- paagoumenei, Atagema paagoumenei (J.J. Risbec, 1928) - (DISCODORIDIDAE)
- paalensis, Achatinella apexfulva paalensis D.A. Welch, 1942 - (ACHATINELLIDAE)
- paardekooperi, Odostomia paardekooperi J.J. Van Aartsen, E. Gittenberger & J. Goud, 1998 - (PYRAMIDELLIDAE)
- paatsi, Alvania paatsi H.J. Hoenselaar & J. Goud, 1998 - (RISSOIDAE)
- pabloensis, Pseudocardium pabloensis A. Packard in Clark, 1915 † - (MACTRIDAE) (FOSSIL)
- pabloensis, Neverita pabloensis Clark, 1915 † - (NATICIDAE) (FOSSIL)
- pabloensis, Leptopecten pabloensis (T.A. Conrad, 1857 †) - (PECTINIDAE) (FOSSIL)
- pabloi, Quirella pabloi Peñas & Rolán, 2017 - (PYRAMIDELLIDAE)
- pablopenasi, Turbonilla pablopenasi A. Peñas, E. Rolán & F. Swinnen, 2014 - (PYRAMIDELLIDAE)
- paboensis, Nucula paboensis A.A. Olsson, 1931 † - (NUCULIDAE) (FOSSIL)
- pabsti, Barcania pabsti R.A.M. Brandt, 1956 - (CLAUSILIIDAE)
- pabsti, Sphyradium pabsti (R.A.M. Brandt, 1956) - (ORCULIDAE)
- pacalis, Helictites pacalis Tozer, 1994 † - (THETIDITIDAE) (FOSSIL)
- pacamoni, Bursa pacamoni H.R. Matthews & A.C. dos Santos Coelho, 1971 - syn of: Bursa grayana R.W. Dunker, 1862 - (BURSIDAE)
- pacanana, Pterorytis pacanana DeVries, 2005 † - (MURICIDAE) (FOSSIL)
- pacator, Bufonaria pacator T. Iredale, 1931 - syn of: Bufonaria margaritula (G.P. Deshayes, 1832) - (BURSIDAE)
- pacator, Gyrineum pacator T. Iredale, 1931 - syn of: Bufonaria margaritula (G.P. Deshayes, 1832) - (RANELLIDAE)
- pacatus, Stagonites pacatus P.A. Zhuravleva, 1972 † - syn of: Raphanites bogoslovskyi (P.A. Zhuravleva, 1972 †) - (DISCOSORIDA (unassigned)) (FOSSIL)
- pacaudi, Aspella pacaudi Goret, Ledon & Pons, 2013 † - (MURICIDAE) (FOSSIL)
- pacaudi, Nassarius pacaudi F. Van Dingenen, L. Ceulemans & al., 2015 † - (NASSARIIDAE) (FOSSIL)
- pacaudi, Simnia pacaudi L. Dolin & Ledon, 2002 - (OVULIDAE)
- pacaudi, Turbonilla pacaudi A. Peñas & E. Rolán, 2010 - (PYRAMIDELLIDAE)
- Pacaudiella, Genus Pacaudiella Harzhauser & Neubauer, 2015 (ANADROMIDAE) (FOSSIL)
- Pacaudina, Genus Pacaudina Vermeulen & al., 2010 (ANAHAMULINIDAE) (FOSSIL)
- paceana, Strombina paceana W.H. Dall, 1916 - syn of: Strombina maculosa (G.B. I Sowerby, 1832) - (COLUMBELLIDAE)
- pacei, Cyclothyca pacei E.J. Petuch, 1987 - (AMATHINIDAE)
- pacei, Amalda pacei (E.J. Petuch, 1987) - (ANCILLARIIDAE)
- pacei, Gemophos pacei E.J. Petuch & D.M. Sargent, 2011 - (BUCCINIDAE)
- pacei, Columbella pacei J.C. Melvill & R. Standen, 1896 - syn of: Anarithma stepheni (J.C. Melvill & R. Standen, 1897) - (COLUMBELLIDAE)
- pacei, Conasprella pacei (E.J. Petuch, 1987) - (CONIDAE)
- pacei, Dalliconus pacei E.J. Petuch, 1987 - syn of: Conasprella pacei (E.J. Petuch, 1987) - (CONIDAE)
- pacei, Atys pacei H.B. Preston, 1908 - (HAMINOEIDAE)
- pacei, Anarithma pacei J.C. Melvill & R. Standen, 1896 - syn of: Anarithma stepheni (J.C. Melvill & R. Standen, 1897) - (MITROMORPHIDAE)
- pacei, Modulus pacei E.J. Petuch, 1987 - (MODULIDAE)
- pacei, Dermomurex pacei E.J. Petuch, 1988 - (MURICIDAE)
- pacei, Favartia pacei E.J. Petuch, 1988 - (MURICIDAE)
- pacei, Agatha pacei (P. Dautzenberg & H. Fischer, 1906) - (PYRAMIDELLIDAE)
- pacei, Pontiothauma pacei E.A. Smith, 1906 - (RAPHITOMIDAE)
- pacei, Terebra pacei E.J. Petuch, 1987 - syn of: Terebra vinosa W.H. Dall, 1889 - (TEREBRIDAE)
- pacei, Pusula pacei (E.J. Petuch, 1987) - (TRIVIIDAE)
- pacha, Odostomia pacha P. Bartsch, 1926 - (PYRAMIDELLIDAE)
- pachecensis, Mesembrinus translucens pachecensis H.A. Pilsbry, 1930 - (BULIMULIDAE)
- Pachecoa, Genus Pachecoa Harris, 1919 (NOETIIDAE) (FOSSIL)
- pachecoi, Triptychia pachecoi (Thomás Doménech, 1954 †) - (FILHOLIIDAE) (FOSSIL)
- pachecoi, Melanopsis pachecoi Royo Gómez, 1922 † - (MELANOPSIDAE) (FOSSIL)
- pacheia, Tomura pacheia † - (CORNIROSTRIDAE) (FOSSIL)
- Pachendoceras, Genus Pachendoceras Ulrich & Foerste, 1936 (ELLESMEROCERATIDAE) (FOSSIL)
- pachia, Bivetopsia pachia M. Smith, 1940 - syn of: Bivetopsia moorei pachia M. Smith, 1940 - (CANCELLARIIDAE)
- pachia, Bivetopsia moorei pachia M. Smith, 1940 - (CANCELLARIIDAE)
- pachia, Gibberula pachia R.B. Watson, 1886 - syn of: Triginella pachia (R.B. Watson, 1886) - (CYSTISCIDAE)
- pachia, Ceratia pachia (R.B. Watson, 1886) - (IRAVADIIDAE)
- pachia, Triginella pachia (R.B. Watson, 1886) - (MARGINELLIDAE)
- pachia, Xanthodaphne pachia (R.B. Watson, 1881) - (RAPHITOMIDAE)
- pachia, Portlandia pachia (A.E. Verrill & K.J. Bush, 1898) - (YOLDIIDAE)
- pachia, Yoldiella pachia A.E. Verrill & K.J. Bush, 1898 - syn of: Portlandia pachia (A.E. Verrill & K.J. Bush, 1898) - (YOLDIIDAE)
- pachii, Agapilia pachii (M. Hörnes, 1848 †) - (NERITIDAE) (FOSSIL)
- pachiniana, Apricardia pachiniana Sirna 1983 † - (REQUIENIIDAE) (FOSSIL)
- pachispira, Littoridina pachispira W.A. Biese, 1944 - (COCHLIOPIDAE)
- pachista, Marginella pachista J.R. le B. Tomlin, 1913 - (MARGINELLIDAE)
- Pachnodes, syn of: Genus Pachnodus J.A. Albers in E.C. Von Martens, 1860 (CERASTUIDAE)
- pachnodes, Abchasohela pachnodes (O. Böttger, 1884) - (HYGROMIIDAE)
- Pachnodus, Genus Pachnodus J.A. Albers in E.C. Von Martens, 1860 (CERASTUIDAE)
- pachosteus, Plethobasus pachosteus J.P.E. Morrison, 1969 - syn of: Plethobasus cicatricosus (T. Say, 1829) - (UNIONIDAE)
- pachti, Sphenoceramus pachti Archanguelsky, 1916 † - (INOCERAMIDAE) (FOSSIL)
- Pachtoceras, Genus Pachtoceras Foerste, 1926 (ONCOCERIDA (UNASSIGNED)) (FOSSIL)
- pachu, Hammatoceras pachu Buckman, 1921 † - (HAMMATOCERATIDAE) (FOSSIL)
- pachu, Pseudogrammoceras pachu Buckman, 1902 † - (HILDOCERATIDAE) (FOSSIL)
- pachundaki, Edentiella edentula pachundaki (J.P.R. Draparnaud, 1805) - (HYGROMIIDAE)
- pachya, Euhadra pachya H.A. Pilsbry, 1902 - (BRADYBAENIDAE)
- Pachya, Genus Pachya Albers, 1850 (CAMAENIDAE)
- pachya, Gregorioiscala pachya (É.A.A. Locard, 1897) - (EPITONIIDAE)
- pachya, Sabinella pachya (P. Dautzenberg & H. Fischer, 1896) - (EULIMIDAE)
- pachya, Helix pachya (J.R. Bourguignat, 1860) - (HELICIDAE)
- pachya, Melanopsis pachya P.M. Pallary, 1939 - (MELANOPSIDAE)
- pachya, Tudorella sulcata pachya (P.M. Pallary, 1936) - (POMATIIDAE)
- pachya, Amuropaludina pachya (J.R. Bourguignat, 1860) - (VIVIPARIDAE)
- pachya gombaulti, Melanopsis pachya gombaulti P.M. Pallary, 1939 - (MELANOPSIDAE)
- Pachyanodon, syn of: Genus Anodontites J.G. Bruguiθre, 1792 (MYCETOPODIDAE)
- Pachybathron, Genus Pachybathron J.S. Gaskoin, 1853 (CYSTISCIDAE)
- Pachybelemnopsis, Genus Pachybelemnopsis Riegraf, 1980 (MESOHIBOLITHIDAE) (FOSSIL)
- Pachycardia, Genus Pachycardia Guo, 1985 (HYRIIDAE) (FOSSIL)
- PACHYCARDIIDAE Cox, 1961 - Family (BIVALVIA-PALAEOHETERODONTA [Subclass]-UNIONIDA [Order]) (FOSSIL)
- Pachycardioceras, Genus Pachycardioceras Buckman, 1926 (CARDIOCERATIDAE) (FOSSIL)
- Pachycardium, Genus Pachycardium Conrad, 1869 (CARDIIDAE) (FOSSIL)
- Pachycarocollina, syn of: Genus Canariella P. Hesse, 1918 (CANARIELLIDAE)
- Pachyceras, Genus Pachyceras Bayle, 1878 (PACHYCERATIDAE) (FOSSIL)
- PACHYCERATIDAE Buckman, 1918 - Family (CEPHALOPODA-AMMONOIDEA [Subclass]-AMMONITIDA [Order]-STEPHANOCERATOIDEA [Superfamily]) (FOSSIL)
- pachycercus, Comitas pachycercus A.V. Sysoev & P. Bouchet, 2001 - (PSEUDOMELATOMIDAE)
- pachycheila, Achatina pachycheila W.H. Benson, 1853 - syn of: Glessula pachycheila (W.H. Benson, 1853) - (ACHATINIDAE)
- pachycheila, Drillia pachycheila J. Gardner, 1937 † - (DRILLIIDAE) (FOSSIL)
- pachycheila, Austroharpa pachycheila (R. Tate, 1894 †) - (HARPIDAE) (FOSSIL)
- pachycheila, Glessula pachycheila (W.H. Benson, 1853) - (SUBULINIDAE)
- pachycheila taprobanica, Glessula pachycheila taprobanica H.A. Pilsbry, 1908 - (SUBULINIDAE)
- pachycheilus, Amphidromus metabletus pachycheilus O.F. von Möllendorff, 1901 - (CAMAENIDAE)
- pachycheilus alba, Amphidromus metabletus pachycheilus alba O.F. von Möllendorff, 1901 - (CAMAENIDAE)
- pachycheylos, Ranularia pachycheylos C.M. Tapparone-Canefri, 1876 - syn of: Ranularia monilifera (A. Adams & L.A. Reeve, 1850) - (RANELLIDAE)
- pachychila, Bradybaena eris pachychila O.F. von Möllendorff, 1899 - (BRADYBAENIDAE)
- pachychila, Camaena pachychila (E.A. Smith, 1893) - (CAMAENIDAE)
- pachychila, Nannodiella pachychila (E.A. Smith, 1888) - (CLATHURELLIDAE)
- pachychila, Delima latilabris pachychila (C.A. Westerlund, 1878) - (CLAUSILIIDAE)
- pachychila, Eulima pachychila O. Böttger, 1893 - (EULIMIDAE)
- pachychila, Helix pachychila E.A. Smith, 1893 - syn of: Camaena pachychila (E.A. Smith, 1893) - (HELICIDAE)
- pachychila, Bania pachychila (Š. Brusina, 1902 †) - (HYDROBIIDAE) (FOSSIL)
- pachychila, Pleurotoma pachychila E.A. Smith, 1888 - syn of: Stosicia abnormis (G. Nevill & H. Nevill, 1875) - (TURRIDAE)
- pachychiles, Trochus pachychiles C. Linnaeus, 1758 - (TROCHIDAE)
- PACHYCHILIDAE P. Fischer & Crosse, 1892 - Family (GASTROPODA-CAENOGASTROPODA [Subclass]-CERITHIOIDEA [Superfamily])
- pachychilina, Sericata stussineri pachychilina H. Nordsieck, 1972 - (CLAUSILIIDAE)
- pachychillus, Lamprocystis hahajimana pachychillus H.A. Pilsbry & Y. Hirase, 1905 - (EUCONULIDAE)
- pachychilus, Boucardicus pachychilus K.C. Emberton, 1994 - (CYCLOPHORIDAE)
- pachychilus, Diplommatina pachychilus W.H. Benson, 1857 - (DIPLOMMATINIDAE)
- pachychilus, Carychium pachychilus Sandberger, 1872 † - (ELLOBIIDAE) (FOSSIL)
- pachychilus, Nassarius pachychilus (H. von Maltzan, 1884) - (NASSARIIDAE)
- Pachychilus, Genus Pachychilus I. Lea, 1850 (PACHYCHILIDAE)
- pachychilus, Gyraulus pachychilus (Š. Brusina, 1902) - (PLANORBIDAE)
- pachychilus, Haploptychius pachychilus (O.F. von Möllendorff, 1884) - (STREPTAXIDAE)
- pachychilus, Strobilops pachychilus Soós in Bartha & Soós, 1955 † - (STROBILOPSIDAE) (FOSSIL)
- pachychilus, Chiliborus pachychilus (L. Pfeiffer, 1842) - (STROPHOCHEILIDAE)
- Pachyclymenia, Genus Pachyclymenia Schindewolf, 1937 (PACHYCLYMENIIDAE) (FOSSIL)
- PACHYCLYMENIIDAE Korn, 1992 - Family (CEPHALOPODA-AMMONOIDEA [Subclass]-CLYMENIIDA [Order]-BILOCLYMENIOIDEA [Superfamily]) (FOSSIL)
- pachycostata, Duyeina pachycostata Busnardo, 2003 † - (ANAHAMULINIDAE) (FOSSIL)
- pachycostata, Ecphora pachycostata E.J. Petuch, 1988 † - (MURICIDAE) (FOSSIL)
- pachycostatus, Jeanrogericeras pachycostatus Summesberger, 1992 † - (ACANTHOCERATIDAE) (FOSSIL)
- pachycostatus, Taimyrosphinctes pachycostatus Mesezhnikov, 1984 † - (DORSOPLANITIDAE) (FOSSIL)
- Pachycrommium, Subgenus Amaurellina (Pachycrommium) W.P. Woodring, 1928 (AMPULLINIDAE) (FOSSIL)
- pachycyclus, Paraspiticeras pachycyclus (Uhlig, 1883 †) - (EMERICICERATIDAE) (FOSSIL)
- Pachycymbiola, Subgenus Adelomelon (Pachycymbiola) H.F.A. von Ihering, 1907 (VOLUTIDAE)
- Pachycythara, Genus Pachycythara Woodring , 1928 (TURRIDAE) (FOSSIL)
- pachyderma, Neritina pachyderma C.L.F. von Sandberger, 1875 † - (NERITIDAE) (FOSSIL)
- pachyderma, Onchidella pachyderma (H.P. Plate, 1893) - (ONCHIDIIDAE)
- Pachydermia, Genus Pachydermia A. Warιn & P. Bouchet, 1989 (PELTOSPIRIDAE)
- Pachydesma, syn of: Genus Tivela J.H.F. Link, 1807 (VENERIDAE)
- Pachydesmoceras, Genus Pachydesmoceras Spath , 1922 (DESMOCERATIDAE) (FOSSIL)
- pachydicranus, Teschenites pachydicranus Thieuloy, 1977 † - (NEOCOMITIDAE) (FOSSIL)
- PACHYDISCIDAE Spath, 1922 - Family (CEPHALOPODA-AMMONOIDEA [Subclass]-AMMONITIDA [Order]-DESMOCERATOIDEA [Superfamily]) (FOSSIL)
- Pachydiscoceras, Genus Pachydiscoceras Zhao & Liang, 1966 (PSEUDOTIROLITIDAE) (FOSSIL)
- pachydiscoide, Pachydesmoceras pachydiscoide E. Matsumoto, 1954 † - (DESMOCERATIDAE) (FOSSIL)
- Pachydiscoides, Genus Pachydiscoides Spath, 1922 (PACHYDISCIDAE) (FOSSIL)
- pachydiscum, Neotainoceras pachydiscum J.K. Zhao & al., 1978 † - (TAINOCERATIDAE) (FOSSIL)
- Pachydiscus, Genus Pachydiscus Anderson, 1958 (DESMOCERATIDAE) (FOSSIL)
- pachydiscus, Finiclymenia pachydiscus (Bogoslovsky, 1981 †) - (GONIOCLYMENIIDAE) (FOSSIL)
- pachydiscus, Kalloclymenia pachydiscus Bogoslovsky, 1981 † - syn of: Finiclymenia pachydiscus (Bogoslovsky, 1981 †) - (GONIOCLYMENIIDAE) (FOSSIL)
- pachydiscus, Iranoceras pachydiscus Walliser, 1966 † - (SPORADOCERATIDAE) (FOSSIL)
- PACHYDOMIDAE P. Fischer, 1887 - Family (BIVALVIA-HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-HIATELLIDA [Order]-EDMONDIOIDEA [Superfamily) (FOSSIL)
- Pachydomus, syn of: Genus Megadesmus Sowerby , 1838 (MEGADESMIDAE) (FOSSIL)
- Pachydon, Genus Pachydon Gabb, 1869 (CORBULIDAE) (FOSSIL)
- pachydonta, Ennucula pachydonta (B. Prashad, 1932) - (NUCULIDAE)
- Pachydontella, Genus Pachydontella Marwick, 1948 (TROCHIDAE) (FOSSIL)
- Pachydrobia, Genus Pachydrobia J.C.H. Crosse & P. Fischer, 1876 (POMATIOPSIDAE)
- Pachydrobiella, Genus Pachydrobiella K.H.J. Thiele, 1918 (POMATIOPSIDAE)
- Pachydupotetia, syn of: Subgenus Otala (Dupotetia) W. Kobelt, 1904 (HELICIDAE)
- Pachyduvalia, Genus Pachyduvalia Riegraf, 1981 (BELEMNITIDA (UNASSIGNED)) (FOSSIL)
- Pachyerymnoceras, Genus Pachyerymnoceras (PACHYCERATIDAE) (FOSSIL)
- pachygaster, Cymbularia pachygaster E.F.R.K. Koken & J. Perner, 1925 † - syn of: Cymbularia bullata E.F.R.K. Koken & J. Perner, 1925 † - (BELLEROPHONTIDAE) (FOSSIL)
- pachygaster, Granaria pachygaster A. Moquin-Tandon, 1856 - syn of: Granaria variabilis (J.P.R. Draparnaud, 1801) - (CHONDRINIDAE)
- pachygaster, Solatopupa pachygaster F.L. Giusti, 1970 - syn of: Solatopupa guidoni (E. Caziot, 1904) - (CHONDRINIDAE)
- pachygaster, Omphaloptycha pachygaster E.A.L. Kittl, 1894 † - (COELOSTYLINIDAE) (FOSSIL)
- pachygaster, Cyrtolites pachygaster E.F.R.K. Koken & J. Perner, 1925 † - syn of: Cymbularia bullata E.F.R.K. Koken & J. Perner, 1925 † - (CYRTOLITIDAE) (FOSSIL)
- pachygaster, Limnaea pachygaster Thomä, 1845 - syn of: Radix subovata pachygaster (Thomä, 1845 †) - (LYMNAEIDAE)
- pachygaster, Radix subovata pachygaster (Thomä, 1845 †) - (LYMNAEIDAE) (FOSSIL)
- pachygaster boettgeri, Lymnaea pachygaster boettgeri Degrange-Touzin, 1891 - syn of: Radix subovata pachygaster (Thomä, 1845 †) - (LYMNAEIDAE)
- pachygaster tournoueri, Limnaea pachygaster tournoueri Degrange-Touzin, 1892 - syn of: Radix subovata pachygaster (Thomä, 1845 †) - (LYMNAEIDAE)
- pachygastra, Hydrobia pachygastra A. Paladilhe, 1869 - (HYDROBIIDAE)
- pachygastra, Pleurodonte pachygastra (J.E. Gray, 1834) - (PLEURODONTIDAE)
- pachygastris, Steatonenia pachygastris E. Neubert & H. Nordsieck, 2005 - (CLAUSILIIDAE)
- pachygastris, Delima laevissima pachygastris (E.A. Rossmässler, 1835) - (CLAUSILIIDAE)
- pachygastris, Cucullaea pachygastris Boettger, 1880 † - (CUCULLAEIDAE) (FOSSIL)
- pachyglottis, Oophana pachyglottis (O.F. von Möllendorff, 1900) - (STREPTAXIDAE)
- pachygyra, Elma pachygyra (P.V. Gredler, 1885) - (STREPTAXIDAE)
- pachygyra, Stenogyra pachygyra P.V. Gredler, 1885 - syn of: Elma pachygyra (P.V. Gredler, 1885) - (SUBULINIDAE)
- pachygyrum, Prototoceras pachygyrum J.K. Zhao & al., 1978 † - (ARAXOCERATIDAE) (FOSSIL)
- Pachyhemihoplites, Genus Pachyhemihoplites Delanoy, 1992 (HEMIHOPLITIDAE) (FOSSIL)
- Pachykellya, Genus Pachykellya F. Bernard, 1897 (NEOLEPTONIDAE)
- Pachylabra, syn of: Genus Pila P.F. Rφding, 1798 (AMPULLARIIDAE)
- pachylasma, Petaloconchus pachylasma (O.A.L. Mörch, 1862) - (VERMETIDAE)
- pachylasmae, Callistochiton pachylasmae (T.A. de M. Monterosato, 1879 ex G. Seguenza MS) - (CALLISTOPLACIDAE)
- pachylasmae, Chiton pachylasmae T.A. de M. Monterosato, 1879 ex G. Seguenza MS - syn of: Callistochiton pachylasmae (T.A. de M. Monterosato, 1879 ex G. Seguenza MS) - (CHITONIDAE)
- pachyloma, Praticolella pachyloma (K.T. Menke, 1847) - (POLYGYRIDAE)
- Pachylyroceras, Genus Pachylyroceras Ruzhentsev & Bogoslovskaya, 1971 (NEOGLYPHIOCERATIDAE) (FOSSIL)
- Pachylytoceras, syn of: Genus Pleurolytoceras Hyatt in Eastman-Zittel, 1900 (LYTOCERATIDAE) (FOSSIL)
- Pachymegalodon, Genus Pachymegalodon Gόmbel, 1862 (PACHYRISMATIDAE) (FOSSIL)
- Pachymegalodus, syn of: Genus Pachymegalodon Gόmbel, 1862 (PACHYRISMATIDAE) (FOSSIL)
- Pachymelania, Genus Pachymelania E.A. Smith, 1893 (THIARIDAE)
- PACHYMELANIIDAE - syn of Family: THIARIDAE
- Pachymelon, Genus Pachymelon Marwick, 1926 (VOLUTIDAE) (FOSSIL)
- Pachymenia, Genus Pachymenia H. Heath, 1911 (AMPHIMENIIDAE)
- pachymeres, Gigantites pachymeres Buchman S † - (MOLLUSCA INCERTAE SEDIS) (FOSSIL)
- pachymorpha, Ampullina pachymorpha A.E.M. Cossmann & Pisarro, 1900 † - (AMPULLINIDAE) (FOSSIL)
- Pachymya, Genus Pachymya Sowerby, 1826 (PHOLADOMYIDAE) (FOSSIL)
- Pachymyonia, Subgenus Myonia (Pachymyonia) Dun, 1932 (VACUNELLIDAE) (FOSSIL)
- Pachymytilus, Genus Pachymytilus Zittel, 1881 (PTERIIDA (UNASSIGNED)) (FOSSIL)
- Pachynaias, Genus Pachynaias J.C.H. Crosse & P. Fischer, 1894 (UNIONIDAE)
- pachynepion, Lodderena pachynepion (H.A. Pilsbry & A.A. Olsson, 1945) - (SKENEIDAE)
- pachynepion, Cyclostremiscus pachynepion H.A. Pilsbry & A.A. Olsson, 1945 - (TORNIDAE)
- pachynotus, Aphaostracon pachynotus F.G. Thompson, 1968 - (COCHLIOPIDAE)
- pachyodon, Pythia pachyodon H.A. Pilsbry & Y. Hirase, 1908 - (ELLOBIIDAE)
- Pachyodon, syn of: Genus Paxyodon Schumacher, 1817 (HYRIIDAE)
- pachyodon, Elliptio pachyodon H.A. Pilsbry, 1953 - syn of: Elliptio crassidens J.B.P.A. Lamarck, 1819 - (UNIONIDAE)
- pachyodon aegiatilis, Pythia pachyodon aegiatilis H.A. Pilsbry & Y. Hirase, 1908 - (ELLOBIIDAE)
- Pachyoliva, Subgenus Olivella (Pachyoliva) A.A. Olsson, 1956 (OLIVELLIDAE) (FOSSIL)
- Pachyomphalus, Genus Pachyomphalus Bφhm , 1895 (TRICOLNATICOPSIDAE) (FOSSIL)
- pachyope, Natica pachyope A.E.M. Cossmann & M.A. Peyrot, 1921 † - (NATICIDAE) (FOSSIL)
- Pachyopis, Genus Pachyopis Bigot, 1895 (CARDIIDA (UNASSIGNED)) (FOSSIL)
- pachyostraca, Atrina pachyostraca (S.M. Davies, 1923) - (PINNIDAE)
- Pachyotus, syn of: Genus Auris J.B. von Spix, 1827 (BULIMULIDAE)
- pachyozodes, Dolicholatirus pachyozodes A.E.M. Cossmann, 1897 † - (FASCIOLARIIDAE) (FOSSIL)
- Pachyperna, Genus Pachyperna Oppenheim, 1900 (PTERIIDA (UNASSIGNED)) (FOSSIL)
- Pachyphaedusa, syn of: Genus Disjunctaria O. Boettger, 1877 (CLAUSILIIDAE) (FOSSIL)
- Pachyphallus, syn of: Genus Helix C. Linnaeus, 1758 (HELICIDAE)
- pachyphylla, Bassina pachyphylla (I.H. Jonas, 1839) - (VENERIDAE)
- pachyphylla, Venus pachyphylla I.H. Jonas, 1839 - syn of: Bassina pachyphylla (I.H. Jonas, 1839) - (VENERIDAE)
- Pachypictonia, Genus Pachypictonia Schneid, 1940 (PERISPHINCTIDAE) (FOSSIL)
- pachypleura, Teratobaicalia duthiersii pachypleura (W.A. Lindholm, 1924) - (AMNICOLIDAE)
- pachypleura, Dentalium pachypleura M. Boissevain, 1906 - syn of: Gadilina pachypleura (M. Boissevain, 1906) - (DENTALIIDAE)
- pachypleura, Sthenorytis pachypleura (T.A. Conrad, 1841 †) - (EPITONIIDAE) (FOSSIL)
- pachypleura, Gadilina pachypleura (M. Boissevain, 1906) - (GADILINIDAE)
- pachypleura, Entomonotis pachypleura (Teller, 1886 †) - (MONOTIDAE) (FOSSIL)
- pachypleura, Parkinsonia pachypleura Buckman, 1925 † - (PARKINSONIIDAE) (FOSSIL)
- pachypleura, Turbonilla pachypleura J.C. Melvill, 1910 - (PYRAMIDELLIDAE)
- Pachypoma, Subgenus Lithopoma (Pachypoma) J.E. Gray, 1850 (TURBINIDAE)
- Pachyproptychites, Genus Pachyproptychites Diener , 1916 (PROPTYCHITIDAE) (FOSSIL)
- Pachypteria, Genus Pachypteria Koninck, 1885 (PTERIIDA (UNASSIGNED)) (FOSSIL)
- pachyptycha, Acteocina pachyptycha A.E.M. Cossmann, 1897 † - (ACTEOCINIDAE) (FOSSIL)
- pachyptychina, Clausilia pachyptychina P. Ehrmann, 1929 - (CLAUSILIIDAE)
- pachyraphe, Fusus pachyraphe E.A. Smith, 1879 - syn of: Bedevina birileffi (C.E. Lischke, 1871) - (FASCIOLARIIDAE)
- pachyraphe, Orania pachyraphe (E.A. Smith, 1879) - (MURICIDAE)
- Pachyretinella, Genus Pachyretinella H. Nordsieck, 2014 (OXYCHILIDAE) (FOSSIL)
- Pachyrisma, Genus Pachyrisma Morris & Lycett, 1850 (PACHYRISMATIDAE) (FOSSIL)
- PACHYRISMATIDAE Scarlato & Starobogatov, 1979 - Family (BIVALVIA-HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-MEGALODONTIDA [Order]-MEGALODONTOIDEA [Super) (FOSSIL)
- Pachyrismella, Genus Pachyrismella Cox, 1964 (PACHYRISMATIDAE) (FOSSIL)
- Pachyrissoina, syn of: Genus Rissoina D'Orbigny, 1840 (RISSOINIDAE)
- Pachyrotoceras, Genus Pachyrotoceras Zhao & al., 1978 (ANDERSSONOCERATIDAE) (FOSSIL)
- Pachyrotunda, Genus Pachyrotunda Wesselingh, 2006 (CORBULIDAE) (FOSSIL)
- pachys, Mortoniceras pachys (Seeley, 1865 †) - (BRANCOCERATIDAE) (FOSSIL)
- pachys, Naesiotus pachys (H.A. Pilsbry, 1897) - (BULIMULIDAE)
- pachys, Gunnarites pachys Spath, 1953 † - (KOSSMATICERATIDAE) (FOSSIL)
- pachys, Protoglyptus pachys H.A. Pilsbry, 1897 - syn of: Naesiotus pachys (H.A. Pilsbry, 1897) - (ORTHALICIDAE)
- pachys, Relichna pachys (R.B. Watson, 1883) - (RETUSIDAE)
- pachysiphon, Raphaulus pachysiphon W. Theobald & F. Stoliczka, 1872 - (PUPINIDAE)
- Pachysiphonaria, Subgenus Siphonaria (Pachysiphonaria) B. Hubendick, 1945 (SIPHONARIIDAE)
- pachysoma, Georissa pachysoma J.J. Vermeulen & D.J. Junau, 2007 - (HYDROCENIDAE)
- pachysoma, Radiatula pachysoma (W.H. Benson, 1862) - (UNIONIDAE)
- Pachysphaera, Subgenus Helicostyla (Pachysphaera) H.A. Pilsbry, 1892 (BRADYBAENIDAE)
- Pachysphinctes, Genus Pachysphinctes Dietrich (PERISPHINCTIDAE) (FOSSIL)
- pachyspira, Megalophaedusa pachyspira (H.A. Pilsbry, 1902) - (CLAUSILIIDAE)
- pachyspira, Lamellaxis pachyspira H.A. Pilsbry, 1905 - (SUBULINIDAE)
- pachystephanum, Pseudocrioceras pachystephanum (Uhlig, 1883 †) - (ANCYLOCERATIDAE) (FOSSIL)
- pachystirus, Murex pachystirus R. Tate, 1888 - (MURICIDAE)
- pachystoma, Leptachatina pachystoma W.H. Pease, 1879 - (AMASTRIDAE)
- pachystoma, Ampullaria pachystoma R.A. Philippi, 1849 - syn of: Pomacea glauca (C. Linnaeus, 1758) - (AMPULLARIIDAE)
- Pachystoma, syn of: Genus Pila P.F. Rφding, 1798 (AMPULLARIIDAE)
- Pachystoma, syn of: Genus Polydontes P.D. Montfort, 1810 (CAMAENIDAE)
- pachystoma, Ryssota pachystoma Unknown - (CHRONIDAE)
- pachystoma, Delima pachystoma (L. Pfeiffer, 1848) - (CLAUSILIIDAE)
- pachystoma, Arinia stenotrochus pachystoma J.J. Vermeulen, 1996 - (DIPLOMMATINIDAE)
- pachystoma, Aphanoconia pachystoma (E.A. Smith, 1896) - (HELICINIDAE)
- Pachystoma, syn of: Subgenus Pleuropoma (Aphanoconia) A. Wagner, 1905 (HELICINIDAE)
- pachystoma, Microcolpia pachystoma J.R. Bourguignat, 1884 - syn of: Melanopsis cornea Pfeiffer, 1828 - (MELANOPSIDAE)
- pachystoma, Glossaulax pachystoma (L.H. Hupé, 1854 †) - (NATICIDAE) (FOSSIL)
- Pachystoma, syn of: Genus Eurycratera H.H. Beck, 1837 (PLEURODONTIDAE)
- pachystoma, Callianella pachystoma B. Rensch, 1931 - (PUPINIDAE)
- pachystoma, Rissoina pachystoma J.C. Melvill, 1896 - (RISSOINIDAE)
- pachystoma, Viviparus pachystoma (C.L.F. von Sandberger, 1859 †) - (VIVIPARIDAE) (FOSSIL)
- pachystoma brevis, Leptachatina pachystoma brevis C.M. Cooke, 1910 - (AMASTRIDAE)
- pachystoma cylindrella, Leptachatina pachystoma cylindrella C.M. Cooke, 1910 - (AMASTRIDAE)
- pachystoma decattaniae, Delima pachystoma decattaniae (J. Villa, 1871) - (CLAUSILIIDAE)
- pachystoma dissitus, Viviparus pachystoma dissitus Kókay, 2006 † - (VIVIPARIDAE) (FOSSIL)
- pachystoma dubloni, Ryssota pachystoma dubloni H.B. Baker, 1941 - (CHRONIDAE)
- pachystoma nevestensis, Delima pachystoma nevestensis H. Nordsieck, 1969 - (CLAUSILIIDAE)
- pachystoma satricensis, Delima pachystoma satricensis H. Nordsieck, 1969 - (CLAUSILIIDAE)
- pachystoma sucinacia, Delima pachystoma sucinacia (O. Böttger, 1879) - (CLAUSILIIDAE)
- pachystoma turgidula, Leptachatina pachystoma turgidula W.H. Pease, 1870 - (AMASTRIDAE)
- pachystoma vicariella, Delima pachystoma vicariella H. Nordsieck, 1969 - (CLAUSILIIDAE)
- pachystomus, Arcestes pachystomus Mojsisovics, 1875 † - (ARCESTIDAE) (FOSSIL)
- pachyston, Solariorbis pachyston (J.C. Verco, 1907) - (TORNIDAE)
- pachyston, Circulus pachyston (J.C. Verco, 1907) - syn of: Solariorbis pachyston (J.C. Verco, 1907) - (TORNIDAE)
- Pachystremiscus, Subgenus Cyclostremiscus (Pachystremiscus) A.A. Olsson & J.T.L. McGinty, 1942 (TORNIDAE)
- Pachystrophia, Genus Pachystrophia Perner, 1903 (HOLOPEIDAE) (FOSSIL)
- Pachystyla, Genus Pachystyla O.A.L. Mφrch, 1852 (HELICARIONIDAE)
- pachystylum, Xanthomelon pachystylum (L. Pfeiffer, 1845) - (CAMAENIDAE)
- pachystylum bicanaliculata, Xanthomelon pachystylum bicanaliculata (L. Pfeiffer, 1845) - (CAMAENIDAE)
- pachystylum dalmatinus, Xanthomelon pachystylum dalmatinus (L. Pfeiffer, 1845) - (CAMAENIDAE)
- pachystylum halophilus, Xanthomelon pachystylum halophilus (L. Pfeiffer, 1845) - (CAMAENIDAE)
- pachystylum macrocephala, Xanthomelon pachystylum macrocephala (L. Pfeiffer, 1845) - (CAMAENIDAE)
- pachystylum magnidicum, Xanthomelon pachystylum magnidicum T. Iredale, 1938 - syn of: Xanthomelon magnidicum (T. Iredale, 1938) - (CAMAENIDAE)
- pachystylum melanesica, Xanthomelon pachystylum melanesica (L. Pfeiffer, 1845) - (CAMAENIDAE)
- pachystylum saginatum, Xanthomelon pachystylum saginatum T. Iredale, 1938 - syn of: Xanthomelon saginatum (T. Iredale, 1938) - (CAMAENIDAE)
- Pachysyrnola, Subgenus Syrnola (Pachysyrnola) A.E.M. Cossmann, 1907 (PYRAMIDELLIDAE)
- pachyta, Marstonia pachyta F.G. Thompson, 1977 - (HYDROBIIDAE)
- pachyta, Lymnaea pachyta (C.A. Westerlund, 1885) - (LYMNAEIDAE)
- pachyta, Slehoferia pachyta Ebbestad & al., 2008 † - (TROCHONEMATIDAE) (FOSSIL)
- pachytesta, Chione pachytesta Pronina, 1969 † - (VENERIDAE) (FOSSIL)
- Pachyteuthis, Genus Pachyteuthis Bayle, 1878 (BELEMNITIDA (UNASSIGNED)) (FOSSIL)
- Pachythaerus, Subgenus Crassatella (Pachythaerus) Conrad, 1869 (CRASSATELLIDAE) (FOSSIL)
- Pachytoma, syn of: Genus Helicina J.B.P.A. Lamarck, 1799 (HELICINIDAE)
- Pachytraga, Genus Pachytraga Paquier, 1900 (CAPRINIDAE) (FOSSIL)
- Pachyturris, Genus Pachyturris Olsson , 1964 (TURRIDAE) (FOSSIL)
- pachyus, Busycon pachyus E.J. Petuch, 1994 † - (BUSYCONIDAE) (FOSSIL)
- pachyus, Fusolatirus pachyus M.A. Snyder & P. Bouchet, 2006 - (FASCIOLARIIDAE)
- pachyus, Cymbium pachyus (P.M. Pallary, 1930) - (VOLUTIDAE)
- Pachyvascoceras, syn of: Genus Vascoceras Choffat , 1898 (VASCOCERATIDAE) (FOSSIL)
- pachyzoma, Terebra pachyzoma O.A.L. Mörch, 1861 - syn of: Terebra formosa G.P. Deshayes, 1857 - (TEREBRIDAE)
- paciae, Polinices paciae L. Bozzetti, 1997 - (NATICIDAE)
- pacianus, Lobites pacianus McLearn, 1937 † - (LOBITIDAE) (FOSSIL)
- pacifampla, Lymnaea pacifampla N.D. Kruglov & Y.I. Starobogatov, 1989 - (LYMNAEIDAE)
- pacifera, Venericardia pacifera (M. Yokoyama, 1924 †) - (CARDITIDAE) (FOSSIL)
- pacifica, Eburna pacifica W.J. Swainson, 1822 - syn of: Babylonia lutosa (J.B.P.A. Lamarck, 1816) - (ANCILLARIIDAE)
- pacifica, Ancistrobasis pacifica H.S. Ladd, 1970 † - (ANCISTROBASIDAE) (FOSSIL)
- pacifica, Phyllaplysia pacifica L.S.R. Bergh - (APLYSIIDAE)
- pacifica, Anchura pacifica A.A. Olsson, 1944 † - (APORRHAIDAE) (FOSSIL)
- pacifica, Arca pacifica Sowerby, 1833 - (ARCIDAE)
- pacifica, Bathyarca pacifica S. Nomura, H. Niino & N. Zinbo, 1934 - syn of: Samacar strabo (C. Hedley, 1915) - (ARCIDAE)
- pacifica, Cinysca pacifica (H.S. Ladd, 1966 †) - (ARENEIDAE) (FOSSIL)
- pacifica, Chartronella pacifica (Jaworski, 1923 †) - (ATAPHRIDAE) (FOSSIL)
- pacifica, Atlanta pacifica T. Tokioka, 1955 - (ATLANTIDAE)
- pacifica, Basterotia pacifica A.A. Olsson, 1961 - syn of: Ensitellops hertleini W.K. Emerson & E.L. Puffer, 1957 - (BASTEROTIIDAE)
- pacifica, Rhinocoryne pacifica (G.B. Sowerby, 1843) - (BATILLARIIDAE)
- pacifica, Belomitra pacifica (W.H. Dall, 1908) - (BELOMITRIDAE)
- pacifica, Bathytoma pacifica R.L. Squires, 2001 † - (BORSONIIDAE) (FOSSIL)
- pacifica, Cadlina pacifica L.S.R. Bergh, 1879 - (CADLINIDAE)
- pacifica, Euclia pacifica H.A. Pilsbry & A.A. Olsson, 1941 † - (CANCELLARIIDAE) (FOSSIL)
- pacifica, Canterburyella pacifica K. Bandel, Gruendel & P.A. Maxwell, 2000 † - (CANTERBURYELLIDAE) (FOSSIL)
- pacifica, Torellia pacifica T.A. Okutani, 1980 - (CAPULIDAE)
- pacifica, Trichotropis pacifica W.H. Dall, 1908 - syn of: Provanna pacifica (W.H. Dall, 1908) - (CAPULIDAE)
- pacifica, Venericor pacifica (A.A. Olsson, 1928 †) - (CARDITIDAE) (FOSSIL)
- pacifica, Oocorys pacifica W.H. Dall, 1896 - syn of: Oocorys verrillii (W.H. Dall, 1889) - (CASSIDAE)
- pacifica, Diacavolinia pacifica S. Van Der Spoel, P. Bleeker & H. Kobayasi, 1993 - (CAVOLINIIDAE)
- pacifica, Chama pacifica W.J. Broderip, 1835 - (CHAMIDAE)
- pacifica, Lucilina pacifica (E.H.J. Leloup, 1981) - (CHITONIDAE)
- pacifica, Oospira pacifica H. Nordsieck, 2016 - (CLAUSILIIDAE)
- pacifica, Formosana pacifica (P.V. Gredler, 1884) - (CLAUSILIIDAE)
- pacifica, Cocculina pacifica J.T. Kuroda & T. Habe, 1949 - (COCCULINIDAE)
- pacifica, Columbella pacifica J.S. Gaskoin, 1851 - syn of: Euplica varians (G.B. I Sowerby, 1832) - (COLUMBELLIDAE)
- pacifica, Corambe pacifica F.M. MacFarland & O'Donoghue, 1929 - (CORAMBIDAE)
- pacifica, Galiteuthis pacifica (G.C. Robson, 1948) - (CRANCHIIDAE)
- pacifica, Leachia pacifica (A. Issel, 1908) - (CRANCHIIDAE)
- pacifica, Crassinella pacifica (C.B. Adams, 1852) - (CRASSATELLIDAE)
- pacifica, Cuvierina pacifica A.W. Janssen, 2005 - (CUVIERINIDAE)
- pacifica, Erosaria pacifica J.M. Ostergaard, 1920 - syn of: Naria ostergaardi (W.H. Dall, 1921) - (CYPRAEIDAE)
- pacifica, Lyncina pacifica W.R. Steadman & B.C. Cotton, 1943 - syn of: Lyncina lynx (C. Linnaeus, 1758) - (CYPRAEIDAE)
- pacifica, Gibberula pacifica (W.H. Pease, 1868) - (CYSTISCIDAE)
- pacifica, Diaphana pacifica T. Schiøtte, 1998 - (DIAPHANIDAE)
- pacifica, Doto pacifica K. Baba, 1949 - (DOTIDAE)
- pacifica, Leuconopsis pacifica W.R.B. Oliver, 1915 - (ELLOBIIDAE)
- pacifica, Costentalina pacifica S.D. Chistikov, 1982 - (ENTALINIDAE)
- pacifica, Euciroa pacifica W.H. Dall, 1895 - (EUCIROIDAE)
- pacifica, Pyramidelloides pacifica C.F. Laseron, 1956 - syn of: Pyramidelloides mirandus (A. Adams, 1861) - (EULIMIDAE)
- pacifica, Peristernia pacifica R.P. Lesson, 1842 - syn of: Peristernia chlorostoma (G.B. I Sowerby, 1825) - (FASCIOLARIIDAE)
- pacifica, Cornisepta pacifica (E. Cowan, 1969) - (FISSURELLIDAE)
- pacifica, Ancula pacifica F.M. MacFarland, 1964 - (GONIODORIDIDAE)
- pacifica, Phygraea pacifica R.L. Squires & Demetrion, 1990 † - (GRYPHAEIDAE) (FOSSIL)
- pacifica, Orobophana pacifica (W.H. Pease, 1865) - (HELICINIDAE)
- pacifica, Saxicavella pacifica W.H. Dall, 1916 - (HIATELLIDAE)
- pacifica, Histioteuthis celetaria pacifica (N.A. Voss, 1962) - (HISTIOTEUTHIDAE)
- pacifica, Icanotia pacifica A.A. Olsson, 1944 † - (ICANOTIIDAE) (FOSSIL)
- pacifica, Kelliella pacifica E.A. Smith, 1885 - syn of: Vesicomya pacifica (E.A. Smith, 1885) - (KELLIELLIDAE)
- pacifica, Lepeta caeca pacifica L.I. Moskalev, 1977 - (LEPETIDAE)
- pacifica, Limacina helicina pacifica W.H. Dall, 1871 - (LIMACINIDAE)
- pacifica, Limaria pacifica (A.V.M.D. D'Orbigny, 1846) - (LIMIDAE)
- pacifica, Pillucina pacifica E.A. Glover & D.W. Taylor, 2001 - (LUCINIDAE)
- pacifica, Phacoides pacifica A.A. Olsson, 1964 † - (LUCINIDAE) (FOSSIL)
- pacifica, Lyonsiella pacifica W.H. Dall, 1908 - (LYONSIELLIDAE)
- pacifica, Harvella pacifica T.A. Conrad, 1867 - syn of: Harvella elegans (Sowerby, 1825) - (MACTRIDAE)
- pacifica, Harvella pacifica T.A. Conrad, 1867 - syn of: Harvella elegans (Sowerby, 1825) - (MACTRIDAE)
- pacifica, Magnapinna pacifica M. Vecchione & A.T. Young, 1998 - (MAGNAPINNIDAE)
- pacifica, Malletia pacifica W.H. Dall, 1897 - (MALLETIIDAE)
- pacifica, Marginella pacifica W.H. Pease, 1867 - syn of: Gibberula pacifica (W.H. Pease, 1868) - (MARGINELLIDAE)
- pacifica, Otapiria pacifica Covacevich & Escobar, 1979 † - (MONOTIDAE) (FOSSIL)
- pacifica, Litigiella pacifica C.F. Lützen & S. Kosuge, 2006 - (MONTACUTIDAE)
- pacifica, Placiphorella pacifica S.S. Berry, 1919 - (MOPALIIDAE)
- pacifica, Cyrtostropha pacifica J. Perner, 1907 † - (MURCHISONIIDAE) (FOSSIL)
- pacifica, Orania pacifica (T. Nakayama, 1988) - (MURICIDAE)
- pacifica, Adipicola pacifica (W.H. Dall, P. Bartsch & H.A. Rehder, 1938) - (MYTILIDAE)
- pacifica, Idas pacifica W.H. Dall, P. Bartsch & H.A. Rehder, 1938 - syn of: Adipicola pacifica (W.H. Dall, P. Bartsch & H.A. Rehder, 1938) - (MYTILIDAE)
- pacifica, Nerita pacifica C.A. Récluz, 1850 - syn of: Nerita insculpta C.A. Récluz, 1841 - (NERITIDAE)
- pacifica, Pisulinella pacifica Kano & Kase, 2000 † - (NERITILIIDAE) (FOSSIL)
- pacifica, Graneledone pacifica N.A. Voss & W.G. Pearcy, 1990 - syn of: Graneledone boreopacifica K.N. Nesis, 1982 - (OCTOPODIDAE)
- pacifica, Oliva pacifica F.P. Marrat, 1870 - (OLIVIDAE)
- pacifica, Adalaria pacifica L.S.R. Bergh, 1880 - (ONCHIDORIDIDAE)
- pacifica, Moroteuthis pacifica T.A. Okutani, 1983 - syn of: Onykia robusta (A.E. Verrill, 1876) - (ONYCHOTEUTHIDAE)
- pacifica, Grimpoteuthis pacifica (W.E. Hoyle, 1885) - (OPISTHOTEUTHIDAE)
- pacifica, Chartroniella pacifica Jaworski, 1923 † - syn of: Chartronella pacifica (Jaworski, 1923 †) - (PARATURBINIDAE) (FOSSIL)
- pacifica, Parilimya pacifica (W.H. Dall, 1907) - (PARILIMYIDAE)
- pacifica, Pedicularia pacifica W.H. Pease, 1865 - (PEDICULARIIDAE)
- pacifica, Cochlodesma pacifica (T.A. Okutani, 1962) - (PERIPLOMATIDAE)
- pacifica, Cosa pacifica (K.H.J. Thiele & S.G.A. Jaeckel, 1931) - (PHILOBRYIDAE)
- pacifica, Pholas pacifica R.E.C. Stearns, 1871 - syn of: Barnea subtruncata (G.B. I Sowerby, 1834) - (PHOLADIDAE)
- pacifica, Barnea pacifica R.E.C. Stearns, 1871 - syn of: Barnea subtruncata (G.B. I Sowerby, 1834) - (PHOLADIDAE)
- pacifica, Pholadomya pacifica W.H. Dall, 1907 - syn of: Parilimya pacifica (W.H. Dall, 1907) - (PHOLADOMYIDAE)
- pacifica, Chiapaphysa pacifica D.W. Taylor, 2003 - (PHYSIDAE)
- pacifica, Pneumoderma pacifica W.H. Dall, 1871 - syn of: Pneumoderma pacificum W.H. Dall, 1871 - (PNEUMODERMATIDAE)
- pacifica, Thecacera pacifica (L.S.R. Bergh, 1884) - (POLYCERIDAE)
- pacifica, Colga pacifica (L.S.R. Bergh, 1894) - (POLYCERIDAE)
- pacifica, Cedrosia pacifica L.R. Saul & R.L. Squires, 2003 † - (POTAMIDIDAE) (FOSSIL)
- pacifica, Provanna pacifica (W.H. Dall, 1908) - (PROVANNIDAE)
- pacifica, Psammobia pacifica T.A. Conrad, 1837 - syn of: Heterodonax pacificus (T.A. Conrad, 1837) - (PSAMMOBIIDAE)
- pacifica, Leucosyrinx pacifica W.H. Dall, 1908 - syn of: Belomitra pacifica (W.H. Dall, 1908) - (PSEUDOMELATOMIDAE)
- pacifica, Vulsella pacifica W.H. Dall, 1916 - syn of: Vulsella vulsella (C. Linnaeus, 1758) - (PTERIIDAE)
- pacifica, Fusitriton pacifica W.H. Dall, 1909 - syn of: Fusitriton oregonensis (J.H. Redfield, 1846) - (RANELLIDAE)
- pacifica, Priene pacifica W.H. Dall, 1909 - syn of: Fusitriton oregonensis (J.H. Redfield, 1846) - (RANELLIDAE)
- pacifica, Famelica pacifica A.V. Sysoev & Y.I. Kantor, 1987 - (RAPHITOMIDAE)
- pacifica, Driomenia pacifica H. Heath, 1911 - (RHOPALOMENIIDAE)
- pacifica, Ringicula pacifica J. Makiyama, 1927 - (RINGICULIDAE)
- pacifica, Rissoella colleenae pacifica W.F. Ponder & E.K. Yoo, 1977 - (RISSOELLIDAE)
- pacifica, Platyoptera pacifica R.L. Squires & Demetrion, 1990 † - (ROSTELLARIIDAE) (FOSSIL)
- pacifica, Roxania pacifica (T. Habe, 1955) - (SCAPHANDRIDAE)
- pacifica, Sinezona pacifica (W.R.B. Oliver, 1915) - (SCISSURELLIDAE)
- pacifica, Sinezona pacifica K. Bandel, 1998 - syn of: Sinezona pacifica (W.R.B. Oliver, 1915) - (SCISSURELLIDAE)
- pacifica, Cumingia pacifica (W.H. Dall, 1915) - (SEMELIDAE)
- pacifica, Semele pacifica W.H. Dall, 1915 - syn of: Semele verrucosa O.A.L. Mörch, 1860 - (SEMELIDAE)
- pacifica, Sepioloidea pacifica (T.W. Kirk, 1882) - (SEPIADARIIDAE)
- pacifica, Rossia pacifica S.S. Berry, 1911 - (SEPIOLIDAE)
- pacifica, Coanyax pacifica (W.H. Dall, 1900) - (TELLINIDAE)
- pacifica, Melibe pacifica K. Baba, 1949 - (TETHYDIDAE)
- pacifica, Graphis pacifica K. Bandel, 2005 - (TOFANELLIDAE)
- pacifica, Niveria pacifica (G.B. II Sowerby, 1832) - (TRIVIIDAE)
- pacifica, Truncatella pacifica W.H. Pease, 1858 - syn of: Truncatella guerinii A. Villa & J. Villa, 1841 - (TRUNCATELLIDAE)
- pacifica, Pachypoma inaequale pacifica W.H. Dall, 1919 - (TURBINIDAE)
- pacifica, Zemysina pacifica Zinsmeister, 1983 † - (UNGULINIDAE) (FOSSIL)
- pacifica, Sinanodonta woodiana pacifica (P.M. Heude) - (UNIONIDAE)
- pacifica, Retroteuthis pacifica L.M.A.O.E. Joubin, 1929 - syn of: Vampyroteuthis infernalis C. Chun, 1903 - (VAMPYROTEUTHIDAE)
- pacifica, Fossarella pacifica K.H.J. Thiele, 1925 - (VANIKORIDAE)
- pacifica, Marseniopsis pacifica L.S.R. Bergh, 1886 - (VELUTINIDAE)
- pacifica, Gouldia pacifica C.B. Adams, 1852 - syn of: Crassinella pacifica (C.B. Adams, 1852) - (VENERIDAE)
- pacifica, Callocardia pacifica E.A. Smith, 1885 - syn of: Vesicomya pacifica (E.A. Smith, 1885) - (VENERIDAE)
- pacifica, Venus pacifica L.W. Dillwyn, 1817 - syn of: Callista chinensis (H.S. Holten, 1802) - (VENERIDAE)
- pacifica, Venus pacifica P.F. Röding, 1798 - syn of: Circomphalus foliaceolamellosus (L.W. Dillwyn, 1817) - (VENERIDAE)
- pacifica, Trigonulina pacifica P.O. Jung, 1996 - syn of: Trigonulina novemcostata (A. Adams & L.A. Reeve, 1850) - (VERTICORDIIDAE)
- pacifica, Calyptogena pacifica W.H. Dall, 1891 - (VESICOMYIDAE)
- pacifica, Vesicomya pacifica (E.A. Smith, 1885) - (VESICOMYIDAE)
- pacifica, Alcithoe pacifica G. Perry, 1810 - syn of: Alcithoe arabica (J.F. Gmelin, 1791) - (VOLUTIDAE)
- pacifica, Xylophaga pacifica J.R. Voight, 2009 - (XYLOPHAGAIDAE)
- pacifica convexa, Chama pacifica convexa S. Clessin, 1889 - syn of: Chama pacifica W.J. Broderip, 1835 - (CHAMIDAE)
- pacifica diegensis, Rossia pacifica diegensis S.S. Berry, 1912 - (SEPIOLIDAE)
- pacifica galapagensis, Limaria pacifica galapagensis H.A. Pilsbry & E.G. Vanatta, 1902 - (LIMIDAE)
- pacifica jukesii, Chama pacifica jukesii L.A. Reeve, 1846 - (CHAMIDAE)
- pacifica mexicana, Crassinella pacifica mexicana H.A. Pilsbry & H.N. Lowe, 1932 - (CRASSATELLIDAE)
- pacifica reflexa, Chama pacifica reflexa L.A. Reeve, 1846 - (CHAMIDAE)
- pacifica siantanensis, Formosana pacifica siantanensis T.C. Yen, 1939 - (CLAUSILIIDAE)
- pacificans, Semisulcospira pacificans (P.M. Heude, 1888) - (SEMISULCOSPIRIDAE)
- Pacificaprina, Genus Pacificaprina Chartrousse & Masse (CAPRINIDAE) (FOSSIL)
- Pacificella, syn of: Genus Tornatellinops H.A. Pilsbry & C.M. Cooke, 1915 (ACHATINELLIDAE)
- Pacificeras, syn of: Genus Tiltoniceras Buckman , 1913 (HILDOCERATIDAE) (FOSSIL)
- pacificiensis, Sphenia pacificiensis L. de Folin in L. de Folin & J.P.L. Périer, 1867 - syn of: Sphenia fragilis (H. Adams & A. Adams, 1854) - (MYIDAE)
- Pacificor, Subgenus Venericardia (Pacificor) Verastegui, 1953 (CARDITIDAE) (FOSSIL)
- Pacificoryphella, Genus Pacificoryphella A.V. Martynov, 1999 (FLABELLINIDAE) (FOSSIL)
- pacificum, Crenilabium pacificum J.T. Kuroda & T. Habe, 1958 - (ACTEONIDAE)
- pacificum, Bathypelta pacificum (W.H. Dall, 1908) - (BATHYSCIADIIDAE)
- pacificum, Benthodolium pacificum W.H. Dall, 1896 - syn of: Oocorys verrillii (W.H. Dall, 1889) - (CASSIDAE)
- pacificum, Cerithium pacificum R.S. Houbrick, 1992 - (CERITHIIDAE)
- pacificum, Cerithium pacificum G.B. I Sowerby, 1834 - syn of: Rhinocoryne humboldtii (A. Valenciennes, 1832) - (CERITHIIDAE)
- pacificum, Chaetoderma pacificum (G. Schwabl, 1963) - (CHAETODERMATIDAE)
- pacificum, Vexillum pacificum (L.A. Reeve, 1845) - (COSTELLARIIDAE)
- pacificum, Cymatoceras pacificum E. Matsumoto & Muramoto, 1983 † - (CYMATOCERATIDAE) (FOSSIL)
- pacificum, Gastrioceras pacificum A. Thomas, 1928 † - syn of: Pseudoparalegoceras peruvianum (S.S. Berry, 1928 †) - (GASTRIOCERATIDAE) (FOSSIL)
- pacificum, Gastropteron pacificum L.S.R. Bergh, 1894 - (GASTROPTERIDAE)
- pacificum, Dacrydium pacificum W.H. Dall, 1916 - (MYTILIDAE)
- pacificum, Gyrodes pacificum W.P. Popenoe, 1987 † - (NATICIDAE) (FOSSIL)
- pacificum, Sinum pacificum Rivera, 1957 † - (NATICIDAE) (FOSSIL)
- pacificum, Pneumoderma pacificum W.H. Dall, 1871 - (PNEUMODERMATIDAE)
- pacificum, Worthoceras pacificum E. Matsumoto & Yokoi, 1987 † - (SCAPHITIDAE) (FOSSIL)
- pacificum, Chlorostoma pacificum (F.M. Anderson & B. Martin, 1914 †) - (TEGULIDAE) (FOSSIL)
- pacificum cinereum, Gastropteron pacificum cinereum W.H. Dall, 1925 - syn of: Gastropteron pacificum L.S.R. Bergh, 1894 - (GASTROPTERIDAE)
- pacificum pharaonis, Vexillum pacificum pharaonis A. Issel, 1869 - syn of: Vexillum cadaverosum pharaonis (A. Issel, 1869) - (COSTELLARIIDAE)
- pacificum wisemani, Vexillum pacificum wisemani (W.L.H. Dohrn, 1860) - (COSTELLARIIDAE)
- pacificus, Haliphron pacificus I. Ijima in I. Ijima & S. Ikeda, 1902 - syn of: Haliphron atlanticus J.J.S. Steenstrup, 1861 - (ALLOPOSIDAE)
- pacificus, Proarcestes pacificus A. Hyatt & Smith, 1905 † - (ARCESTIDAE) (FOSSIL)
- pacificus, Trochacanthus pacificus R.L. Squires & Saul, 2001 † - (ARCHAEOGASTROPODA (UNASSIGNED)) (FOSSIL)
- pacificus, Argonauta pacificus W.H. Dall, 1871 - (ARGONAUTIDAE)
- pacificus, Guexites pacificus Bucher, 1992 † - (BEYRICHITIDAE) (FOSSIL)
- pacificus, Falsilatirus pacificus W.K. Emerson & R.B. Moffitt, 1988 - (BUCCINIDAE)
- pacificus, Cosmonautilus pacificus Smith, 1927 † - (CLYDONAUTILIDAE) (FOSSIL)
- pacificus, Clydonites pacificus Tozer, 1994 † - (CLYDONITIDAE) (FOSSIL)
- pacificus, Profundiconus pacificus (R.G. Moolenbeek & D. Röckel, 1996) - (CONIDAE)
- pacificus, Profundiconus pacificus R.G. Moolenbeek & D. Röckel, 1996 - syn of: Profundiconus pacificus (R.G. Moolenbeek & D. Röckel, 1996) - (CONIDAE)
- pacificus, Pyrgopsis pacificus A. Issel, 1908 - syn of: Leachia pacifica (A. Issel, 1908) - (CRANCHIIDAE)
- pacificus, Desmopterus pacificus C.E.A. Essenberg, 1919 - (DESMOPTERIDAE)
- pacificus, Abraliopsis pacificus S. Tsuchiya & T.A. Okutani, 1991 - (ENOPLOTEUTHIDAE)
- pacificus, Favorinus pacificus K. Baba, 1937 - (FACELINIDAE)
- pacificus, Clavilithes pacificus Woods in Bosworth, 1922 † - (FASCIOLARIIDAE) (FOSSIL)
- pacificus, Amiantofusus pacificus K. Fraussen, Y.I. Kantor & R. Hadorn, 2007 - (FASCIOLARIIDAE)
- pacificus, Glaucus pacificus J.F. von Eschscholtz, 1831 - syn of: Glaucus atlanticus F. Forster, 1777 - (GLAUCIDAE)
- pacificus, Pseudokossmaticeras pacificus (F. Stoliczka, 1865 †) - (KOSSMATICERATIDAE) (FOSSIL)
- pacificus, Ectocentrites pacificus Longridge & al., 2008 † - (LYTOCERATIDAE) (FOSSIL)
- pacificus, Anasibirites pacificus (Yehara, 1927 †) - (MELAGATHICERATIDAE) (FOSSIL)
- pacificus, Boreotrophon pacificus (W.H. Dall, 1902) - (MURICIDAE)
- pacificus, Modiolatus pacificus (A.A. Olsson, 1961) - (MYTILIDAE)
- pacificus, Todarodes pacificus (J.J.S. Steenstrup, 1880) - (OMMASTREPHIDAE)
- pacificus, Anguipecten pacificus H.H. Dijkstra, 2002 - (PECTINIDAE)
- pacificus, Heteroplocamus pacificus (L.S.R. Bergh, 1884) - (POLYCERIDAE)
- pacificus, Heterodonax pacificus (T.A. Conrad, 1837) - (PSAMMOBIIDAE)
- pacificus, Pupoides pacificus (L. Pfeiffer, 1846) - (PUPILLIDAE)
- pacificus, Pyrgiscus pacificus M. Yokoyama, 1922 - (PYRAMIDELLIDAE)
- pacificus, Keyserlingites pacificus (A. Hyatt & Smith, 1905 †) - (SIBIRITIDAE) (FOSSIL)
- pacificus, Solecurtus pacificus R.T. Abbott & S.P. Dance, 1986 - syn of: Solecurtus rhombus (L. Spengler, 1794) - (SOLECURTIDAE)
- pacificus, Spondylus pacificus T. Iredale, 1939 - syn of: Spondylus anacanthus pacificus (T. Iredale, 1939) - (SPONDYLIDAE)
- pacificus, Spondylus anacanthus pacificus (T. Iredale, 1939) - (SPONDYLIDAE)
- pacificus, Steinmannites pacificus Tozer, 1994 † - (STEINMANNITIDAE) (FOSSIL)
- pacificus, Euprotomus pacificus W.J. Swainson, 1821 - syn of: Euprotomus vomer (P.F. Röding, 1798) - (STROMBIDAE)
- pacificus, Tirolites pacificus A. Hyatt & Smith, 1905 † - syn of: Keyserlingites pacificus (A. Hyatt & Smith, 1905 †) - (TIROLITIDAE) (FOSSIL)
- pacificus, Solariorbis pacificus H.A. Pilsbry & A.A. Olsson, 1952 - (TORNIDAE)
- pacificus, Pamphagosirenites pacificus Tozer, 1994 † - (TRACHYCERATIDAE) (FOSSIL)
- pacificus, Tropiceltites pacificus Tozer, 1994 † - (TROPICELTITIDAE) (FOSSIL)
- pacificus, Jovites pacificus Smith, 1927 † - (TROPITIDAE) (FOSSIL)
- pacificus fortior, Spondylus pacificus fortior T. Iredale, 1939 - syn of: Spondylus anacanthus pacificus fortior T. Iredale, 1939 - (SPONDYLIDAE)
- pacificus fortior, Spondylus anacanthus pacificus fortior T. Iredale, 1939 - (SPONDYLIDAE)
- pacificus pusillus, Todarodes pacificus pusillus Dunning, 1988 - (OMMASTREPHIDAE)
- Pacifimyxas, Genus Pacifimyxas N.D. Kruglov & Y.I. Starobogatov, 1985 (LYMNAEIDAE)
- pacilus, Anomia pacilus J.E. Gray, 1850 - syn of: Anomia peruviana A.V.M.D. D'Orbigny, 1846 - (ANOMIIDAE)
- Pacimonotis, Subgenus Monotis (Pacimonotis) Grant-Mackie & Silberling, 1990 (MONOTIDAE) (FOSSIL)
- paciniana, Murella scabriuscula paciniana (R.A. Philippi, 1836) - (HELICIDAE)
- paciniana, Mangelia paciniana (P. Calcara, 1839) - (MANGELIIDAE)
- paciniana, Mangelia paciniana É.A.A. Locard & E. Caziot, 1900 - syn of: Mangelia paciniana (P. Calcara, 1839) - (MANGELIIDAE)
- paciniana, Pleurotoma paciniana P. Calcara, 1839 - syn of: Mangelia paciniana (P. Calcara, 1839) - (TURRIDAE)
- Pacipecten, syn of: Genus Leptopecten A.E. Verrill, 1897 (PECTINIDAE)
- pacis, Epitonium pacis W.H. Dall, 1917 - syn of: Epitonium multicostatum (G.B. II Sowerby, 1844) - (EPITONIIDAE)
- pacis, Macrarene pacis (W.H. Dall, 1908) - (LIOTIIDAE)
- pacis, Nassa pacis H.A. Pilsbry & A.A. Olsson, 1941 † - (MURICIDAE) (FOSSIL)
- pacis, Macoma pacis H.A. Pilsbry & Lowe, 1932 - syn of: Psammotreta viridotincta (Carpenter, 1856) - (TELLINIDAE)
- Pacitrigonia, Genus Pacitrigonia Marwick, 1932 (TRIGONIIDAE) (FOSSIL)
- packamoni, Bursa packamoni H.R. Matthews & A.C. dos Santos Coelho, 1971 - syn of: Bursa grayana R.W. Dunker, 1862 - (BURSIDAE)
- packardana, Calyptogena packardana P.J. Barry, R.E. Kochevar, R. Baxter & Harrold, 1997 - (VESICOMYIDAE)
- Packardella, Genus Packardella Kobayashi & Amano, 1955 (STEINMANELLIDAE) (FOSSIL)
- packardi, Wellsia packardi (Anderson, 1938 †) - (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- packardi, Ampullina packardi W.P. Popenoe, 1937 † - (AMPULLINIDAE) (FOSSIL)
- packardi, Pseudocardium packardi R.E. Dickerson, 1917 † - (MACTRIDAE) (FOSSIL)
- packardi, Myophorella packardi Crickmay, 1930 † - (MYOPHORELLIDAE) (FOSSIL)
- packardi, Saccella packardi (E. Forbes, 1848 †) - (NUCULANIDAE) (FOSSIL)
- packardi, Saccella packardi R.E. Dickerson † - syn of: Saccella packardi (E. Forbes, 1848 †) - (NUCULANIDAE) (FOSSIL)
- packardi, Truncacila packardi Devjatilova, 1981 † - (NUCULIDAE) (FOSSIL)
- packardi, Trigonia packardi Anderson, 1958 † - syn of: Apiotrigonia condoni (A. Packard, 1921 †) - (TRIGONIIDAE) (FOSSIL)
- packardii, Pleurotomella packardii A.E. Verrill, 1872 - (RAPHITOMIDAE)
- packardii benedicti, Pleurotomella packardii benedicti A.E. Verrill & S. Smith, 1884 - syn of: Pleurotomella benedicti A.E. Verrill & S. Smith, 1884 - (RAPHITOMIDAE)
- packhaensis, Aegista packhaensis (A.R.J.B. Bavay & P. Dautzenberg, 1908) - (BRADYBAENIDAE)
- packhaensis, Helix packhaensis A.R.J.B. Bavay & P. Dautzenberg, 1908 - syn of: Aegista packhaensis (A.R.J.B. Bavay & P. Dautzenberg, 1908) - (HELICIDAE)
- packi, Miltha packi R.E. Dickerson, 1916 † - (LUCINIDAE) (FOSSIL)
- pacodelucia, Facelinopsis pacodelucia J.A. Ortea, L. Moro & G.M. Caballer, 2014 - (FACELINIDAE)
- pacoi, Opalia pacoi W. Engl, 2002 - (EPITONIIDAE)
- pacoi, Runcina pacoi J.A. Ortea, J.J. Bacallado & G.M. Caballer, 2014 - (RUNCINIDAE)
- pacomei, Potomida pacomei J.R. Bourguignat in É.A.A. Locard, 1889 - syn of: Potomida littoralis (G.L.C.F.D. Cuvier, 1798) - (UNIONIDAE)
- pacorubioi, Haplocochlias pacorubioi F. Rubio, R. Fernández-Garcés & E. Rolán, 2013 - (SKENEIDAE)
- pacotalaverai, Prunum pacotalaverai J. Espinosa, J.A. Ortea & L. Moro, 2014 - (MARGINELLIDAE)
- pacta, Dimeroclymenia pacta (Pajchlowa, 1972 †) - (BILOCLYMENIIDAE) (FOSSIL)
- pactus, Soleniscus pactus Pan & Erwin, 2002 † - (SOLENISCIDAE) (FOSSIL)
- pacus, Rhipidodonta pacus L.R.L. Simone, 2006 - syn of: Rhipidodonta charruana (A.V.M.D. D'Orbigny, 1835) - (HYRIIDAE)
- Pacyodon, syn of: Genus Erodona F.M. Daudin in L.A.G. d'A. Bosc, 1801 (ERODONIDAE)
- Padagrosites, Genus Padagrosites (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- padana, Bythinella padana R. Bernasconi, 1989 - syn of: Bythinella schmidti (H.C. Küster, 1852) - (BYTHINELLIDAE)
- padana, Anodonta padana H. Drouët, 1883 - syn of: Anodonta cygnea (C. Linnaeus, 1758) - (UNIONIDAE)
- padana, Vertigo padana C. Pollonera, 1885 - syn of: Vertigo antivertigo J.P.R. Draparnaud, 1801 - (VERTIGINIDAE)
- padangense, Epitonium padangense (K.H.J. Thiele, 1925) - (EPITONIIDAE)
- padangensis, Leucotina padangensis K.H.J. Thiele, 1925 - (AMATHINIDAE)
- padangensis, Paraclathurella padangensis (K.H.J. Thiele, 1925) - (CLATHURELLIDAE)
- padangensis, Zafra padangensis (K.H.J. Thiele, 1925) - (COLUMBELLIDAE)
- padangensis, Allorisma padangensis (F.A. Roemer, 1880 †) - (EDMONDIIDAE) (FOSSIL)
- padangensis, Eulima padangensis (K.H.J. Thiele, 1925) - (EULIMIDAE)
- padangensis, Haminoea padangensis K.H.J. Thiele, 1925 - (HAMINOEIDAE)
- padangensis, Iravadia padangensis (K.H.J. Thiele, 1925) - (IRAVADIIDAE)
- padangensis, Pseudonoba padangensis (K.H.J. Thiele, 1925) - syn of: Iravadia padangensis (K.H.J. Thiele, 1925) - (IRAVADIIDAE)
- padangensis, Mangelia padangensis K.H.J. Thiele, 1925 - syn of: Paraclathurella padangensis (K.H.J. Thiele, 1925) - (MANGELIIDAE)
- padangensis, Scabricola padangensis (K.H.J. Thiele, 1925) - (MITRIDAE)
- padangensis, Murchisonia padangensis Fliegel, 1901 † - (MURCHISONIIDAE) (FOSSIL)
- padangensis, Salassia padangensis (K.H.J. Thiele, 1925) - (PYRAMIDELLIDAE)
- padangensis, Sanguinolites padangensis F.A. Roemer, 1880 † - syn of: Allorisma padangensis (F.A. Roemer, 1880 †) - (SANGUINOLITIDAE) (FOSSIL)
- padangensis, Scissurella padangensis K.H.J. Thiele, 1912 - syn of: Sinezona ferriezi (J.C.H. Crosse, 1867) - (SCISSURELLIDAE)
- padangensis, Sinezona padangensis K.H.J. Thiele, 1912 - syn of: Sinezona ferriezi (J.C.H. Crosse, 1867) - (SCISSURELLIDAE)
- padangensis, Euterebra padangensis (K.H.J. Thiele, 1925) - (TEREBRIDAE)
- padangensis, Terebra padangensis K.H.J. Thiele, 1925 - syn of: Euterebra padangensis (K.H.J. Thiele, 1925) - (TEREBRIDAE)
- padangensis, Anticlimax padangensis (K.H.J. Thiele, 1925) - (TORNIDAE)
- padangensis, Discopsis padangensis K.H.J. Thiele, 1925 - syn of: Anticlimax padangensis (K.H.J. Thiele, 1925) - (TORNIDAE)
- padangensis, Gemmula padangensis K.H.J. Thiele, 1925 - syn of: Gemmula hombroni C. Hedley, 1922 - (TURRIDAE)
- Padangia, Subgenus Atopos (Padangia) J.F. Babor, 1900 (RATHOUISIIDAE)
- padanum, Chilostoma padanum (G. Stabile, 1864) - (HELICIDAE)
- padbergense, Dimeroceras padbergense (Wedekind, 1908 †) - (DIMEROCERATIDAE) (FOSSIL)
- padda, Palaina padda T. Iredale, 1944 - (DIPLOMMATINIDAE)
- paddeui, Ocinebrina paddeui G. Bonomolo & G. Buzzurro, 2006 - (MURICIDAE)
- padinae, Phyllaplysia padinae J.D. Williams & T.M. Gosliner, 1973 - (APLYSIIDAE)
- padiraci, Bythinella padiraci É.A.A. Locard, 1903 - (BYTHINELLIDAE)
- padolina, Granoturris padolina W.G. Fargo, 1953 - (MANGELIIDAE)
- Padollus, syn of: Genus Haliotis C. Linnaeus, 1758 (HALIOTIDAE)
- Padollus, syn of: Genus Haliotis C. Linnaeus, 1758 (HALIOTIDAE)
- padonosta, Columbella padonosta P.L. Duclos, 1840 - syn of: Pardalinops testudinaria (J.H.F. Link, 1807) - (COLUMBELLIDAE)
- padonosta, Nitidella padonosta P.L. Duclos, 1835 - syn of: Pardalinops testudinaria (J.H.F. Link, 1807) - (COLUMBELLIDAE)
- Padragosiceras, Genus Padragosiceras (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- padreserrai, Pusula padreserrai C.N. Cate, 1979 - (TRIVIIDAE)
- Padunoceras, Genus Padunoceras Balashov, 1960 (PADUNOCERATIDAE) (FOSSIL)
- PADUNOCERATIDAE Balashov, 1960 - Family (CEPHALOPODA-NAUTILOIDEA [Subclass]-INTEJOCERIDA [Order]) (FOSSIL)
- paeckelmanni, Archoceras paeckelmanni Schindewolf, 1938 † - (GEPHUROCERATIDAE) (FOSSIL)
- paeckelmanni, Murchisonia paeckelmanni Heidelberger & Koch, 2005 † - (MURCHISONIIDAE) (FOSSIL)
- Paedhoplita, Genus Paedhoplita W.A. Lindholm, 1927 (HYGROMIIDAE)
- paedice, Orthonema paedice Erwin, 1988 † - (ORTHONEMATIDAE) (FOSSIL)
- Paedoclione, Genus Paedoclione C.H. Danforth, 1907 (CLIONIDAE)
- paedomorphicus, Cryptotexanites paedomorphicus J. Kennedy & Cobban, 1993 † - (COLLIGNONICERATIDAE) (FOSSIL)
- Paedophoropus, Genus Paedophoropus A. Ivanov, 1933 (EULIMIDAE)
- Paedophorus, syn of: Genus Paedophoropus A. Ivanov, 1933 (EULIMIDAE)
- Paedopronorites, Genus Paedopronorites Glenister & al., 2004 (PRONORITIDAE) (FOSSIL)
- paedopsis, Turritella paedopsis E.A.L. Kittl, 1892 † - (TURRITELLIDAE) (FOSSIL)
- paenacutus, Progoniatites paenacutus D. Korn & al., 2010 † - (GONIATITIDAE) (FOSSIL)
- paenecircularis, Procorniculina paenecircularis Alberti, 1985 † - (PROCORNICULINIDAE) (FOSSIL)
- paenegloba, Gregoia paenegloba D. Fehse, 2015 - (TRIVIIDAE)
- paenesymmetrica, Sthenodonta paenesymmetrica Jakobsen & al., 2016 † - (NUCULARCIDAE) (FOSSIL)
- Paeniscutalus, Subgenus Thaumastus (Paeniscutalus) C.B. Wurtz, 1947 (MEGASPIRIDAE)
- paenites, Mastonia paenites F.P. Jousseaume, 1884 - syn of: Mastonia peanites (F.P. Jousseaume, 1898) - (TRIPHORIDAE)
- paenoblita, Strombina paenoblita P.O. Jung, 1989 - (COLUMBELLIDAE)
- paenula, Phosinella paenula (C.F. Laseron, 1956) - (RISSOINIDAE)
- paenula, Phintorene paenula C.F. Laseron, 1956 - syn of: Phosinella paenula (C.F. Laseron, 1956) - (RISSOINIDAE)
- paeroa, Alocospira paeroa (C.A. Fleming, 1943 †) - (ANCILLARIIDAE) (FOSSIL)
- paesleri, Bela paesleri H. Strebel, 1905 - (MANGELIIDAE)
- paessleri, Pareuthria paessleri (H. Strebel, 1905) - (BUCCINIDAE)
- paessleri, Anachis paessleri H. Strebel, 1905 - syn of: Anachis isabellei (A.V.M.D. D'Orbigny, 1839) - (COLUMBELLIDAE)
- paessleri, Diaphana paessleri (H. Strebel, 1905) - (DIAPHANIDAE)
- paessleri, Ischnochiton paessleri K.H.J. Thiele, 1909 - (ISCHNOCHITONIDAE)
- paessleri, Mangelia paessleri (H. Strebel, 1905) - (MANGELIIDAE)
- paessleri, Trophon paessleri H. Strebel, 1904 - syn of: Xymenopsis muriciformis (P.P. King, 1832) - (MURICIDAE)
- paessleri, Utriculus paessleri H. Strebel, 1905 - syn of: Diaphana paessleri (H. Strebel, 1905) - (RETUSIDAE)
- paessleri turrita, Trophon paessleri turrita H. Strebel, 1904 - syn of: Xymenopsis muriciformis (P.P. King, 1832) - (MURICIDAE)
- paestana, Stigmatica paestana (R.A. Philippi, 1836) - (CLAUSILIIDAE)
- Paestana, syn of: Subgenus Siciliaria (Stigmatica) O. Bφttger, 1877 (CLAUSILIIDAE)
- paestana intustructa, Stigmatica paestana intustructa (C.A. Westerlund, 1883) - (CLAUSILIIDAE)
- paestana semisculpta, Stigmatica paestana semisculpta (M. Paulucci, 1878) - (CLAUSILIIDAE)
- paeteli, Bearizia paeteli (O. Böttger, 1883 †) - (ANCILLARIIDAE) (FOSSIL)
- paeteli, Callistocharis paeteli (W. Kobelt, 1890) - (BOTHRIEMBRYONTIDAE)
- paeteli, Drymaeus paeteli J.A. Albers, 1854 - (BULIMULIDAE)
- paeteli, Crassatina paeteli (H. von Maltzan, 1885) - (CRASSATELLIDAE)
- paeteli, Crassatella paeteli H. von Maltzan, 1885 - syn of: Crassatina paeteli (H. von Maltzan, 1885) - (CRASSATELLIDAE)
- paeteli, Fusinus paeteli R.W. Dunker, 1867 - syn of: Fusinus hartvigii (R.J. Shuttleworth, 1856) - (FASCIOLARIIDAE)
- paeteli, Lutraria paeteli C. Mayer, 1889 † - (MACTRIDAE) (FOSSIL)
- paeteli guttata, Crassatella paeteli guttata W. Kobelt, 1886 - syn of: Crassatina paeteli (H. von Maltzan, 1885) - (CRASSATELLIDAE)
- paeteli maltzani, Crassatella paeteli maltzani W. Kobelt, 1886 - syn of: Crassatina paeteli (H. von Maltzan, 1885) - (CRASSATELLIDAE)
- paeteliana, Cyclocardia paeteliana S. Clessin, 1888 - syn of: Cyclocardia spurca (Sowerby, 1833) - (CARDITIDAE)
- paeteliana, Latirus paeteliana H.C. Küster & W. Kobelt, 1874 - syn of: Fusolatirus paetelianus (H.C. Küster & W. Kobelt, 1874) - (FASCIOLARIIDAE)
- paeteliana, Hemicycla paeteliana (L. Pfeiffer, 1859) - (HELICIDAE)
- paeteliana, Plaxiphora paeteliana (K.H.J. Thiele) - (MOPALIIDAE)
- paeteliana, Modiola paeteliana S. Clessin, 1887 - syn of: Brachidontes modiolus (C. Linnaeus, 1767) - (MYTILIDAE)
- paeteliana, Turbinella paeteliana H.C. Küster & W. Kobelt, 1874 - syn of: Fusolatirus paetelianus (H.C. Küster & W. Kobelt, 1874) - (TURBINELLIDAE)
- paeteliana, Vivipara paeteliana G. Servain, 1884 - syn of: Viviparus viviparus (C. Linnaeus, 1758) - (VIVIPARIDAE)
- paetelianus, Fusolatirus paetelianus (H.C. Küster & W. Kobelt, 1874) - (FASCIOLARIIDAE)
- paetelianus, Mytilus paetelianus S. Clessin, 1887 - syn of: Mytilus planulatus J.B.P.A. Lamarck, 1819 - (MYTILIDAE)
- paetelianus, Pleurotoma paetelianus H.C. Küster & W. Kobelt, 1874 - syn of: Fusolatirus paetelianus (H.C. Küster & W. Kobelt, 1874) - (TURRIDAE)
- paetelianus carpentariensis, Latirus paetelianus carpentariensis C. Hedley, 1912 - syn of: Latirus carpentariensis C. Hedley, 1912 - (FASCIOLARIIDAE)
- paetelianus riukiuanus, Fusolatirus paetelianus riukiuanus F.S. MacNeil, 1960 † - (FASCIOLARIIDAE) (FOSSIL)
- paeyi, Farcimen seminudum paeyi C. de la Torre & P. Bartsch, 1942 - (MEGALOMASTOMIDAE)
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