R. Hoernes, 1884 - Family (GASTROPODA-CAENOGASTROPODA [Subclass]-PSEUDOMELANIOIDEA [Superfamily]) (FOSSIL)
- Pseudomelatoma, Genus Pseudomelatoma W.H. Dall, 1918 (PSEUDOMELATOMIDAE)
- PSEUDOMELATOMIDAE Morrison, 1965 - Family (GASTROPODA-CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-CONOIDEA [Superfamily])
- pseudomera, Macoma pseudomera W.H. Dall & C.T. Simpson, 1901 - (TELLINIDAE)
- Pseudomercaticeras, Genus Pseudomercaticeras Reynes, 1868 (PHYMATOCERATIDAE) (FOSSIL)
- Pseudomerelina, Subgenus Iravadia (Pseudomerelina) W.F. Ponder, 1984 (IRAVADIIDAE)
- pseudomeriani, Trigonia pseudomeriani Choffat, 1885 † - (TRIGONIIDAE) (FOSSIL)
- Pseudomesalia, Genus Pseudomesalia Douvillι, 1916 (TURRITELLIDAE) (FOSSIL)
- Pseudomesodontrachia, Genus Pseudomesodontrachia Criscione & Kφhler, 2013 (CAMAENIDAE)
- Pseudometacoceras, Genus Pseudometacoceras Miller & al., 1933 (TAINOCERATIDAE) (FOSSIL)
- Pseudometis, syn of: Genus Psammotreta W.H. Dall, 1900 (TELLINIDAE)
- Pseudometis, syn of: Genus Psammacoma Dall, 1900 (TELLINIDAE) (FOSSIL)
- Pseudometula, Genus Pseudometula Garvie, 1996 (NEOGASTROPODA (UNASSIGNED)) (FOSSIL)
- pseudomiara, Chloritis pseudomiara A.R.J.B. Bavay & P. Dautzenberg, 1909 - (CAMAENIDAE)
- pseudomicans, Theodoxus hellenicus pseudomicans (Bukowski, 1896 †) - (NERITIDAE) (FOSSIL)
- Pseudomilax, syn of: Genus Drilolestes W.A. Lindholm, 1925 (TRIGONOCHLAMYDIDAE)
- Pseudomiltha, Genus Pseudomiltha P. Fischer, 1887 (LUCINIDAE) (FOSSIL)
- Pseudominolia, Genus Pseudominolia D.G. Herbert, 1992 (TROCHIDAE)
- pseudomisakiensis, Leostyletus pseudomisakiensis A.V. Martynov, 1998 - (EUBRANCHIDAE)
- Pseudomitchellia, Genus Pseudomitchellia Frύda & al., 2002 (SCOLIOSTOMATIDAE) (FOSSIL)
- pseudomodesta, Bolma pseudomodesta (S. Nomura, 1935 †) - (TURBINIDAE) (FOSSIL)
- Pseudomodiolus, Genus Pseudomodiolus Betekhtina, 1966 (PROKOPIEVSKIIDAE) (FOSSIL)
- Pseudomonacha, syn of: Genus Monachoides G.P.L.K. Gude & B.B. Woodward, 1921 (HYGROMIIDAE)
- pseudomonilifera, Gemmula pseudomonilifera A.W.B. Powell, 1967 - (TURRIDAE)
- pseudomonodonta, Rissoa hyalina pseudomonodonta A. Verduin, 1983 - (RISSOIDAE)
- PSEUDOMONOTIDAE Newell, 1938 - Family (BIVALVIA-PTERIOMORPHIA [Subclass]-PECTINIDA [Order]-PSEUDOMONOTOIDEA [Superfamily]) (FOSSIL)
- Pseudomonotis, Genus Pseudomonotis von Beyrich, 1862 (PSEUDOMONOTIDAE) (FOSSIL)
- Pseudomorea, Genus Pseudomorea Cossmann, 1925 (NEOGASTROPODA (UNASSIGNED)) (FOSSIL)
- pseudomorphum, Loxonema pseudomorphum C. Gemmellaro, 1889 † - (LOXONEMATIDAE) (FOSSIL)
- pseudomotruensis, Viviparus pseudomotruensis V.V. Bogachev, 1961 † - (VIVIPARIDAE) (FOSSIL)
- Pseudomoutoniceras, Genus Pseudomoutoniceras Autran, Delanoy & Thomel, 1986 (CRIOCERATITIDAE) (FOSSIL)
- pseudomovilla, Cerithiopsis pseudomovilla E. Rolán & J. Espinosa, 1996 - (CERITHIOPSIDAE)
- Pseudompalotrochus, Genus Pseudompalotrochus (EUOMPHALINA (UNASSIGNED)) (FOSSIL)
- Pseudomphala, syn of: Genus Assiminea J. Fleming, 1828 (ASSIMINEIDAE)
- Pseudomphalotrochus, Genus Pseudomphalotrochus Blodgett, 1992 (OMPHALOTROCHIDAE) (FOSSIL)
- pseudomphalus, Geophorus pseudomphalus (O.F. von Möllendorff, 1894) - (HELICINIDAE)
- Pseudomphalus, Subgenus Diplomphalus (Pseudomphalus) C.M.F. Ancey, 1882 (RHYTIDIDAE)
- Pseudomucronalia, Genus Pseudomucronalia A. Adams, 1861 (EULIMIDAE)
- Pseudomulceodens, Genus Pseudomulceodens Hoare , 1990 (CONOCARDIIDAE) (FOSSIL)
- Pseudomulleria, Genus Pseudomulleria J.G. Anthony, 1907 (ETHERIIDAE)
- pseudomulticostatum, Europicardium pseudomulticostatum (Zhizhchenko, 1934 †) - (CARDIIDAE) (FOSSIL)
- pseudomultigyrata, Turbonilla pseudomultigyrata S. Nomura, 1936 - (PYRAMIDELLIDAE)
- pseudomunda, Bothropoma pseudomunda M. Harzhauser, 2014 † - (COLLONIIDAE) (FOSSIL)
- pseudomundus, Alectrion pseudomundus C.H. Oostingh, 1935 - syn of: Nassarius concinnus (W.L. Powys, 1835) - (NASSARIIDAE)
- Pseudomurchisonia, syn of: Genus Murchisonia d'Archiac & Verneuil, 1841 (MURCHISONIIDAE) (FOSSIL)
- Pseudomurex, syn of: Genus Coralliophila H. Adams & A. Adams, 1853 (MURICIDAE)
- pseudomus, Cypraea brocchii pseudomus A.V.M.D. D'Orbigny, 1852 † - (CYPRAEIDAE) (FOSSIL)
- Pseudomuseum, syn of: Genus Palliolum T.A. de M. Monterosato, 1884 (PECTINIDAE)
- Pseudomussium, syn of: Genus Pseudamussium O.A.L. Mφrch, 1853 (PECTINIDAE)
- Pseudomutela, syn of: Genus Mutela J.A. Scopoli, 1777 (IRIDINIDAE)
- pseudomuticum, Metaderoceras pseudomuticum Dubar, 1978 † - (EODEROCERATIDAE) (FOSSIL)
- Pseudomya, Genus Pseudomya Rφder, 1882 (BIVALVIA INCERTAE SEDIS) (FOSSIL)
- Pseudomyalina, Genus Pseudomyalina Dickins, 1956 (MYALINIDAE) (FOSSIL)
- Pseudomyoconcha, Genus Pseudomyoconcha Rossi & al., 1966 (KALENTERIDAE) (FOSSIL)
- Pseudomyona, Genus Pseudomyona Pojeta & Runnegar, 1976 (HELCIONELLIDAE) (FOSSIL)
- Pseudomyophorella, Genus Pseudomyophorella Nakano, 1961 (MYOPHORELLIDAE) (FOSSIL)
- pseudomystica, Clavatula pseudomystica F. Nolf, 2008 - (CLAVATULIDAE)
- Pseudomytiloides, Genus Pseudomytiloides Marwick, 1934 (INOCERAMIDAE) (FOSSIL)
- pseudonana, Ancillus pseudonana F.E. Eames, 1952 † - (ANCILLARIIDAE) (FOSSIL)
- pseudonanum, Epitonium pseudonanum P. Bouchet & A. Warén, 1986 - (EPITONIIDAE)
- Pseudonapaeus, Genus Pseudonapaeus C.A. Westerlund, 1887 (ENIDAE)
- pseudonarzolina, Melanopsis impressa pseudonarzolina Papp, 1953 † - (MELANOPSIDAE) (FOSSIL)
- Pseudonatica, Genus Pseudonatica Simone, 2017 (ZEROTULIDAE)
- PSEUDONAUTILIDAE Shimansky & Erlanger, 1955 - Family (CEPHALOPODA-NAUTILOIDEA [Subclass]-NAUTILIDA [Order]-NAUTILITOIDEA [Superfamily]) (FOSSIL)
- Pseudonautilus, Genus Pseudonautilus Meek, 1876 (PSEUDONAUTILIDAE) (FOSSIL)
- pseudonavicula, Barbatia pseudonavicula F.E. Eames, 1951 † - (ARCIDAE) (FOSSIL)
- pseudonavicularis, Arca pseudonavicularis R. Tate, 1886 † - (ARCIDAE) (FOSSIL)
- Pseudoneaera, Genus Pseudoneaera R. Sturany, 1901 (CUSPIDARIIDAE)
- Pseudoneara, syn of: Genus Pseudoneaera R. Sturany, 1901 (CUSPIDARIIDAE)
- pseudonegama, Cymatoceras pseudonegama L. Spengler, 1910 † - (CYMATOCERATIDAE) (FOSSIL)
- Pseudoneilonella, syn of: Genus Neilonella G. Seguenza, 1877 (NEILONELLIDAE)
- pseudonemorensis, Asperitas trochus pseudonemorensis B. Rensch, 1930 - (DYAKIIDAE)
- Pseudonenia, syn of: Genus Oospira W.T. Blanford, 1872 (CLAUSILIIDAE)
- Pseudoneocomites, Genus Pseudoneocomites Hoedemaeker , 1982 (NEOCOMITIDAE) (FOSSIL)
- pseudoneokomiense, Cymatoceras pseudoneokomiense Shimizu, 1931 † - (CYMATOCERATIDAE) (FOSSIL)
- Pseudoneoptychites, Genus Pseudoneoptychites Leanza , 1967 (VASCOCERATIDAE) (FOSSIL)
- Pseudoneptunea, Genus Pseudoneptunea W. Kobelt, 1882 (BUCCINIDAE)
- Pseudonerinea, Genus Pseudonerinea Loriol, 1890 (CERITELLIDAE) (FOSSIL)
- Pseudonerita, Subgenus Neritina (Pseudonerita) F.C. Baker, 1923 (NERITIDAE)
- pseudonigrolimbata, Polymita picta pseudonigrolimbata C. de la Torre, 1950 - (HELMINTHOGLYPTIDAE)
- Pseudonina, Genus Pseudonina Sacco, 1896 (NYSTIELLIDAE) (FOSSIL)
- Pseudoninella, Subgenus Angaria (Pseudoninella) Sacco, 1896 (ANGARIIDAE) (FOSSIL)
- pseudonitens, Cochlicopa pseudonitens K.K. Uvalieva, 1967 - (COCHLICOPIDAE)
- pseudonivifer, Trovaoconus pseudonivifer (A. Monteiro, M.J. Tenorio & G.T. Poppe, 2004) - (CONIDAE)
- Pseudonoba, Subgenus Iravadia (Pseudonoba) O. Bφttger, 1902 (IRAVADIIDAE)
- pseudonodosoides, Pseudaspidoceras pseudonodosoides (Choffat, 1898 †) - (ACANTHOCERATIDAE) (FOSSIL)
- Pseudonoduloconus, Genus Pseudonoduloconus J.K. Tucker & M.J. Tenorio, 2009 (CONIDAE)
- pseudonodulosa, Venericardia pseudonodulosa E.W. Vredenburg, 1928 † - (CARDITIDAE) (FOSSIL)
- pseudonodulosa, Fusoterebra terebrina pseudonodulosa F. Sacco † - (TEREBRIDAE) (FOSSIL)
- Pseudonomismoceras, Genus Pseudonomismoceras Frech, 1899 (NOMISMOCERATIDAE) (FOSSIL)
- pseudonotabilis, Yoldia pseudonotabilis O.A. Scarlato, 1981 - (YOLDIIDAE)
- pseudonovem, Triphora pseudonovem E. Rolán & Y.C. Lee, 2008 - (TRIPHORIDAE)
- pseudonucleolus, Rossiteria pseudonucleolus G.T. Poppe, S.P. Tagaro & H. Dekker, 2006 - (TROCHIDAE)
- pseudonucleus, Nucleolaria pseudonucleus F. Moretzsohn, 2011 - (CYPRAEIDAE)
- pseudonucleus, Rossiteria pseudonucleus G.T. Poppe, S.P. Tagaro & H. Dekker, 2006 - syn of: Rossiteria pseudonucleolus G.T. Poppe, S.P. Tagaro & H. Dekker, 2006 - (TROCHIDAE)
- Pseudonucula, Genus Pseudonucula Dickins, 1989 (PRAENUCULIDAE) (FOSSIL)
- Pseudonuculana, Genus Pseudonuculana Pojeta, Zhang Renjie & Yang Zunyi, 1986 (NUCULIDA (UNASSIGNED)) (FOSSIL)
- pseudonumidica, Trochoidea pseudonumidica E. Caziot, 1910 - syn of: Trochoidea pyramidata (J.P.R. Draparnaud, 1805) - (HYGROMIIDAE)
- pseudonyma, Naesiotus pazianus pseudonyma H.A. Pilsbry, 1898 - (BULIMULIDAE)
- pseudonyma, Dentalium pseudonyma H.A. Pilsbry & B. Sharp, 1898 † - (DENTALIIDAE) (FOSSIL)
- pseudonymus, Benthoctopus pseudonymus (G.J. Von Grimpe, 1922) - (OCTOPODIDAE)
- pseudonystii, Murex pseudonystii Wood, 1879 † - (MURICIDAE) (FOSSIL)
- pseudonystii similis, Murex pseudonystii similis F.W. Harmer † - (MURICIDAE) (FOSSIL)
- pseudoobeliscus, Campanile pseudoobeliscus J.P.S. Grateloup, 1832 † - syn of: Cerithium pseudoobeliscus (J.P.S. Grateloup, 1832 †) - (CAMPANILIDAE) (FOSSIL)
- pseudoobeliscus, Cerithium pseudoobeliscus (J.P.S. Grateloup, 1832 †) - (CERITHIIDAE) (FOSSIL)
- pseudookuboi, Serriphaedusa pseudookuboi H. Nordsieck, 2016 - (CLAUSILIIDAE)
- pseudoopalinum, Huananoceras pseudoopalinum (Frech, 1895 †) - (HUANANOCERATIDAE) (FOSSIL)
- pseudoopalinus, Paraceltites pseudoopalinus Frech, 1895 † - syn of: Hornyzyga altacostatum (Tassell, 1982 †) - (PARACELTITIDAE) (FOSSIL)
- pseudoorbicularis, Dosiniopsis pseudoorbicularis Tremlett, 1953 † - (VENERIDAE) (FOSSIL)
- Pseudoosterella, Genus Pseudoosterella Spath , 1924 (OOSTERELLIDAE) (FOSSIL)
- pseudoovata, Radix pseudoovata (A.V.M.D. D'Orbigny, 1852 †) - (LYMNAEIDAE) (FOSSIL)
- pseudopachista, Marginella pseudopachista A. Aiken, 2014 - (MARGINELLIDAE)
- Pseudopachymytilus, Genus Pseudopachymytilus Krumbeck, 1923 (PTERIIDA (UNASSIGNED)) (FOSSIL)
- Pseudopalaina, Genus Pseudopalaina O.F. von Mφllendorff, 1898 (DIPLOMMATINIDAE)
- Pseudopalaina, syn of: Genus Palaina J.O. Semper, 1865 (DIPLOMMATINIDAE)
- pseudopalina, Mathilda pseudopalina Grundel, 2007 † - (MATHILDIDAE) (FOSSIL)
- Pseudopalliorum, syn of: Genus Propeamussium A. De Gregorio, 1884 (PROPEAMUSSIIDAE)
- Pseudopaludinella, Genus Pseudopaludinella J.R. Bourguignat in J.F. Mabille, 1877 (HYDROBIIDAE)
- pseudopalustris, Lymnaea pseudopalustris A.V.M.D. D'Orbigny, 1852 † - syn of: Lymnaea urceolata pseudopalustris A.V.M.D. D'Orbigny, 1852 † - (LYMNAEIDAE) (FOSSIL)
- pseudopalustris, Lymnaea urceolata pseudopalustris A.V.M.D. D'Orbigny, 1852 † - (LYMNAEIDAE) (FOSSIL)
- pseudopandorae, Antipecten pseudopandorae (Berkeley Cotter 1904) † - (PTERIIDA (UNASSIGNED)) (FOSSIL)
- pseudopannus, Ophiodermella pseudopannus (M. Yokoyama, 1922 †) - (BORSONIIDAE) (FOSSIL)
- pseudopanorminatum, Deroceras pseudopanorminatum A. Wiktor, 1984 - (AGRIOLIMACIDAE)
- pseudopanormitanum, Deroceras pseudopanormitanum A. Wiktor, 1984 - (AGRIOLIMACIDAE)
- pseudopapillata, Trigonia pseudopapillata Dickan, 1990 † - (TRIGONIIDAE) (FOSSIL)
- pseudopapuina, Aegista pseudopapuina (O.F. von Möllendorff, 1901) - (BRADYBAENIDAE)
- Pseudopapuina, syn of: Genus Planispira H.H. Beck, 1837 (CAMAENIDAE)
- Pseudoparalegoceras, Genus Pseudoparalegoceras Miller & Downs, 1948 (PSEUDOPARALEGOCERATIDAE) (FOSSIL)
- PSEUDOPARALEGOCERATIDAE Librovitch, 1957 - Family (CEPHALOPODA-AMMONOIDEA [Subclass]-GONIATITIDA [Order]-SCHISTOCERATOIDEA [Superfamily]) (FOSSIL)
- Pseudoparastrophia, syn of: Genus Parastrophia L. de Folin, 1869 (CAECIDAE)
- pseudopareora, Aclis pseudopareora A.W.B. Powell, 1940 - (ACLIDIDAE)
- pseudoparnassia, Codringtonia pseudoparnassia (W. Kobelt, 1879) - (HELICIDAE)
- Pseudoparreysia, Genus Pseudoparreysia F.R. Woodward, 1965 (UNIONIDAE)
- Pseudopartula, Genus Pseudopartula L. Pfeiffer, 1855 (CAMAENIDAE)
- Pseudopatella, syn of: Genus Asiapatella Parkhaev & Demidenko, 2010 (HELCIONELLIDAE) (FOSSIL)
- pseudopatula, Plectotropis pseudopatula O.F. von Möllendorff, 1899 - (BRADYBAENIDAE)
- Pseudopeas, Genus Pseudopeas S. Putzeys, 1899 (SUBULINIDAE)
- pseudopecten, Anomia pseudopecten F. Sacco, 1897 † - (ANOMIIDAE) (FOSSIL)
- Pseudopecten, Genus Pseudopecten Bayle, 1878 (PECTINIDAE) (FOSSIL)
- pseudopellatus, Bicorempterus pseudopellatus (Gerasimov, 1992 †) - (APORRHAIDAE) (FOSSIL)
- Pseudopeltoceras, Genus Pseudopeltoceras D'Orbigny, 1842 (ASPIDOCERATIDAE) (FOSSIL)
- pseudopentastichus, Neosirenites pseudopentastichus Bychkov, 1973 † - (TRACHYCERATIDAE) (FOSSIL)
- pseudoperforata, Megastomia pseudoperforata (S. Nomura, 1939) - (PYRAMIDELLIDAE)
- pseudoperforata, Marginodostomia pseudoperforata S. Nomura, 1939 - syn of: Megastomia pseudoperforata (S. Nomura, 1939) - (PYRAMIDELLIDAE)
- Pseudoperisphinctes, Genus Pseudoperisphinctes Schindewolf, 1925 (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- Pseudoperissitys, Genus Pseudoperissitys Nagao & Otatume, 1938 (NEOGASTROPODA (UNASSIGNED)) (FOSSIL)
- Pseudoperissolax, Genus Pseudoperissolax B. L. Clark, 1918 (MURICIDAE) (FOSSIL)
- Pseudopermophorus, Genus Pseudopermophorus Ciriacks, 1963 (KALENTERIDAE) (FOSSIL)
- Pseudopermorphus, Genus Pseudopermorphus (CARDIIDA (UNASSIGNED)) (FOSSIL)
- Pseudoperna, Genus Pseudoperna Logan, 1899 (OSTREIDAE) (FOSSIL)
- Pseudoperonaeus, Subgenus Bostryx (Pseudoperonaeus) W.K. Weyrauch, 1958 (BULIMULIDAE)
- Pseudoperonaeus, syn of: Subgenus Bostryx (Geopyrgus) H.A. Pilsbry, 1896 (BULIMULIDAE)
- pseudoperornatum, Huananoceras pseudoperornatum Zheng, 1981 † - (HUANANOCERATIDAE) (FOSSIL)
- pseudoperspectiva, Discotectonica pseudoperspectiva (G.B. Brocchi, 1814) - (ARCHITECTONICIDAE)
- pseudoperspectiva, Philippia pseudoperspectiva G.B. Brocchi, 1814 - syn of: Discotectonica pseudoperspectiva (G.B. Brocchi, 1814) - (ARCHITECTONICIDAE)
- pseudopertusa, Hastulopsis pseudopertusa (T. Bratcher & W.O. Cernohorsky, 1985) - (TEREBRIDAE)
- pseudopertusa, Terebra pseudopertusa M.A. Peyrot, 1931 † - (TEREBRIDAE) (FOSSIL)
- pseudopertusa aturensis, Hastulopsis pseudopertusa aturensis (M.A. Peyrot, 1932 †) - (TEREBRIDAE) (FOSSIL)
- Pseudopetalodontia, Genus Pseudopetalodontia Masse & al., 2007 (MONOPLEURIDAE) (FOSSIL)
- Pseudopetraeus, syn of: Genus Pseudonapaeus C.A. Westerlund, 1887 (ENIDAE)
- Pseudophacoceras, Genus Pseudophacoceras Spath, 1921 (NAUTILIDA (UNASSIGNED)) (FOSSIL)
- Pseudophaedusa, Subgenus Phaedusa (Pseudophaedusa) K. Tomiyama, 1984 (CLAUSILIIDAE)
- Pseudopharkidonotus, syn of: Genus Teutonophon Blodgett & Frύda, 1999 (BELLEROPHONTIDAE) (FOSSIL)
- Pseudophasianus, Genus Pseudophasianus Cossmann, 1918 (TURBINIDAE) (FOSSIL)
- Pseudophasis, Subgenus Erepta (Pseudophasis) J. Germain, 1918 (HELICARIONIDAE)
- Pseudophiline, Genus Pseudophiline Habe, 1976 (PHILINORBIDAE)
- pseudophilippinarum, Volvarina pseudophilippinarum T. Cossignani, 2008 - (MARGINELLIDAE)
- Pseudophilites, syn of: Genus Pseudophyllites Kossmat, 1895 (TETRAGONITIDAE) (FOSSIL)
- PSEUDOPHORIDAE S.A. Miller, 1889 - Family (GASTROPODA-EOGASTROPODA [Subclass]-EUOMPHALINA [Order]-OPHILETOIDEA [Superfamily]) (FOSSIL)
- Pseudophorus, Genus Pseudophorus Meek, 1873 (PSEUDOPHORIDAE) (FOSSIL)
- Pseudophragmoceras, Genus Pseudophragmoceras Zhuravleva, 1972 (DISCOSORIDA (UNASSIGNED)) (FOSSIL)
- pseudophrygica, Sprattia pseudophrygica H. Nordsieck, 2004 - (CLAUSILIIDAE)
- Pseudophyllites, Genus Pseudophyllites Kossmat, 1895 (TETRAGONITIDAE) (FOSSIL)
- pseudophyllum, Pseudaneitea pseudophyllum D.W. Burton, 1963 - (ATHORACOPHORIDAE)
- pseudopicta, Terebra pseudopicta U. Aubry, 2008 - (TEREBRIDAE)
- pseudopictus, Liguus fasciatus pseudopictus C.T. Simpson, 1920 - (ORTHALICIDAE)
- pseudopigmea, Melanopsis pseudopigmea Magrograssi, 1928 † - (MELANOPSIDAE) (FOSSIL)
- pseudopillula, Vilasina pseudopillula I.N.V. Ivanova in O.A. Scarlato, 1981 - syn of: Vilasina seminuda (W.H. Dall, 1897) - (MYTILIDAE)
- Pseudopineria, Genus Pseudopineria C.G. Aguayo, 1938 (UROCOPTIDAE)
- Pseudopineria, syn of: Genus Pineria F. Poey, 1854 (UROCOPTIDAE)
- pseudopiperatus, Plekocheilus pseudopiperatus S. Moricand, 1858 - (AMPHIBULIMIDAE)
- Pseudopironaea, Genus Pseudopironaea Bilotte, 1982 (HIPPURITIDA (UNASSIGNED)) (FOSSIL)
- Pseudopis, Genus Pseudopis Cox, 1946 (CARDIIDA (UNASSIGNED)) (FOSSIL)
- Pseudopisania, Subgenus Mitrella (Pseudopisania) A.E.M. Cossmann, 1897 (COLUMBELLIDAE)
- Pseudopisidium, syn of: Genus Sphaerium J.A. Scopoli, 1777 (SPHAERIIDAE)
- Pseudopisidum, Genus Pseudopisidum Tashiro & Kozai, (VENERIDAE) (FOSSIL)
- Pseudopisinna, Genus Pseudopisinna W.F. Ponder, 1980 (CINGULOPSIDAE)
- pseudopisum, Varicorbula pseudopisum (A.E.M. Cossmann, 1886 †) - (CORBULIDAE) (FOSSIL)
- pseudoplacenta, Placenticeras pseudoplacenta A. Hyatt, 1903 † - (PLACENTICERATIDAE) (FOSSIL)
- Pseudoplacenticeras, Genus Pseudoplacenticeras Spath, 1926 (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- Pseudoplacuna, Genus Pseudoplacuna Mayer, 1877 (ANOMIIDAE) (FOSSIL)
- Pseudoplacunopsis, Genus Pseudoplacunopsis Bittner, 1895 (PLICATULIDAE) (FOSSIL)
- Pseudoplagiothyra, Genus Pseudoplagiothyra Vostokova , 1961 (NATICOPSIDAE) (FOSSIL)
- pseudoplanorbis, Solarium pseudoplanorbis Ikins, 1940 † - syn of: Architectonica planorbis F.A. Roemer, 1888 † - (ARCHITECTONICIDAE) (FOSSIL)
- pseudoplanorbis, Systrophiella pseudoplanorbis (W. . Lubomirski, 1879) - (SCOLODONTIDAE)
- pseudoplanulatum, Kraffticeras pseudoplanulatum (Krafft & Diener, 1909 †) - (KASHMIRITIDAE) (FOSSIL)
- Pseudoplatyceras, Genus Pseudoplatyceras Qiao (ARCHAEOGASTROPODA (UNASSIGNED)) (FOSSIL)
- Pseudoplecta, Genus Pseudoplecta F.F. Laidlaw, 1932 (DYAKIIDAE)
- Pseudopleurophorus, Genus Pseudopleurophorus Chavan, 1954 (CARDIIDA (UNASSIGNED)) (FOSSIL)
- Pseudoplocezyga, Genus Pseudoplocezyga Licharev, 1975 (PSEUDOZYGOPLEURIDAE) (FOSSIL)
- pseudopoecilostictus, Nassarius pseudopoecilostictus W. Adam & J. Knudsen, 1984 - (NASSARIIDAE)
- Pseudopolinices, Genus Pseudopolinices A.N. Golikov & B.I. Sirenko, 1983 (NATICIDAE)
- Pseudopolita, Subgenus Retinella (Pseudopolita) J. Germain, 1908 (ZONITIDAE)
- Pseudopollicina, Genus Pseudopollicina Vostokova, 1962 (HELCIONELLIDAE) (FOSSIL)
- Pseudopolyconites, Genus Pseudopolyconites Milovanovic, 1935 (RADIOLITIDAE) (FOSSIL)
- Pseudopolyplectus, syn of: Genus Osperleioceras Krimholtz & Tazikhin, 1957 (HILDOCERATIDAE) (FOSSIL)
- pseudopolyptychites, Ringnesiceras pseudopolyptychites Kemper & Jeletzky, 1979 † - (POLYPTYCHITIDAE) (FOSSIL)
- pseudopolyptychum, Ringnesiceras pseudopolyptychum Kemper & Jeletzky, 1979 † - (POLYPTYCHITIDAE) (FOSSIL)
- pseudopomatias, Arinia pseudopomatias (P.V. Gredler, 1902) - (DIPLOMMATINIDAE)
- Pseudopomatias, Genus Pseudopomatias O.F. von Mφllendorff, 1885 (PUPINIDAE)
- pseudoponderosus, Chelyconus pseudoponderosus Dollfus & Dautz, 1952 † - (CONIDAE) (FOSSIL)
- Pseudoporites, Genus Pseudoporites Lyashenko, 1980 (ROSSIITIDAE) (FOSSIL)
- Pseudoportlandia, Genus Pseudoportlandia Woodring, 1925 (NUCULANIDAE) (FOSSIL)
- Pseudopotamis, Subgenus Brotia (Pseudopotamis) A. Brot, 1894 (PACHYCHILIDAE)
- Pseudopotomida, Genus Pseudopotomida I.M. Moskvicheva & Y.I. Starobogatov, 1973 (UNIONIDAE)
- Pseudoppelia, syn of: Subgenus Oxycerites (Paroxycerites) Breistrofer, 1947 (OPPELIIDAE) (FOSSIL)
- pseudopradyumna, Leiophyllites pseudopradyumna (Diener, 1895 †) - (USSURITIDAE) (FOSSIL)
- pseudopraecedens, Circulus pseudopraecedens W. Adam & J. Knudsen, 1969 - (TORNIDAE)
- pseudopraecursor, Malletia pseudopraecursor Kurushin, 1985 † - (MALLETIIDAE) (FOSSIL)
- pseudopraerosa, Melanopsis pseudopraerosa F. Sacco, 1889 † - syn of: Melanopsis pedemontana pseudopraerosa F. Sacco, 1889 † - (MELANOPSIDAE) (FOSSIL)
- pseudopraerosa, Melanopsis pedemontana pseudopraerosa F. Sacco, 1889 † - (MELANOPSIDAE) (FOSSIL)
- pseudoprinceps, Rissoina pseudoprinceps H.C. Weinkauff, 1884 - (RISSOINIDAE)
- pseudoprincipalis, Drillia pseudoprincipalis M. Yokoyama, 1920 - syn of: Inquisitor pseudoprincipalis (M. Yokoyama, 1920) - (DRILLIIDAE)
- pseudoprincipalis, Inquisitor pseudoprincipalis (M. Yokoyama, 1920) - (PSEUDOMELATOMIDAE)
- pseudoprincipalis, Ptychobela pseudoprincipalis M. Yokoyama, 1920 - syn of: Inquisitor pseudoprincipalis (M. Yokoyama, 1920) - (PSEUDOMELATOMIDAE)
- Pseudoprobeloceras, Genus Pseudoprobeloceras Bensaοd , 1974 (PONTICERATIDAE) (FOSSIL)
- pseudoprocerus, Procerozigzag pseudoprocerus (Buckman) † - (PERISPHINCTIDAE) (FOSSIL)
- Pseudopronorites, Genus Pseudopronorites Nassichuk , 1975 (PRONORITIDAE) (FOSSIL)
- Pseudoproptychites, Genus Pseudoproptychites Bando , 1981 (PROPTYCHITIDAE) (FOSSIL)
- Pseudoprosphingites, Genus Pseudoprosphingites Shevyrev, 1995 (MELAGATHICERATIDAE) (FOSSIL)
- pseudoproxima, Chevallieria pseudoproxima (A.W. Janssen, 1967 †) - (IRAVADIIDAE) (FOSSIL)
- pseudoprunum, Chloritis pseudoprunum H.A. Pilsbry, 1893 - syn of: Parglogenia pelodes (L. Pfeiffer, 1846) - (CAMAENIDAE)
- Pseudopsammobia, Genus Pseudopsammobia M. Huber, Langleit & Kreipl, 2015 (TELLINIDAE)
- pseudopsila, Falsilunatia pseudopsila K.H. Barnard, 1963 - (NATICIDAE)
- pseudopsis, Cylichnidia pseudopsis T.V. Wollaston, 1878 - syn of: Cylichnidia ovuliformis (R.T. Lowe, 1831) - (FERUSSACIIDAE)
- Pseudoptera, Genus Pseudoptera Meek, 1873 (BAKEVELLIIDAE) (FOSSIL)
- Pseudopterygia, Genus Pseudopterygia J.K. Tucker & M.J. Tenorio, 2013 (CONIDAE)
- Pseudoptychoceras, Genus Pseudoptychoceras Etayo-Serna, 1979 (PTYCHOCERATIDAE) (FOSSIL)
- pseudopulchella, Epitonium pseudopulchella G. Seguenza, 1879 - syn of: Epitonium trevelyana Johnston, 1841 - (EPITONIIDAE)
- pseudopulchella, Tiberia pseudopulchella M. Yokoyama, 1920 - (PYRAMIDELLIDAE)
- Pseudopulchellia, Genus Pseudopulchellia Imlay , 1961 (HOPLITIDAE) (FOSSIL)
- pseudopulvinatus, Glycymeris dispar pseudopulvinatus d'Orbigny, 1850 † - (GLYCYMERIDIDAE) (FOSSIL)
- pseudopunctata, Brevinucula pseudopunctata D.T. Dockery, 1982 † - (NUCULIDAE) (FOSSIL)
- pseudopunctatum, Orbignyiceras pseudopunctatum (Lahusen, 1883 †) - (OPPELIIDAE) (FOSSIL)
- Pseudopunctum, Subgenus Punctum (Pseudopunctum) J.P.E. Morrison, 1935 (PUNCTIDAE)
- pseudopusilla, Tellina pseudopusilla (R. von Cosel, 1995) - (TELLINIDAE)
- pseudopusilla, Moerella pseudopusilla R. von Cosel, 1995 - syn of: Tellina pseudopusilla (R. von Cosel, 1995) - (TELLINIDAE)
- Pseudopusula, Genus Pseudopusula Fehse & Grego, 2014 (TRIVIIDAE)
- Pseudopuzosia, syn of: Genus Pseudojacobites Spath, 1922 (PACHYDISCIDAE) (FOSSIL)
- pseudopygmaea, Goodallia waeli pseudopygmaea (M. Glibert, 1957 ) - (ASTARTIDAE)
- pseudopygmaea, Patelloida pseudopygmaea T. Nakano & Aswan, 2008 - (LOTTIIDAE)
- pseudopygmaea, Melanopsis pseudopygmaea E. Jekelius, 1944 † - (MELANOPSIDAE) (FOSSIL)
- pseudopyramidata, Trochoidea pseudopyramidata E. Caziot, 1910 - syn of: Trochoidea pyramidata (J.P.R. Draparnaud, 1805) - (HYGROMIIDAE)
- Pseudopythina, Genus Pseudopythina P. Fischer, 1884 (KELLIIDAE)
- Pseudopythinia, syn of: Genus Pseudopythina P. Fischer, 1884 (KELLIIDAE)
- pseudoquadrasi, Assiminea nitida pseudoquadrasi R.T. Abbott, 1948 - (ASSIMINEIDAE)
- pseudoradiata, Placunopsis pseudoradiata d'Orbigny † - (ANOMIIDAE) (FOSSIL)
- pseudoradiatus, Aviculopecten pseudoradiatus (Fredericks, 1915 †) - (AVICULOPECTINIDAE) (FOSSIL)
- pseudoradiatus, Pterinopecten pseudoradiatus Fredericks, 1915 † - syn of: Aviculopecten pseudoradiatus (Fredericks, 1915 †) - (PTERINOPECTINIDAE) (FOSSIL)
- pseudoradiosa, Dumortieria pseudoradiosa (Branco, 1879 †) - (HILDOCERATIDAE) (FOSSIL)
- pseudoradula, Spondylus pseudoradula F. McCoy, 1886 † - (SPONDYLIDAE) (FOSSIL)
- pseudorakhiensis, Bicorbula pseudorakhiensis F.E. Eames, 1951 † - (CORBULIDAE) (FOSSIL)
- Pseudorapa, Genus Pseudorapa Holzapfel, 1888 (NEOGASTROPODA (UNASSIGNED)) (FOSSIL)
- Pseudoraphitoma, syn of: Genus Pseudorhaphitoma O. Bφttger, 1895 (MANGELIIDAE)
- pseudorarispina, Mauira pseudorarispina (H.H. Suter, 1915 †) - (VOLUTIDAE) (FOSSIL)
- pseudorbignyi, Fusiconus pseudorbignyi (D. Röckel & T.C. Lan, 1981) - (CONIDAE)
- pseudorbignyi, Bathyconus pseudorbignyi D. Röckel & T.C. Lan, 1981 - syn of: Fusiconus pseudorbignyi (D. Röckel & T.C. Lan, 1981) - (CONIDAE)
- Pseudorbis, Genus Pseudorbis T.A. de M. Monterosato, 1884 (SKENEIDAE)
- pseudoreas, Glessula pseudoreas (G. Nevill, 1881) - (SUBULINIDAE)
- pseudorecticosta, Uromitra pseudorecticosta Boettger, 1906 † - (COSTELLARIIDAE) (FOSSIL)
- pseudorecurvus, Brachidontes pseudorecurvus G.W. Nowell-Usticke, 1969 - syn of: Brachidontes modiolus (C. Linnaeus, 1767) - (MYTILIDAE)
- pseudoredemptus, Polinices pseudoredemptus Friedberg, 1923 † - (NATICIDAE) (FOSSIL)
- Pseudoredonia, Genus Pseudoredonia Sΰnchez, 2006 (REDONIIDAE) (FOSSIL)
- pseudoregularis, Neoleymeriella pseudoregularis (Seitz, 1930 †) - (LEYMERIELLIDAE) (FOSSIL)
- pseudorepressa, Ampullonatica pseudorepressa E. Robba, Pedriali & E. Quaggiotto, 2016 † - (AMPULLINIDAE) (FOSSIL)
- Pseudoretusa, syn of: Genus Pulicicochlea W.F. Ponder & R.U. Gooding, 1978 (EULIMIDAE)
- pseudorex, Mormula pseudorex (S. Nomura, 1936) - (PYRAMIDELLIDAE)
- Pseudorhaphitoma, Genus Pseudorhaphitoma O. Bφttger, 1895 (MANGELIIDAE)
- Pseudorhodea, syn of: Subgenus Rabdotus (Plicolumna) J.G. Cooper, 1895 (BULIMULIDAE)
- pseudorhodensis, Viviparus pseudorhodensis Datsenko in Gozhik & Datsenko, 2007 † - (VIVIPARIDAE) (FOSSIL)
- Pseudorhytidopilus, Genus Pseudorhytidopilus Cox, 1960 (ACMAEIDAE) (FOSSIL)
- Pseudorientalia, Genus Pseudorientalia P. Radoman, 1973 (HYDROBIIDAE)
- pseudorientalica, Islamia pseudorientalica P. Radoman, 1973 - (HYDROBIIDAE)
- Pseudorimula, Genus Pseudorimula J.H. McLean, 1989 (LEPETODRILIDAE)
- Pseudoringicula, Genus Pseudoringicula G.Y. Lin, 1980 (RINGICULIDAE)
- pseudorissensis, Ostrea pseudorissensis E.W. Vredenburg, 1928 † - (OSTREIDAE) (FOSSIL)
- pseudorissoi, Nuttallina pseudorissoi P.P. Carpenter in H.A. Pilsbry, 1893 - syn of: Lepidochitona caprearum (A. Scacchi, 1836) - (LEPIDOCHITONIDAE)
- Pseudorissoina, Subgenus Liostomia (Pseudorissoina) R. Tate & W.L. May, 1900 (PYRAMIDELLIDAE)
- pseudornata, Marginella pseudornata L. Bozzetti, 1992 - (MARGINELLIDAE)
- pseudorobusta, Carbonicola pseudorobusta Trueman † - (ANTHRACOSIIDAE) (FOSSIL)
- pseudorosea, Marginella pseudorosea S.G. Veldsman, 2013 - (MARGINELLIDAE)
- pseudorostralis, Tellina pseudorostralis Orbigny, 1850 † - (TELLINIDAE) (FOSSIL)
- Pseudorotella, syn of: Genus Teinostoma H. Adams & A. Adams, 1854 (TORNIDAE)
- pseudorothii, Monacha pseudorothii B. Hausdorf, 2003 - (HYGROMIIDAE)
- pseudorotula, Guidonia pseudorotula Gatto & Monari, 2010 † - (TROCHONEMATIDAE) (FOSSIL)
- Pseudorthoceras, Genus Pseudorthoceras Girty, 1912 (PSEUDORTHOCERATIDAE) (FOSSIL)
- PSEUDORTHOCERATIDAE Flower & Caster, 1935 - Family (CEPHALOPODA-NAUTILOIDEA [Subclass]-PSEUDORTHOCERIDA [Order]) (FOSSIL)
- Pseudorthonychia, Genus Pseudorthonychia Bandel & Frύda, 1999 (PSEUDORTHONYCHIIDAE) (FOSSIL)
- PSEUDORTHONYCHIIDAE Bandel & Frύda, 1999 - Family (GASTROPODA-NERITIMORPHA [Subclass]-CYCLONERITIMORPHA [Order]-NERITOPSOIDEA [Superfamily]) (FOSSIL)
- pseudorubra, Dendrodoris pseudorubra A. Pruvot-Fol, 1951 - (DENDRODORIDIDAE)
- pseudorudis, Arianta arbustorum pseudorudis (H.A. Schlesch, 1924) - (HELICIDAE)
- pseudorugata, Linopyrga pseudorugata (P. Marshall & R. Murdoch, 1921 †) - (PYRAMIDELLIDAE) (FOSSIL)
- pseudorugosa, Carinaria pseudorugosa A.J.B.M. Vayssière, 1904 - (CARINARIIDAE)
- pseudorugosa, Praerosaria pseudorugosa L. Dolin & P. Lozouet, 2004 † - (CYPRAEIDAE) (FOSSIL)
- pseudorugosus, Cenoceras pseudorugosus Pia, 1914 † - (CENOCERATIDAE) (FOSSIL)
- pseudorugulosa, Mangelia pseudorugulosa Scarponi & al., 2016 † - (MANGELIIDAE) (FOSSIL)
- pseudorusselli, Flemingites pseudorusselli Renz & Renz, 1948 † - syn of: Proptychitoides trigonalis (Arthaber, 1911 †) - (FLEMINGITIDAE) (FOSSIL)
- Pseudosabinella, Genus Pseudosabinella J.H. McLean, 1995 (EULIMIDAE)
- Pseudosabinia, Genus Pseudosabinia Morris & Skelton, 1995 (RADIOLITIDAE) (FOSSIL)
- Pseudosacculus, Genus Pseudosacculus Y. Hirase, 1928 (VELUTINIDAE)
- pseudosadleri, Viviparus pseudosadleri (Pavlov, 1925 †) - (VIVIPARIDAE) (FOSSIL)
- Pseudosageceras, Genus Pseudosageceras Diener , 1895 (HEDENSTROEMIIDAE) (FOSSIL)
- pseudosalmonea, Favartia pseudosalmonea Houart, 2016 - (MURICIDAE)
- Pseudosalpinx, syn of: Genus Calotrophon L.G. Hertlein & A. Strong, 1951 (MURICIDAE)
- Pseudosanguinolites, Genus Pseudosanguinolites Patte, 1929 (CARDIIDA (UNASSIGNED)) (FOSSIL)
- Pseudosaphtia, Genus Pseudosaphtia Winter, 2008 (HELICARIONIDAE)
- Pseudosaxicava, Genus Pseudosaxicava (MYIDA (UNASSIGNED)) (FOSSIL)
- Pseudosaynella, Genus Pseudosaynella Spath , 1923 (DESMOCERATIDAE) (FOSSIL)
- pseudoscabra, Doris pseudoscabra A. Pruvot-Fol, 1934 - (DORIDIDAE)
- pseudoscalaria, Melanopsis pseudoscalaria C.L.F. von Sandberger, 1886 † - (MELANOPSIDAE) (FOSSIL)
- pseudoscalaris, Epitonium pseudoscalaris G.B. Brocchi, 1814 - syn of: Gyroscala lamellosa (J.B.P.A. Lamarck, 1822) - (EPITONIIDAE)
- pseudoscalaris, Rissoina pseudoscalaris J.C. Melvill & R. Standen, 1901 - syn of: Opalia pseudoescalaris (J.C. Melvill & R. Standen, 1901) - (RISSOINIDAE)
- pseudoscalatus, Trypanostylus pseudoscalatus Assmann, 1924 † - (COELOSTYLINIDAE) (FOSSIL)
- Pseudoscalites, Genus Pseudoscalites Kittl, 1892 (PURPURINIDAE) (FOSSIL)
- pseudoscarabaeus, Pseudozonaria pseudoscarabaeus J.P.S. Grateloup, 1847 † - syn of: Fossacypraea eburnina (J.P.S. Grateloup, 1847 †) - (CYPRAEIDAE) (FOSSIL)
- pseudoscarabeus, Cypraea pseudoscarabeus J.P.S. Grateloup, 1847 † - syn of: Fossacypraea eburnina (J.P.S. Grateloup, 1847 †) - (CYPRAEIDAE) (FOSSIL)
- Pseudoscenella, Genus Pseudoscenella Starobogatov & Moskalev, 1987 (STENOTHECIDAE) (FOSSIL)
- Pseudoschartymites, Genus Pseudoschartymites Yang, 1987 (STENOGLAPHYRITIDAE) (FOSSIL)
- Pseudoschistoceras, Genus Pseudoschistoceras Teichert , 1944 (METALEGOCERATIDAE) (FOSSIL)
- PSEUDOSCHIZOGONIIDAE Bandel, 2009 - Family (GASTROPODA-VETIGASTROPODA [Subclass]-EOTOMARIOIDEA [Superfamily]) (FOSSIL)
- Pseudoschizogonium, Genus Pseudoschizogonium Kutassy, 1937 (PSEUDOSCHIZOGONIIDAE) (FOSSIL)
- Pseudoschloenbachia, Genus Pseudoschloenbachia Spath , 1921 (MUNIERICERATIDAE) (FOSSIL)
- Pseudoschwartziella, syn of: Genus Schwartziella G. Nevill, 1881 (ZEBINIDAE)
- Pseudoscilla, Genus Pseudoscilla O. Bφttger, 1901 (PYRAMIDELLIDAE)
- pseudoscintilla, Anisodonta pseudoscintilla W.F. Ponder, 1971 - (BASTEROTIIDAE)
- pseudoscissurata, Saccella pseudoscissurata H. Takeda, 1953 † - (NUCULANIDAE) (FOSSIL)
- pseudoscorpio, Lambis pseudoscorpio J.B.P.A. Lamarck, 1822 - syn of: Lambis robusta (W.J. Swainson, 1821) - (STROMBIDAE)
- pseudosebastiani, Marginella pseudosebastiani F. Mattavelli, 2001 - (MARGINELLIDAE)
- pseudosebastiani pseudodesjardini, Marginella pseudosebastiani pseudodesjardini R. Le Béon, 2012 - syn of: Marginella pseudodesjardini R. Le Béon, 2012 - (MARGINELLIDAE)
- pseudoseimkanensis, Proclydonautilus pseudoseimkanensis E.S. Sobolev, 1989 † - (CLYDONAUTILIDAE) (FOSSIL)
- Pseudosepia, Genus Pseudosepia A. Naef, 1923 (SEPIIDAE)
- pseudoseptum, Stereoplasmoceras pseudoseptum A.W. Grabau † - (STEREOPLASMOCERATIDAE) (FOSSIL)
- pseudoserpentinum, Harpoceras pseudoserpentinum Gabilly, 1973 † - (HILDOCERATIDAE) (FOSSIL)
- pseudoserratus, Nassarius pseudoserratus W. Adam & M. Glibert, 1976 † - (NASSARIIDAE) (FOSSIL)
- Pseudoserrulina, syn of: Genus Serrulina A. Mousson, 1873 (CLAUSILIIDAE)
- pseudoserrulus, Nassarius pseudoserrulus B.M. Landau & al., 2013 † - (NASSARIIDAE) (FOSSIL)
- Pseudosesara, Genus Pseudosesara Solem, 1962 (HELICARIONIDAE)
- Pseudosetia, Genus Pseudosetia T.A. de M. Monterosato, 1884 (RISSOIDAE)
- pseudosexagonum, Paradentalium pseudosexagonum (G.P. Deshayes, 1825) - (DENTALIIDAE)
- Pseudoshasticrioceras, Genus Pseudoshasticrioceras Delanoy, 1998 (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- pseudosheridani, Hemiphaedusa pseudosheridani (A. Zilch, 1954) - (CLAUSILIIDAE)
- Pseudoshirbuirnia, Genus Pseudoshirbuirnia Dietze, Callomon & al., 2005 (SONNINIIDAE) (FOSSIL)
- Pseudosilesites, Genus Pseudosilesites Egoian , 1969 (DESMOCERATIDAE) (FOSSIL)
- Pseudosimnia, Genus Pseudosimnia F.A. Schilder, 1927 (OVULIDAE)
- Pseudosimoceras, Genus Pseudosimoceras Spath, 1925 (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- pseudosimplex, Nordophiceras pseudosimplex Kummel, 1969 † - syn of: Nordophiceras karpinskii (Mojsisovics, 1886 †) - (MEEKOCERATIDAE) (FOSSIL)
- Pseudosinarica, syn of: Genus Pseudosimnia F.A. Schilder, 1927 (OVULIDAE)
- Pseudosirenites, Genus Pseudosirenites Arthaber , 1911 (TRACHYCERATIDAE) (FOSSIL)
- Pseudoskenella, Genus Pseudoskenella W.F. Ponder, 1973 (PYRAMIDELLIDAE)
- Pseudoskirroceras, Genus Pseudoskirroceras Wiedenmayer , 1980 (COELOCERATIDAE) (FOSSIL)
- pseudosolarium, Pecten pseudosolarium Hassan, 1953 † - (PECTINIDAE) (FOSSIL)
- Pseudosonneratia, Genus Pseudosonneratia Spath, 1925 (HOPLITIDAE) (FOSSIL)
- Pseudospatha, Genus Pseudospatha C.T. Simpson, 1900 (UNIONIDAE)
- pseudosphaericum, Praeglyphioceras pseudosphaericum (Frech, 1897 †) - (PRAEGLYPHIOCERATIDAE) (FOSSIL)
- pseudosphaericum itazuensis, Praeglyphioceras pseudosphaericum itazuensis Kolotukhina, 1938 † - (PRAEGLYPHIOCERATIDAE) (FOSSIL)
- pseudosphaerium, Pisidium pseudosphaerium J. Favre, 1927 - (SPHAERIIDAE)
- Pseudosphaerium, syn of: Genus Pisidium L. Pfeiffer, 1821 (SPHAERIIDAE)
- pseudospica, Pyrgula pseudospica B.M. Logvinenko & Y.I. Starobogatov, 1968 - (HYDROBIIDAE)
- pseudospinosa, Oistotrigonia pseudospinosa (de Loriol, 1882) † - (PTEROTRIGONIIDAE) (FOSSIL)
- Pseudospiraculum, Subgenus Pearsonia (Pseudospiraculum) W. Kobelt, 1902 (CYCLOPHORIDAE)
- pseudospirata, Drilliola pseudospirata (Orbigny, 1850 †) - (BORSONIIDAE) (FOSSIL)
- pseudospirata, Natica pseudospirata d'Orbigny, 1849 † - (NATICIDAE) (FOSSIL)
- Pseudospyroceras, Genus Pseudospyroceras Krφger , 2008 (ORTHOCERATIDAE) (FOSSIL)
- pseudostabilis, Laciniaria pseudostabilis (C.A. Westerlund, 1901) - (CLAUSILIIDAE)
- pseudostagnalis, Peringia ulvae pseudostagnalis C. De Stefani, 1877 † - (HYDROBIIDAE) (FOSSIL)
- Pseudostenopoceras, Genus Pseudostenopoceras Shimanskiy, 1967 (PLEURONAUTILIDAE) (FOSSIL)
- Pseudostenorhytis, syn of: Genus Sthenorytis T.A. Conrad, 1862 (EPITONIIDAE)
- Pseudostenorytis, syn of: Genus Sthenorytis T.A. Conrad, 1862 (EPITONIIDAE)
- Pseudostephanites, Genus Pseudostephanites Zhao & Liang, 1965 (TAPASHANITIDAE) (FOSSIL)
- Pseudostomatella, Genus Pseudostomatella K.H.J. Thiele, 1921 (TROCHIDAE)
- Pseudostreptaxis, Subgenus Aulacospira (Pseudostreptaxis) O.F. von Mφllendorff, 1890 (HYPSELOSTOMATIDAE)
- Pseudostreptostyla, syn of: Genus Ferussacia A. Risso, 1826 (FERUSSACIIDAE)
- pseudostriaries, Agassiceras pseudostriaries Dommergues & Corna, 2014 † - (ARIETITIDAE) (FOSSIL)
- pseudostriatum, Liparoceras pseudostriatum Trueman, 1919 † - (LIPAROCERATIDAE) (FOSSIL)
- pseudostricta, Turbonilla pseudostricta F. Nordsieck, 1972 - syn of: Turbonilla pumila G. Seguenza, 1876 - (PYRAMIDELLIDAE)
- pseudostrigifer, Strigoceras pseudostrigifer Maubeuge, 1955 † - (STRIGOCERATIDAE) (FOSSIL)
- pseudostrigillata, Apachella pseudostrigillata (Girty, 1934 †) - (GOSSELETINIDAE) (FOSSIL)
- Pseudostrombus, syn of: Genus Bullia J.E. Gray in E. Griffith & E. Pidgeon, 1834 (NASSARIIDAE)
- Pseudostrombus, syn of: Genus Bullia J.E. Gray in E. Griffith & E. Pidgeon, 1834 (NASSARIIDAE)
- pseudostupa, Gemmula pseudostupa (T.C. Cheng & Y.C. Lee, 2011) - (TURRIDAE)
- pseudostupa, Ptychosyrinx pseudostupa T.C. Cheng & Y.C. Lee, 2011 - syn of: Gemmula pseudostupa (T.C. Cheng & Y.C. Lee, 2011) - (TURRIDAE)
- pseudosturanii, Acicula pseudosturanii Kadolsky, 2008 † - (ACICULIDAE) (FOSSIL)
- pseudosubaequalis, Ptychosyrinx pseudosubaequalis C. Nielsen, 2003 † - (TURRIDAE) (FOSSIL)
- pseudosubdentatus, Pseudocatillus pseudosubdentatus Chelidze, 1975 † - (CARDIIDAE) (FOSSIL)
- Pseudosubplanites, Genus Pseudosubplanites Le Hegarat, 1973 (NEOCOMITIDAE) (FOSSIL)
- Pseudosubplanulites, syn of: Genus Pseudosubplanites Le Hegarat, 1973 (NEOCOMITIDAE) (FOSSIL)
- pseudosubstriata, Vertigo pseudosubstriata V. Ložek, 1954 - (VERTIGINIDAE)
- pseudosubtilis, Surcula pseudosubtilis M.A. Peyrot, 1931 † - syn of: Pleurofusia pseudosubtilis (M.A. Peyrot, 1931 †) - (CLAVATULIDAE) (FOSSIL)
- pseudosubtilis, Pleurofusia pseudosubtilis (M.A. Peyrot, 1931 †) - (TURRIDAE) (FOSSIL)
- pseudosubulata, Melanopsis pseudosubulata R.B. Newton, 1891 † - (MELANOPSIDAE) (FOSSIL)
- Pseudosubulina, Genus Pseudosubulina H. Strebel & G.J. Pfeffer, 1882 (SPIRAXIDAE)
- pseudosuccinea, Lamprocystis pseudosuccinea (O.F. von Möllendorff, 1893) - (EUCONULIDAE)
- Pseudosuccinea, Genus Pseudosuccinea F.C. Baker, 1908 (LYMNAEIDAE)
- pseudosuccinea, Simpulopsis pseudosuccinea (S. Moricand, 1836) - (SIMPULOPSIDAE)
- pseudosugimotonis, Pinguiphaedusa sugimotonis pseudosugimotonis (H. Minato & A. Tada, 1978) - (CLAUSILIIDAE)
- pseudosulcata, Obstopalia pseudosulcata R.N. Kilburn, 1985 - syn of: Bouryiscala turrisphari (C. Hedley, 1905) - (EPITONIIDAE)
- pseudosulcata, Agrawalimya pseudosulcata Singh & al., 1982 † - (PHOLADOMYIDAE) (FOSSIL)
- pseudosulcospira, Paracrostoma pseudosulcospira (R.A.M. Brandt, 1968) - (PACHYCHILIDAE)
- pseudosulcospira, Brotia pseudosulcospira R.A.M. Brandt, 1968 - syn of: Paracrostoma pseudosulcospira (R.A.M. Brandt, 1968) - (PACHYCHILIDAE)
- pseudosulcospira armata, Paracrostoma pseudosulcospira armata R.A.M. Brandt, 1968 - syn of: Paracrostoma armata (R.A.M. Brandt, 1968) - (PACHYCHILIDAE)
- pseudosulcospira subabiari, Paracrostoma pseudosulcospira subabiari (R.A.M. Brandt, 1968) - (PACHYCHILIDAE)
- pseudosulculosa, Simpulopsis pseudosulculosa A.S.H. Breure, 1975 - (SIMPULOPSIDAE)
- pseudosuperbus, Chicomurex pseudosuperbus R. Houart, C.O. Moe & C. Chen, 2015 - (MURICIDAE)
- pseudosuturalis, Turritella pseudosuturalis A.V.M.D. D'Orbigny, 1852 † - (TURRITELLIDAE) (FOSSIL)
- Pseudosvalbardiceras, Genus Pseudosvalbardiceras Dagis & Ermakova, 1988 (SIBIRITIDAE) (FOSSIL)
- Pseudosverdrupites, Genus Pseudosverdrupites Kutygin, 1996 (SPIROLEGOCERATIDAE) (FOSSIL)
- pseudosyngenes, Alvania pseudosyngenes A. Warén, 1973 - (RISSOIDAE)
- pseudosyrenosa, Helicella pseudosyrenosa E. Caziot - syn of: Helicella itala (C. Linnaeus, 1758) - (HYGROMIIDAE)
- Pseudosyrinx, syn of: Genus Calotrophon L.G. Hertlein & A. Strong, 1951 (MURICIDAE)
- Pseudotachea, Genus Pseudotachea C.R. Bφttger, 1909 (HELICIDAE)
- Pseudotalopia, Genus Pseudotalopia T. Habe, 1961 (TROCHIDAE)
- Pseudotaphrus, Genus Pseudotaphrus Cossmann, 1888 (ZEBINIDAE) (FOSSIL)
- Pseudotaranis, Genus Pseudotaranis J.H. McLean, 1995 (PSEUDOMELATOMIDAE)
- pseudotaranis, Hortia pseudotaranis Y.I. Kantor, P. Lozouet, N. Puillandre & P. Bouchet, 2014 - (PYRAMIMITRIDAE)
- Pseudotechnophorus, Genus Pseudotechnophorus Kobayashi , 1933 (ISCHYRINIIDAE) (FOSSIL)
- pseudotectum, Indomodulus pseudotectum B.M. Landau, G.J. Vermeij & S. Reich, 2014 † - (MODULIDAE) (FOSSIL)
- Pseudotectus, Genus Pseudotectus Perner, 1903 (PSEUDOPHORIDAE) (FOSSIL)
- Pseudotellidora, Genus Pseudotellidora M. Huber, Langleit & Kreipl, 2015 (TELLINIDAE)
- Pseudoteloceras, Genus Pseudoteloceras Pavia & Fernandez-Lopez, 2016 (STEPHANOCERATIDAE) (FOSSIL)
- Pseudotemnocheilus, Genus Pseudotemnocheilus Ruzhentsev & Shimanskiy, 1954 (TAINOCERATIDAE) (FOSSIL)
- Pseudotemperoceras, Genus Pseudotemperoceras Stschastlivtseva, 1986 (ORTHOCERIDA (UNASSIGNED)) (FOSSIL)
- pseudotenuis, Gyraulus pseudotenuis (F.M. Hilgendorf, 1867 ) - (PLANORBIDAE)
- pseudoterebralis, Turbonilla pseudoterebralis F. Sacco, 1892 † - (PYRAMIDELLIDAE) (FOSSIL)
- pseudoteres, Ovatipsa rashleighana pseudoteres (F.Jr. Lorenz & J.P. Barbier, 1992) - (CYPRAEIDAE)
- pseudoteresae, Chondrina pseudoteresae Ahuir & Torres, 2017 - (CHONDRINIDAE)
- pseudotethis, Turritella pseudotethis E.W. Vredenburg, 1928 † - (TURRITELLIDAE) (FOSSIL)
- pseudotetrodon, Carychium pseudotetrodon Strauch, 1977 † - (ELLOBIIDAE) (FOSSIL)
- Pseudoteudopsis, Genus Pseudoteudopsis Riccardi, 2016 (PLESIOTEUTHIDIDAE) (FOSSIL)
- pseudotexanum, Texanites pseudotexanum Spath 1932 † - (COLLIGNONICERATIDAE) (FOSSIL)
- pseudotextilis, Conus pseudotextilis J.P.S. Grateloup, 1895 † - (CONIDAE) (FOSSIL)
- Pseudotheca, syn of: Genus Helcionella Grabau & Shimer, 1909 (HELCIONELLIDAE) (FOSSIL)
- pseudotheeli, Gastrocopta pseudotheeli Steklov, 1966 † - (GASTROCOPTIDAE) (FOSSIL)
- Pseudothersitea, Genus Pseudothersitea Savornin, 1914 (THERSITEIDAE) (FOSSIL)
- Pseudothetidites, Genus Pseudothetidites Jeannet , 1958 (THETIDITIDAE) (FOSSIL)
- pseudothomae, Conus pseudothomae G.B. I Sowerby, 1858 - syn of: Kalloconus pulcher (J. Lightfoot, 1786) - (CONIDAE)
- pseudothomae, Conus pseudothomae L.A. Reeve, 1844 - syn of: Lindaconus spurius (J.F. Gmelin, 1791) - (CONIDAE)
- pseudothomae, Iniforis pseudothomae E. Rolán & R. Fernández-Garcés, 1993 - (TRIPHORIDAE)
- Pseudothurmannia, Genus Pseudothurmannia Spath , 1923 (CRIOCERATITIDAE) (FOSSIL)
- pseudothurmannii, Balearites pseudothurmannii Dimitrova, 1967 † - (CRIOCERATITIDAE) (FOSSIL)
- pseudotiara, Pirenella picta pseudotiara (A.V.M.D. D'Orbigny, 1852 †) - (POTAMIDIDAE) (FOSSIL)
- pseudotiarella, Tiaracerithium pseudotiarella A.V.M.D. D'Orbigny, 1852 † - (BATILLARIIDAE) (FOSSIL)
- pseudotiarella, Cerithium pseudotiarella A.V.M.D. D'Orbigny, 1852 † - syn of: Tiaracerithium pseudotiarella A.V.M.D. D'Orbigny, 1852 † - (CERITHIIDAE) (FOSSIL)
- pseudotiarella, Pirenella pseudotiarella (Orbigny, 1852 †) - (POTAMIDIDAE) (FOSSIL)
- pseudotiarella pictoides, Pirenella pseudotiarella pictoides A.E.M. Cossmann & M.A. Peyrot, 1922 † - (POTAMIDIDAE) (FOSSIL)
- Pseudotibetites, Genus Pseudotibetites Jeannet, 1958 (CERATITIDA (UNASSIGNED)) (FOSSIL)
- pseudotigris, Grandinenia fuchsi pseudotigris H. Nordsieck, 2012 - (CLAUSILIIDAE)
- pseudotimorensis, Metapronorites pseudotimorensis (Miller, 1930 †) - (PRONORITIDAE) (FOSSIL)
- Pseudotindaria, syn of: Genus Neilonella G. Seguenza, 1877 (NEILONELLIDAE)
- Pseudotirolites, Genus Pseudotirolites Sun , 1933 (PSEUDOTIROLITIDAE) (FOSSIL)
- PSEUDOTIROLITIDAE Zhao, 1965 - Family (CEPHALOPODA-AMMONOIDEA [Subclass]-CERATITIDA [Order]-XENODISCOIDEA [Superfamily]) (FOSSIL)
- Pseudotissotia, Genus Pseudotissotia Peron, 1887 (PSEUDOTISSOTIIDAE) (FOSSIL)
- PSEUDOTISSOTIDAE - syn of Family: PSEUDOTISSOTIIDAE (FOSSIL)
- PSEUDOTISSOTIIDAE Hyatt, 1903 - Family (CEPHALOPODA-AMMONOIDEA [Subclass]-AMMONITIDA [Order]-ACANTHOCERATOIDEA [Superfamily]) (FOSSIL)
- Pseudotitanoceras, Genus Pseudotitanoceras Shimansky, 1965 (PLEURONAUTILIDAE) (FOSSIL)
- Pseudotoceras, Genus Pseudotoceras Ruzhencev , 1962 (ARAXOCERATIDAE) (FOSSIL)
- Pseudotoites, Genus Pseudotoites Arkell, 1954 (OTOITIDAE) (FOSSIL)
- Pseudotoma, Subgenus Genotia (Pseudotoma) Cooke, 1928 (TURRIDAE) (FOSSIL)
- Pseudotonicia, Genus Pseudotonicia E.A. Ashby, 1928 (ACANTHOCHITONIDAE)
- Pseudotorellia, Genus Pseudotorellia A. Warιn, 1989 (VELUTINIDAE)
- Pseudotorina, syn of: Genus Pseudotorinia F. Sacco, 1892 (ARCHITECTONICIDAE)
- Pseudotorinia, Genus Pseudotorinia F. Sacco, 1892 (ARCHITECTONICIDAE)
- pseudotorosum, Rursiceras pseudotorosum Prieser, 1937 † - (ASPIDOCERATIDAE) (FOSSIL)
- pseudotorticula, Inella pseudotorticula E. Rolán & H.G. Lee, 2008 - (TRIPHORIDAE)
- pseudotortum, Farcimen pseudotortum C. de la Torre & P. Bartsch, 1942 - (MEGALOMASTOMIDAE)
- pseudotortum bayamense, Farcimen pseudotortum bayamense C. de la Torre & P. Bartsch, 1942 - (MEGALOMASTOMIDAE)
- pseudotortum turquinense, Farcimen pseudotortum turquinense C. de la Torre & P. Bartsch, 1942 - (MEGALOMASTOMIDAE)
- Pseudotoucasia, Genus Pseudotoucasia Douvillι, 1911 (REQUIENIIDAE) (FOSSIL)
- Pseudotoxeuma, Genus Pseudotoxeuma Shimanskiy , 1963 (TOXEUMORPHORIDAE) (FOSSIL)
- pseudotransiens, Allaegopis meridionalis pseudotransiens F. Riedel, 1993 - (ZONITIDAE)
- Pseudotrapezium, Genus Pseudotrapezium Fischer, 1887 (ARCTICIDAE) (FOSSIL)
- Pseudotrichia, Genus Pseudotrichia I.M. Likharev, 1949 (HYGROMIIDAE)
- Pseudotricula, Genus Pseudotricula N.T. Dang & T.H. Ho, 2006 (POMATIOPSIDAE)
- pseudotriton, Pyrgula pseudotriton A.N. Golikov & Y.I. Starobogatov, 1966 - syn of: Turricaspia bogensis (F. Dubois De Montpéreux in H.C. Küster, 1852) - (HYDROBIIDAE)
- Pseudotritonia, Genus Pseudotritonia K.H.J. Thiele, 1912 (CHARCOTIIDAE)
- PSEUDOTRITONIIDAE Golikov & Starobogatov, 1987 - Family (GASTROPODA-CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]) (FOSSIL)
- Pseudotritonium, Genus Pseudotritonium Batten & Stokes, 1986 (PSEUDOTRITONIIDAE) (FOSSIL)
- pseudotrivellona, Trivirostra pseudotrivellona D. Fehse & J. Grego, 2008 - (TRIVIIDAE)
- Pseudotrivia, syn of: Genus Trivellona T. Iredale, 1931 (TRIVIIDAE)
- pseudotrivolvis, Planorbella pseudotrivolvis F.C. Baker, 1920 - (PLANORBIDAE)
- Pseudotrizona, Genus Pseudotrizona Groenenberg, Subai & E. Gittenberger, 2016 (HELICIDAE)
- Pseudotrochatella, Genus Pseudotrochatella G. Nevill, 1891 (HELICINIDAE)
- pseudotrochula, Plectotropis pseudotrochula (A.R.J.B. Bavay & P. Dautzenberg, 1908) - (BRADYBAENIDAE)
- Pseudotrochus, syn of: Genus Pseudachatina J.A. Albers, 1850 (ACHATINIDAE)
- pseudotrolli, Vitrea pseudotrolli I. Pintér, 1983 - (PRISTILOMATIDAE)
- Pseudotropites, Genus Pseudotropites Canavari, 1882 (ARIETITIDAE) (FOSSIL)
- pseudotruckmanni, Pseudogrammoceras pseudotruckmanni Gabilly, 1975 † - (HILDOCERATIDAE) (FOSSIL)
- Pseudotruncatella, syn of: Genus Renea B.D. Neville, 1880 (ACICULIDAE)
- pseudotruncatum, Cenoceras pseudotruncatum Crick, 1931 † - (CENOCERATIDAE) (FOSSIL)
- Pseudotryonia, Genus Pseudotryonia R. Hershler, 2001 (HYDROBIIDAE)
- Pseudotubina, Genus Pseudotubina Koken, 1896 (TUBINIDAE) (FOSSIL)
- pseudotulipus, Modiolus americanus pseudotulipus A.A. Olsson, 1961 - (MYTILIDAE)
- pseudotumida, Gibbula pseudotumida F. Nordsieck, 1982 - (TROCHIDAE)
- pseudotumulus, Zonaria pseudotumulus B.M. Landau & Groves, 2011 † - (CYPRAEIDAE) (FOSSIL)
- pseudoturbinella, Terebra pseudoturbinella F.F. Talavera, 1975 - syn of: Terebra reticularis (V. Pecchioli in F. Sacco, 1891) - (TEREBRIDAE)
- pseudoturbonilla, Eulimella pseudoturbonilla A. Peñas & E. Rolán, 2016 - (PYRAMIDELLIDAE)
- pseudoturbonilla, Terebra pseudoturbonilla F.F. Talavera, 1975 - syn of: Terebra reticularis (V. Pecchioli in F. Sacco, 1891) - (TEREBRIDAE)
- Pseudoturcica, Genus Pseudoturcica Bandel, 2010 (PSEUDOTURCICIDAE) (FOSSIL)
- PSEUDOTURCICIDAE Bandel, 2010 - Family (GASTROPODA-VETIGASTROPODA [Subclass]-SEGUENZIOIDEA [Superfamily]) (FOSSIL)
- pseudoturgida, Venus pseudoturgida Orbigny, 1852 † - (VENERIDAE) (FOSSIL)
- pseudoturneri, Arnioceras pseudoturneri L.F. Spath, 1956 † - (ARIETITIDAE) (FOSSIL)
- pseudoturris, Euglandina pseudoturris (H. Strebel, 1875) - (SPIRAXIDAE)
- pseudoturritella, Vermetus milleti pseudoturritella Boettger, 1906 † - (VERMETIDAE) (FOSSIL)
- pseudoturtoni, Trophon pseudoturtoni Wood, 1879 † - (MURICIDAE) (FOSSIL)
- pseudotwilae, Epifungium pseudotwilae E. Gittenberger & A. Gittenberger, 2005 - (EPITONIIDAE)
- Pseudotylostoma, Genus Pseudotylostoma Ihering, 1903 (GASTROPODA INCERTAE SEDIS) (FOSSIL)
- Pseudoughligella, syn of: Subgenus Desmoceras (Pseudouhligella) Reyment, 1955 (DESMOCERATIDAE) (FOSSIL)
- Pseudouhligella, Subgenus Desmoceras (Pseudouhligella) Reyment, 1955 (DESMOCERATIDAE) (FOSSIL)
- pseudoumbonata, Palaeomutela pseudoumbonata Gusev † - (PALAEOMUTELIDAE) (FOSSIL)
- pseudoumbonella, Costacallista pseudoumbonella E.W. Vredenburg, 1928 † - (VENERIDAE) (FOSSIL)
- pseudoundulatus, Turbo pseudoundulatus E.W. Vredenburg, 1928 † - (TURBINIDAE) (FOSSIL)
- pseudouralensis, Eurasenia pseudouralensis Mesezhnikov, 1984 † - (AULACOSTEPHANIDAE) (FOSSIL)
- pseudourbani, Ancyloceras pseudourbani Sinzow, 1905 † - (ANCYLOCERATIDAE) (FOSSIL)
- Pseudovaccinites, Genus Pseudovaccinites Sιnesse, 1946 (HIPPURITIDAE) (FOSSIL)
- Pseudovaldedorsella, Genus Pseudovaldedorsella Cecca & al., 1998 (HOLCODISCIDAE) (FOSSIL)
- pseudovalvatoides, Muellerpalia pseudovalvatoides T.A. Neubauer, M. Harzhauser, A. Kroh, E. Georgopoulou & O. Mandic, - (HYDROBIIDAE) (FOSSIL)
- pseudovarai, Bullockus pseudovarai W.G. Lyons & Snyder, 2008 - (FASCIOLARIIDAE)
- pseudovariabilis, Staja pseudovariabilis N.I. Andrusov, 1905 † - (HYDROBIIDAE) (FOSSIL)
- Pseudovaricia, Genus Pseudovaricia Tate, 1888 (NEOGASTROPODA (UNASSIGNED)) (FOSSIL)
- pseudovaricosum, Neokentroceras pseudovaricosum Spath, 1922 † - (BRANCOCERATIDAE) (FOSSIL)
- Pseudovascoceras, Genus Pseudovascoceras Zaborski , 1996 (ACANTHOCERATIDAE) (FOSSIL)
- pseudovatum, Ovaticeras pseudovatum Buckman, 1918 † - syn of: Ovaticeras ovatum (A.T. Young & Bird, 1822 †) - (HILDOCERATIDAE) (FOSSIL)
- pseudovatus, Baculites pseudovatus Elias, 1933 † - (BACULITIDAE) (FOSSIL)
- Pseudoveletuceta, Subgenus Glycymeris (Pseudoveletuceta) Tashiro, 1971 (GLYCYMERIDIDAE) (FOSSIL)
- pseudoventricosa, Sandbergeria pseudoventricosa (Orbigny, 1850 †) - (DIASTOMATIDAE) (FOSSIL)
- PSEUDOVERMIDAE Thiele, 1931 - Family (GASTROPODA-HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]-FIONOIDEA [Superfamily])
- Pseudovermis, Genus Pseudovermis Perejslawzewa, 1891 (PSEUDOVERMIDAE)
- pseudovermis, Pelicaria pseudovermis (J.A. Bartrum & Powell, 1928) - (STRUTHIOLARIIDAE)
- pseudovernicosa, Vilasina pseudovernicosa I.N.V. Ivanova in O.A. Scarlato, 1981 - syn of: Vilasina vernicosa (A.T. von Middendorff, 1849) - (MYTILIDAE)
- Pseudoveronicella, Genus Pseudoveronicella J. Germain, 1908 (VERONICELLIDAE)
- pseudoverrucosa, Doris pseudoverrucosa H.F.A. von Ihering, 1886 - syn of: Doris verrucosa C. Linnaeus, 1758 - (DORIDIDAE)
- pseudoverrucosa, Flabellina pseudoverrucosa (A.V. Martynov, Sanamyan & T.A. Korshunova, 2015) - (FLABELLINIDAE)
- pseudoverrucosa, Coryphella pseudoverrucosa A.V. Martynov, Sanamyan & T.A. Korshunova, 2015 - syn of: Flabellina pseudoverrucosa (A.V. Martynov, Sanamyan & T.A. Korshunova, 2015) - (FLABELLINIDAE)
- Pseudovertagus, Genus Pseudovertagus L. Vignal, 1904 (CERITHIIDAE)
- pseudovesicularis, Phygraea pseudovesicularis (Gümbel, 1861 †) - (GRYPHAEIDAE) (FOSSIL)
- Pseudovestia, Subgenus Macrogastra (Pseudovestia) H. Nordsieck, 1977 (CLAUSILIIDAE)
- Pseudovidrioceras, Genus Pseudovidrioceras Ruzhencev , 1936 (MARATHONITIDAE) (FOSSIL)
- pseudovillei, Ambigostrea pseudovillei N. Malchus, 1990 † - (OSTREIDAE) (FOSSIL)
- pseudovinosa, Lyncina pseudovinosa F.A. Schilder, 1927 - syn of: Lyncina camelopardalis (G. Perry, 1811) - (CYPRAEIDAE)
- Pseudovirgatites, Genus Pseudovirgatites Vetters, 1905 (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- pseudovirgatus, Ischnochiton pseudovirgatus P. Kaas, 1972 - (ISCHNOCHITONIDAE)
- Pseudovishnuites, syn of: Genus Vishnuites Diener , 1897 (OPHICERATIDAE) (FOSSIL)
- pseudovisurgis, Nerinea pseudovisurgis Hudleston † - (NERINEIDAE) (FOSSIL)
- pseudovitrea, Uberella pseudovitrea (Finlay, 1924 †) - (NATICIDAE) (FOSSIL)
- Pseudovitrea, syn of: Genus Hawaiia G.P.L.K. Gude, 1911 (PRISTILOMATIDAE)
- pseudovittata, Cochlis pseudovittata E. Robba, Pedriali & E. Quaggiotto, 2016 † - (NATICIDAE) (FOSSIL)
- Pseudovivipara, Genus Pseudovivipara T.N. Annandale, 1918 (BITHYNIIDAE)
- Pseudovola, Genus Pseudovola Lissajous, 1923 (PTERIIDA (UNASSIGNED)) (FOSSIL)
- pseudovukotinovici, Viviparus pseudovukotinovici E. Jekelius, 1932 † - (VIVIPARIDAE) (FOSSIL)
- pseudovulanensis, Colchidites pseudovulanensis Kakabadze & Hoedemaeker, 2004 † - (ANCYLOCERATIDAE) (FOSSIL)
- pseudovularis, Euchondrus pseudovularis (L. Forcart, 1981) - (ENIDAE)
- pseudovulata, Triviella pseudovulata F.A. Schilder & M. Schilder, 1929 - (TRIVIIDAE)
- Pseudowaagenia, Genus Pseudowaagenia Spath, 1931 (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- pseudowaelii, Streptochetus pseudowaelii E.W. Vredenburg, 1925 † - (FASCIOLARIIDAE) (FOSSIL)
- Pseudowarthia, Genus Pseudowarthia Qiao, 1983 (BELLEROPHONTIDA (UNASSIGNED)) (FOSSIL)
- pseudoweinkauffi, Gari pseudoweinkauffi R. von Cosel, 1989 - (PSAMMOBIIDAE)
- Pseudowenites, syn of: Genus Owenites Hyatt & Smith, 1905 (MELAGATHICERATIDAE) (FOSSIL)
- pseudowillemeti, Crommium pseudowillemeti F.E. Eames, 1952 † - (AMPULLINIDAE) (FOSSIL)
- pseudowilmotii, Venericardia pseudowilmotii C.J. Maury, 1924 † - (CARDITIDAE) (FOSSIL)
- Pseudowortheniella, Genus Pseudowortheniella Bandel , 2009 (PSEUDOWORTHENIELLIDAE) (FOSSIL)
- PSEUDOWORTHENIELLIDAE Bandel, 2009 - Family (GASTROPODA-VETIGASTROPODA [Subclass]-SCHIZOGONIOIDEA [Superfamily]) (FOSSIL)
- pseudoxalonica, Cernuella pseudoxalonica E. Caziot, 1910 - syn of: Cernuella virgata (E.M. Da Costa, 1778) - (HYGROMIIDAE)
- Pseudoxerophila, syn of: Genus Helicella A.E.J. Fιrussac, 1821 (HYGROMIIDAE)
- Pseudoxybeloceras, Genus Pseudoxybeloceras Wright & Matsumoto, 1954 (DIPLOMOCERATIDAE) (FOSSIL)
- Pseudoxychona, Subgenus Leiostracus (Pseudoxychona) H.A. Pilsbry, 1930 (SIMPULOPSIDAE)
- Pseudoxyperas, syn of: Genus Oxyperas O.A.L. Mφrch, 1853 (MACTRIDAE)
- Pseudoyaadia, Genus Pseudoyaadia Cooper & Leanza, 2017 (STEINMANELLIDAE) (FOSSIL)
- Pseudoyangtzespira, syn of: Genus Oelandiella Vostokova , 1962 (HELCIONELLIDAE) (FOSSIL)
- pseudoyawensis, Costacallista pseudoyawensis Iqbal, 1969 † - (VENERIDAE) (FOSSIL)
- pseudoyo, Ringsteadia pseudoyo Salfeld, 1917 † - (AULACOSTEPHANIDAE) (FOSSIL)
- pseudoyoungi, Mucrodactylites pseudoyoungi (Guex, 1972 †) - (DACTYLIOCERATIDAE) (FOSSIL)
- pseudoyoungi, Collina pseudoyoungi Guex, 1972 † - syn of: Mucrodactylites pseudoyoungi (Guex, 1972 †) - (DACTYLIOCERATIDAE) (FOSSIL)
- pseudozilchi, Nematurella pseudozilchi T. Kowalke & Reichenbacher, 2005 † - (HYDROBIIDAE) (FOSSIL)
- Pseudozonaria, Genus Pseudozonaria F.A. Schilder, 1927 (CYPRAEIDAE)
- pseudozyga, Palaeostylus pseudozyga Batten, 1985 † - (PALAEOSTYLIDAE) (FOSSIL)
- Pseudozygopleura, Genus Pseudozygopleura Knight, 1930 (PSEUDOZYGOPLEURIDAE) (FOSSIL)
- PSEUDOZYGOPLEURIDAE Knight, 1930 - Family (GASTROPODA-CAENOGASTROPODA [Subclass]) (FOSSIL)
- pseudumbilicare, Trigonostoma pseudumbilicare M.A. Peyrot, 1925 † - (CANCELLARIIDAE) (FOSSIL)
- Pseudunela, Genus Pseudunela L. Salvini-Plawιn, 1973 (PSEUDUNELIDAE)
- PSEUDUNELIDAE Rankin, 1979 - Family (GASTROPODA-HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-ACOCHLIDIACEA [Order]-ACOCHLIDIOIDEA [Superfamily])
- Pseudunio, Subgenus Margaritifera (Pseudunio) F. Haas, 1910 (MARGARITIFERIDAE)
- Pseuduptonia, Genus Pseuduptonia Pia, 1913 (PHRICODOCERATIDAE) (FOSSIL)
- pseustes, Macrochlamys pseustes E.A. Smith - (ARIOPHANTIDAE)
- pseustes, Naplesites pseustes (A.H. Clarke, 1897 †) - (BELOCERATIDAE) (FOSSIL)
- pseustes, Anabeloceras pseustes A.H. Clarke, 1897 † - syn of: Naplesites pseustes (A.H. Clarke, 1897 †) - (BELOCERATIDAE) (FOSSIL)
- pseustes, Helenoconcha pseustes G.A. Solem - (CHAROPIDAE)
- pseustes, Cardiomya pseustes W.H. Dall, 1908 - syn of: Cardiomya planetica (W.H. Dall, 1908) - (CUSPIDARIIDAE)
- pseustes, Cystiscus pseustes (E.A. Smith, 1904) - (CYSTISCIDAE)
- pseustes, Marginella pseustes E.A. Smith, 1904 - syn of: Cystiscus pseustes (E.A. Smith, 1904) - (MARGINELLIDAE)
- pseustes, Granulina pseustes E.A. Smith, 1904 - syn of: Cystiscus pseustes (E.A. Smith, 1904) - (MARGINELLIDAE)
- pseustes, Natica pseustes Watson, 1887 - (NATICIDAE)
- pseustes, Rissoa pseustes E.A. Smith, 1890 - (RISSOIDAE)
- pseutella, Cyclocardia pseutella J. Marwick, 1929 † - (CARDITIDAE) (FOSSIL)
- pseutes, Cardiomya pseutes W.H. Dall, 1908 - syn of: Cardiomya planetica (W.H. Dall, 1908) - (CUSPIDARIIDAE)
- pseuydobeliscus, Drillia pseuydobeliscus (P. Fischer & R. Tournouer, 1873 †) - (DRILLIIDAE) (FOSSIL)
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