- siogamaensis, Cylichnella siogamaensis S. Nomura, 1939 - (CYLICHNIDAE)
- siogamaensis, Propebela siogamaensis (S. Nomura & N. Zinbo, 1940) - (MANGELIIDAE)
- siogamaensis, Odostomia siogamaensis S. Nomura, 1936 - (PYRAMIDELLIDAE)
- siogamaensis andoi, Odostomia siogamaensis andoi S. Nomura, 1938 - (PYRAMIDELLIDAE)
- Siogamaia, Subgenus Odostomia (Siogamaia) S. Nomura, 1936 (PYRAMIDELLIDAE)
- siogamensis, Cyclocardia siogamensis S. Nomura, 1957 † - (CARDITIDAE) (FOSSIL)
- siogamensis, Megasurcula siogamensis S. Nomura, 1935 - (PSEUDOMELATOMIDAE)
- siogamensis, Turbonilla siogamensis (S. Nomura, 1936) - (PYRAMIDELLIDAE)
- siogamensis, Chemnitzia siogamensis S. Nomura, 1936 - syn of: Turbonilla siogamensis (S. Nomura, 1936) - (PYRAMIDELLIDAE)
- Siogamia, syn of: Subgenus Odostomia (Siogamaia) S. Nomura, 1936 (PYRAMIDELLIDAE)
- Sioliella, Genus Sioliella F. Haas, 1949 (COCHLIOPIDAE)
- siolii, Drymaeus siolii F. Haas, 1952 - (BULIMULIDAE)
- siolii, Littoridina siolii (F. Haas, 1949) - (COCHLIOPIDAE)
- siolii, Helicina siolii F. Haas, 1949 - (HELICINIDAE)
- siolii, Systrophia siolii F. Haas, 1955 - (SCOLODONTIDAE)
- Siona, syn of: Genus Sarnia H. Adams & A. Adams, 1855 (ELLOBIIDAE)
- siongkiati, Melayonchis siongkiati Dayrat & Goulding, 2017 - (ONCHIDIIDAE)
- siotti, Ercolania siotti S. Trinchese, 1872 - syn of: Ercolania viridis (A. da Costa, 1866) - (LIMAPONTIIDAE)
- siouffi, Dreissena siouffi É.A.A. Locard, 1893 - (DREISSENIDAE)
- siparium, Basedowena siparium F. Criscione & F. Köhler, 2016 - (CAMAENIDAE)
- sipas, Bostryx chusgonensis sipas A.S.H. Breure & V. Mogollón Avilla, 2010 - (BULIMULIDAE)
- siphaios, Calliotropis siphaios C. Vilvens, 2007 - (CALLIOTROPIDAE)
- Siphalomphix, syn of: Genus Bulimulus W.E. Leach, 1814 (BULIMULIDAE)
- siphnica, Xerocrassa siphnica (W. Kobelt, 1883) - (HYGROMIIDAE)
- siphnicus, Zonites siphnicus A. Fuchs & F. Käufel, 1936 - (ZONITIDAE)
- Sipho, syn of: Genus Colus P.F. Röding, 1798 (BUCCINIDAE)
- sipho, Phylloptychoceras sipho (E. Forbes, 1846 †) - (DIPLOMOCERATIDAE) (FOSSIL)
- sipho, Ptychoceras sipho E. Forbes, 1846 † - syn of: Phylloptychoceras sipho (E. Forbes, 1846 †) - (PTYCHOCERATIDAE) (FOSSIL)
- sipho, Siphonaria sipho G.B. I Sowerby, 1823 - (SIPHONARIIDAE)
- sipho, Thylacodes sipho (J.B.P.A. Lamarck, 1818) - (VERMETIDAE)
- sipho, Serpulorbis sipho J.B.P.A. Lamarck, 1818 - syn of: Thylacodes sipho (J.B.P.A. Lamarck, 1818) - (VERMETIDAE)
- sipho, Vermetus sipho C. Rousseau in J.C. Chenu, 1844 - syn of: Thylacodes roussaei (L.L. Vaillant, 1871) - (VERMETIDAE)
- siphocentralis, Dolorthoceras siphocentralis (Krotow, 1885 †) - (SPYROCERATIDAE) (FOSSIL)
- Siphocypraea, Genus Siphocypraea A. Heilprin, 1887 (CYPRAEIDAE)
- Siphodentalium, syn of: Genus Siphonodentalium G.O. Sars, 1859 (GADILIDAE)
- Siphoecphora, Genus Siphoecphora E.J. Petuch, 1988 (MURICIDAE)
- siphoexcentrica, Balashovia siphoexcentrica (I. Balashov, 1955 †) - (ONCOCERIDA (UNASSIGNED)) (FOSSIL)
- Siphogonuchites, Genus Siphogonuchites Qian, 1977 † (SIPHOGONUCHITIDAE) (FOSSIL)
- SIPHOGONUCHITIDAE Qian, 1977 † - Family (DIPLACOPHORA-SACHITIDA [Order]-SIPHOGONUCHITOIDEA [Superfamily]) (FOSSIL)
- Siphogrammysia, Genus Siphogrammysia Chernychev, 1950 † (SANGUINOLITIDAE) (FOSSIL)
- siphon, Typhina siphon W.P. Woodring, 1928 † - (MURICIDAE) (FOSSIL)
- Siphonacmaea, syn of: Genus Siphonacmea T. Habe, 1958 (SIPHONARIIDAE)
- Siphonacmea, Genus Siphonacmea T. Habe, 1958 (SIPHONARIIDAE)
- Siphonalia, Genus Siphonalia A. Adams, 1863 (BUCCINIDAE)
- Siphonaliopsis, Genus Siphonaliopsis Le Renard, 1995 † (TURRIDAE) (FOSSIL)
- Siphonaria, Genus Siphonaria G.B. Sowerby, 1823 (SIPHONARIIDAE)
- SIPHONARIIDAE Gray, 1827 - Family (GASTROPODA-HETEROBRANCHIA [Subclass]-SIPHONARIOIDEA [Superfamily])
- siphonasomae, Barrimysia siphonasomae B.S. Morton & P.H. Scott, 1989 - (MONTACUTIDAE)
- siphonata, Bursa siphonata L.A. Reeve, 1844 - syn of: Bursa rosa Perry, 1811 - (BURSIDAE)
- siphonata, Tritonoharpa siphonata (L.A. Reeve, 1844) - (CANCELLARIIDAE)
- siphonata, Colubraria siphonata (L.A. Reeve, 1844) - (COLUBRARIIDAE)
- siphonata, Umbilia siphonata A.C. Chapman, 1922 † - (CYPRAEIDAE) (FOSSIL)
- siphonata, Laternula siphonata L.A. Reeve, 1863 - syn of: Laternula anatina (C. Linnaeus, 1758) - (LATERNULIDAE)
- siphonata, Anatina siphonata L.A. Reeve, 1863 - syn of: Laternula anatina (C. Linnaeus, 1758) - (MACTRIDAE)
- siphonata, Tugonia siphonata L.A. Reeve, 1863 - syn of: Tugonia anatina (J.F. Gmelin, 1791) - (MYIDAE)
- siphonata, Ranella siphonata L.A. Reeve, 1844 - syn of: Bursa rosa Perry, 1811 - (RANELLIDAE)
- siphonata, Ranella siphonata L.A. Reeve, 1844 - syn of: Bursa rosa Perry, 1811 - (RANELLIDAE)
- siphonata, Melania siphonata L.A. Reeve, 1860 - syn of: Paracrostoma huegelii (R.A. Philippi, 1843) - (THIARIDAE)
- siphonatum, Marsupina siphonatum T. Iredale, 1910 - syn of: Marsupina bufo (J.G. Bruguière, 1792) - (BURSIDAE)
- siphonatum, Cerithium siphonatum G.B. I Sowerby, 1865 - syn of: Cerithium columna G.B. I Sowerby, 1834 - (CERITHIIDAE)
- siphonatus, Maturifusus siphonatus A. Nützel & Erwin, 2004 † - (PSEUDOTRITONIIDAE) (FOSSIL)
- siphonatus, Charonia siphonatus L.A. Reeve, 1844 - syn of: Tritonoharpa siphonata (L.A. Reeve, 1844) - (RANELLIDAE)
- Siphonella, syn of: Subgenus Colus (Siphonellona) W.A. Wenz, 1944 (BUCCINIDAE)
- Siphonellona, Subgenus Colus (Siphonellona) W.A. Wenz, 1944 (BUCCINIDAE)
- Siphonentalis, syn of: Genus Siphonodentalium G.O. Sars, 1859 (GADILIDAE)
- siphonifera, Pilsbrytyphis siphonifera (W.H. Dall, 1915 †) - (MURICIDAE) (FOSSIL)
- siphoniferus, Murex siphoniferus R.P. Lesson, 1844 - syn of: Typhisopsis coronatus (W.J. Broderip, 1833) - (MURICIDAE)
- Siphonilda, Genus Siphonilda Nützel & Erwin, 2004 † (MATHILDIDAE) (FOSSIL)
- siphonis, Tomocyclus siphonis P. Bartsch & J.P.E. Morrison, 1942 - syn of: Tomocyclus simulacrum (P.M.A. Morelet, 1849) - (MEGALOMASTOMIDAE)
- Siphonium, syn of: Genus Dendropoma O.A.L. Mörch, 1861 (VERMETIDAE)
- Siphonochelus, Genus Siphonochelus F.P. Jousseaume, 1880 (MURICIDAE)
- Siphonocyclus, Subgenus Cyclotus (Siphonocyclus) O.F. von Möllendorff, 1900 (CYCLOPHORIDAE)
- SIPHONODENTALIIDAE - syn of Family: GADILIDAE
- Siphonodentalis, syn of: Genus Siphonodentalium G.O. Sars, 1859 (GADILIDAE)
- Siphonodentalium, Genus Siphonodentalium G.O. Sars, 1859 (GADILIDAE)
- Siphonodontum, syn of: Genus Siphonodentalium G.O. Sars, 1859 (GADILIDAE)
- Siphonofusus, Genus Siphonofusus J.T. Kuroda & T. Habe, 1952 (BUCCINIDAE)
- siphonoidea, Latisipho siphonoidea (W.H. Dall, 1913) - (BUCCINIDAE)
- siphonoides, Mohnia siphonoides W.H. Dall, 1913 - syn of: Latisipho siphonoidea (W.H. Dall, 1913) - (BUCCINIDAE)
- Siphonolaemus, Subgenus Brachypodella (Siphonolaemus) H.A. Pilsbry, 1903 (UROCOPTIDAE)
- Siphonophaedusa, Subgenus Oospira (Siphonophaedusa) W.A. Lindholm, 1924 (CLAUSILIIDAE)
- Siphonophyla, Genus Siphonophyla Kittl , 1894 † (EULIMIDAE) (FOSSIL)
- Siphonorbis, syn of: Genus Colus P.F. Röding, 1798 (BUCCINIDAE)
- Siphonostoma, syn of: Genus Brachypodella H.H. Beck, 1837 (UROCOPTIDAE)
- siphonostomum, Plectostoma siphonostomum (W.S.S. Van Benthem-Jutting, 1952) - (DIPLOMMATINIDAE)
- Siphonostyla, Subgenus Pupina (Siphonostyla) W. Kobelt, 1897 (PUPINIDAE)
- Siphonota, syn of: Genus Aplysia C. Linnaeus, 1767 (APLYSIIDAE)
- Siphonotus, syn of: Genus Syphonota H. Adams & A. Adams, 1854 (APLYSIIDAE)
- Siphopatella, Subgenus Crepidula (Siphopatella) Lesson, 1830 † (CALYPTRAEIDAE) (FOSSIL)
- Siphopsis, Genus Siphopsis Rafinesque, 1819 † (TURRIDAE) (FOSSIL)
- Siphopteron, Genus Siphopteron Gosliner, 1989 (GASTROPTERIDAE)
- Siphovasum, syn of: Genus Vasum P.F. Röding, 1798 (TURBINELLIDAE)
- Siphovasum, syn of: Genus Vasum P.F. Röding, 1798 (TURBINELLIDAE)
- siphunculare, Androgynoceras siphunculare (C.T. Simpson, 1843 †) - (LIPAROCERATIDAE) (FOSSIL)
- sipmanus, Conus sipmanus F.C. Meuschen, L.W. Dillwyn, 1817 - syn of: Rubroconus coccineus (J.F. Gmelin, 1791) - (CONIDAE)
- Siptionella, Genus Siptionella Berezovsky, 2014 † (PARALLELODONTIDAE) (FOSSIL)
- sipunculatus, Labyrinthus subplanatus sipunculatus (E. Forbes, 1850) - (CAMAENIDAE)
- sipunculicola, Fronsella sipunculicola T. Habe & T. Kanazawa, 1981 - (MONTACUTIDAE)
- sipylensis, Candidula sipylensis J. Germain, 1933 - (HYGROMIIDAE)
- siquijorensis, Chloraea siquijorensis (W.J. Broderip, 1841) - (BRADYBAENIDAE)
- siquijorensis, Geophorus agglutinans siquijorensis P. Bartsch, 1918 - (HELICINIDAE)
- siquijorensis, Cardiolucina siquijorensis D.W. Taylor & E.A. Glover, 1997 - (LUCINIDAE)
- siquijorensis, Tritia siquijorensis (A. Adams, 1852 †) - (NASSARIIDAE) (FOSSIL)
- siquijorensis, Nassarius siquijorensis A. Adams, 1852 † - syn of: Tritia siquijorensis (A. Adams, 1852 †) - (NASSARIIDAE) (FOSSIL)
- siquijorensis, Neripteron siquijorensis (C.A. Récluz, 1843) - (NERITIDAE)
- siquijorensis, Siphonaria siquijorensis L.A. Reeve, 1856 - (SIPHONARIIDAE)
- siquijorensis hirasei, Nassarius siquijorensis hirasei J.T. Kuroda & T. Habe, 1952 - syn of: Nassarius hirasei J.T. Kuroda & T. Habe, 1952 - (NASSARIIDAE)
- siquijorensis marinuensis, Nassa siquijorensis marinuensis E.J. Koperberg, 1931 † - syn of: Tritia siquijorensis (A. Adams, 1852 †) - (NASSARIIDAE) (FOSSIL)
- siquijorensis timorensis, Nassa siquijorensis timorensis E.J. Koperberg, 1931 † - syn of: Tritia siquijorensis (A. Adams, 1852 †) - (NASSARIIDAE) (FOSSIL)
- Sira, syn of: Genus Rumina A. Risso, 1826 (SUBULINIDAE)
- sirahensis, Modiolus sirahensis F.P. Jousseaume, 1891 - syn of: Jolya rhomboidea sirahensis (F.P. Jousseaume, 1891) - (MYTILIDAE)
- sirahensis, Jolya rhomboidea sirahensis (F.P. Jousseaume, 1891) - (MYTILIDAE)
- Siraius, syn of: Genus Doris C. Linnaeus, 1758 (DORIDIDAE)
- siraphora, Hyalinia siraphora C.A. Westerlund, 1897 - syn of: Eopolita derbentinus (O. Böttger, 1886) - (ZONITIDAE)
- Siraphoroides, Genus Siraphoroides Schileyko, 1977 (ENIDAE)
- Siraphorus, Subgenus Pseudonapaeus (Siraphorus) W.A. Lindholm, 1925 (ENIDAE)
- Siraphorus, syn of: Genus Pseudonapaeus C.A. Westerlund, 1887 (ENIDAE)
- sirat, Murex sirat D'Orbigny, 1841 - syn of: Siratus senegalensis (J.F. Gmelin, 1791) - (MURICIDAE)
- siratama, Propeamussium siratama (K. Oyama in J.T. Kuroda, 1951) - (PROPEAMUSSIIDAE)
- Siratoria, Genus Siratoria Otuka, 1937 † (VENERIDA (UNASSIGNED)) (FOSSIL)
- siratoriensis, Siratoria siratoriensis (Y. Otuka, 1934 †) - (VENERIDA (UNASSIGNED)) (FOSSIL)
- siratschoicus, Rossiites siratschoicus (Lyashenko, 1980 †) - (ROSSIITIDAE) (FOSSIL)
- Siratus, Subgenus Chicoreus (Siratus) F.P. Jousseaume, 1880 (MURICIDAE)
- sirbui, Bythinella sirbui P. Glöer, 2013 - (BYTHINELLIDAE)
- sirderae, Cosmioconcha sirderae J. Pelorce, 2017 - (COLUMBELLIDAE)
- sireli, Globularia sireli Okan & Hosgor, 2008 † - (AMPULLINIDAE) (FOSSIL)
- siren, Lienardia siren E.A. Smith, 1904 - (CLATHURELLIDAE)
- sirena, Chloraea sirena (L. Pfeiffer, 1842) - (BRADYBAENIDAE)
- sirena, Corbicula sirena (A. Brongniart †) - (CYRENIDAE) (FOSSIL)
- sirena, Lioglyphostoma sirena W.H. Dall, 1919 - syn of: Lioglyphostoma ericea (R.B. Hinds, 1843) - (PSEUDOMELATOMIDAE)
- sirena, Turbonilla sirena P. Bartsch, 1927 - (PYRAMIDELLIDAE)
- sirenideditus, Fusinus sirenideditus C.J. Maury, 1912 † - (FASCIOLARIIDAE) (FOSSIL)
- Sirenites, Genus Sirenites McLearn, 1947 † (TRACHYCERATIDAE) (FOSSIL)
- sirenitoides, Parahauerites sirenitoides Krystyn, 1982 † - (KLAMATHITIDAE) (FOSSIL)
- sirenkoi, Paraliotipoma sirenkoi J.H. McLean, 2012 - (COLLONIIDAE)
- sirenkoi, Lepidozona sirenkoi P. Kaas & R.A. Van Belle, 1990 - (ISCHNOCHITONIDAE)
- sirenkoi, Ischnochiton sirenkoi B. Dell'Angelo, G. Prelle, M. Sosso & A. Bonfitto, 2011 - (ISCHNOCHITONIDAE)
- sirenkoi, Kelliella sirenkoi E.N. Egorova, 1998 - (KELLIELLIDAE)
- sirenkoi, Deshayesiella sirenkoi H. Saito, K. Fujikura & E. Tsuchida, 2008 - (LEPTOCHITONIDAE)
- sirenkoi, Parvithracia sirenkoi G.M. Kamenev, 2002 - (THRACIIDAE)
- sirenkoi, Vesicomya sirenkoi (E.N. Egorova, 1998) - (VESICOMYIDAE)
- Sirenotibetites, Genus Sirenotibetites Tozer , 1994 † (TIBETITIDAE) (FOSSIL)
- Sirenotrachyceras, Genus Sirenotrachyceras Krystyn , 1978 † (TRACHYCERATIDAE) (FOSSIL)
- Siretia, Subgenus Alabastrina (Siretia) P.M. Pallary, 1926 (HELICIDAE)
- siriae, Medora macascarensis siriae H. Nordsieck, 2009 - (CLAUSILIIDAE)
- sirianocoriensis, Orculella sirianocoriensis (A. Mousson, 1854) - (ORCULIDAE)
- sirianocoriensis libanotica, Orculella sirianocoriensis libanotica (H.B. Tristram, 1865) - (ORCULIDAE)
- sirikulensis, Lymnaea sirikulensis (G. Nevill, 1878) - (LYMNAEIDAE)
- sirinensis, Ambigua fuscolabiata sirinensis (W. Kobelt, 1904) - (HELICIDAE)
- sirionos, Anodontes sirionos D'Orbigny, 1835 - syn of: Anodontites patagonica J.B.P.A. Lamarck, 1819 - (UNIONIDAE)
- Sirius, Genus Sirius C. Hedley, 1900 (CAPULIDAE)
- sirius, Siphonaria sirius H.A. Pilsbry, 1894 - (SIPHONARIIDAE)
- sirius, Astraea sirius C. Hedley, 1923 † - syn of: Astraea tentoriiformis I.H. Jonas, 1844 † - (TURBINIDAE) (FOSSIL)
- siro, Mancinella siro (J.T. Kuroda, 1931) - (MURICIDAE)
- siro, Thais siro J.T. Kuroda, 1931 - syn of: Mancinella siro (J.T. Kuroda, 1931) - (MURICIDAE)
- sirodoti, Naticopsis sirodoti (E.C. Munier-Chalmas, 1876 †) - (DELPHINULOPSIDAE) (FOSSIL)
- sirotina, Helix sirotina A. Adams, 1868 - syn of: Bradybaena weyrichii L. von Schrenck, 1867 - (HELICIDAE)
- sirotskii, Corbicula sirotskii V.V. Bogatov & Y.I. Starobogatov, 1994 - (CYRENIDAE)
- sirotskii, Cincinna sirotskii Y.I. Starobogatov & F. Zatrawkin, 1985 - (VALVATIDAE)
- sirpata, Asthenotoma sirpata F.P. Jousseaume, 1891 - (BORSONIIDAE)
- sirventi, Conus sirventi A. Feneaux, 1943 - syn of: Cylinder textile (C. Linnaeus, 1758) - (CONIDAE)
- sirventi, Cycloteuthis sirventi L.M.A.O.E. Joubin, 1919 - (CYCLOTEUTHIDAE)
- sisal, Cerion sisal W.J. Clench & C.G. Aguayo, 1952 - (CERIONIDAE)
- sisalensis, Bulimus sisalensis P.M.A. Morelet, 1849 - syn of: Mesembrinus multilineatus (T. Say, 1825) - (BULIMULIDAE)
- sisalensis, Felimare sisalensis D. Ortigosa & Á. Valdés, 2012 - (CHROMODORIDIDAE)
- Sisenna, Genus Sisenna Koken, 1896 † (PLEUROTOMARIIDAE) (FOSSIL)
- sishaensis, Pleurobranchus sishaensis (S.P. Zhang & G.Y. Lin, 1965) - (PLEUROBRANCHIDAE)
- sishaensis, Oscaniella sishaensis S.P. Zhang & G.Y. Lin, 1965 - syn of: Pleurobranchus sishaensis (S.P. Zhang & G.Y. Lin, 1965) - (PLEUROBRANCHIDAE)
- siskiyouense, Oregoniceras siskiyouense Anderson 1902 † - syn of: Subprionocyclus neptuni (H.B. Geinitz, 1849 †) - (COLLIGNONICERATIDAE) (FOSSIL)
- siskiyouensis, Desmophyllites siskiyouensis Anderson, 1958 † - syn of: Desmophyllites diphylloides (E. Forbes, 1846 †) - (DESMOCERATIDAE) (FOSSIL)
- siskiyouensis, Paleochiton siskiyouensis Hoare, 2000 † - (GOTLANDOCHITONIDAE) (FOSSIL)
- siskiyouensis, Calibasis acutifilosa siskiyouensis (H.A. Pilsbry, 1899) - (SEMISULCOSPIRIDAE)
- Siskiyouspira, Genus Siskiyouspira Rohr, 1980 † (EUOMPHALIDAE) (FOSSIL)
- Siskyouspira, Genus Siskyouspira Rohr, 1980 † (ARCHAEOGASTROPODA (UNASSIGNED)) (FOSSIL)
- sismondae, Dendrodoris sismondae J.B. Vérany, 1846 - syn of: Dendrodoris limbata (G.L.C.F.D. Cuvier, 1804) - (DENDRODORIDIDAE)
- sismondae, Doris sismondae J.B. Vérany, 1846 - syn of: Dendrodoris limbata (G.L.C.F.D. Cuvier, 1804) - (DORIDIDAE)
- sismondae, Trochus sismondae A. Issel, 1869 - syn of: Peasiella isseli (A. Issel, 1869) - (TROCHIDAE)
- sismondae, Periglypta sismondae P. Calcara, 1845 - syn of: Gouldia minima (G. Montagu, 1803) - (VENERIDAE)
- sismondai, Urosalpinx sismondai (O.G. Michelotti, 1847 †) - (MURICIDAE) (FOSSIL)
- sismondai, Cyllene sismondai (L.M.D. Bellardi, 1882 †) - (NASSARIIDAE) (FOSSIL)
- sismondai, Lyrischapa sismondai (d'Archiac & Haime, 1853 †) - (VOLUTIDAE) (FOSSIL)
- sismondai, Lyrischapa sismondai Givens, 1991 † - syn of: Lyrischapa vredenburgi D. Merle & al., 2014 † - (VOLUTIDAE) (FOSSIL)
- sismondana, Spirancilla sismondana (L.M.D. Bellardi, 1882 †) - (ANCILLARIIDAE) (FOSSIL)
- sismondiana, Rissoina sismondiana A. Issel, 1869 - (RISSOINIDAE)
- sismonsi, Alvania sismonsi R. Marquet, 1997 † - (RISSOIDAE) (FOSSIL)
- sisophonensis, Potamides sisophonensis Delpey, 1942 † - (POTAMIDIDAE) (FOSSIL)
- sisophonensis, Ptychomphalus sisophonensis Delpey, 1941 † - syn of: Glabrocingulum sarrauti (Mansuy, 1912 †) - (PTYCHOMPHALIDAE) (FOSSIL)
- sisophonensis, Cylindritopsis sisophonensis Delpey, 1941 † - (SOLENISCIDAE) (FOSSIL)
- sisparica, Cryptozona sisparica (W.T. Blanford, 1866) - (ARIOPHANTIDAE)
- sisquocensis, Arca sisquocensis N.W. Reinhart, 1937 † - (ARCIDAE) (FOSSIL)
- sisquocensis, Spisula sisquocensis R. Arnold, 1907 † - (MACTRIDAE) (FOSSIL)
- sissilabre, Liguus fasciatus sissilabre Nodal, 1947 - (ORTHALICIDAE)
- sista, Erronea sista T. Iredale, 1939 - syn of: Erronea cylindrica sowerbyana F.A. Schilder, 1932 - (CYPRAEIDAE)
- Sistaniana, Subgenus Melanopsis (Sistaniana) Z.I. Izzatullaev & Y.I. Starobogatov, 1984 (MELANOPSIDAE)
- sistanica, Bithynia sistanica (T.N. Annandale & B. Prashad, 1919) - (BITHYNIIDAE)
- sistanica, Gabbia sistanica T.N. Annandale & B. Prashad, 1919 - syn of: Bithynia sistanica (T.N. Annandale & B. Prashad, 1919) - (BITHYNIIDAE)
- sistanica, Melanopsis sistanica Z.I. Izzatullaev & Y.I. Starobogatov, 1984 - (MELANOPSIDAE)
- sistroida, Nassarius sistroida G. Nevill & H. Nevill, 1874 - syn of: Hebra subspinosa (J.B.P.A. Lamarck, 1822) - (NASSARIIDAE)
- sistroidea, Hebra sistroidea G. Nevill & H. Nevill, 1874 - syn of: Hebra subspinosa (J.B.P.A. Lamarck, 1822) - (NASSARIIDAE)
- sistroidea, Nassa sistroidea G. Nevill & H. Nevill, 1874 - syn of: Hebra subspinosa (J.B.P.A. Lamarck, 1822) - (NASSARIIDAE)
- Sistrum, syn of: Genus Drupa P.F. Röding, 1798 (MURICIDAE)
- sisurnius, Planorbis sisurnius C. Hedley, 1918 - (PLANORBIDAE)
- sisyphus, Arcestes sisyphus Mojsisovics, 1875 † - (ARCESTIDAE) (FOSSIL)
- Sita, Genus Sita J.O. Semper, 1862 † (ASTARTIDAE) (FOSSIL)
- sitaensis, Amurbuldowskia sitaensis V.V. Bogatov & Y.I. Starobogatov, 1996 - syn of: Anemina arcaeformis (P.M. Heude, 1877) - (UNIONIDAE)
- sitakaraensis, Batissa sitakaraensis M. Suzuki, 1941 † - (CYRENIDAE) (FOSSIL)
- Sitala, Genus Sitala H. Adams, 1865 (ARIOPHANTIDAE)
- Sitalarion, Subgenus Helixarion (Sitalarion) F.C. Baker, 1941 (HELICARIONIDAE)
- sitaliformis, Coneuplecta sitaliformis (O.F. von Möllendorff, 1897) - (EUCONULIDAE)
- Sitalina, syn of: Genus Coneuplecta O.F. von Möllendorff, 1893 (EUCONULIDAE)
- Sitalinopsis, Genus Sitalinopsis K.H.J. Thiele, 1931 (HELICARIONIDAE)
- sitangkaianum, Vexillum sitangkaianum C.N. Cate, 1968 - (COSTELLARIIDAE)
- sitanius, Serratifusus sitanius K. Fraussen & R. Hadorn, 2003 - (BUCCINIDAE)
- sitchana, Littorina sitchana R.A. Philippi, 1846 - syn of: Littorina sitkana R.A. Philippi, 1846 - (LITTORINIDAE)
- sitchana castaneus, Littorina sitchana castaneus A.T. von Middendorff, 1849 - syn of: Littorina sitkana R.A. Philippi, 1846 - (LITTORINIDAE)
- sitchana zonatus, Littorina sitchana zonatus A.T. von Middendorff, 1849 - syn of: Littorina sitkana R.A. Philippi, 1846 - (LITTORINIDAE)
- sitchensis, Littorina sitchensis G. Nevill, 1885 - syn of: Littorina sitkana R.A. Philippi, 1846 - (LITTORINIDAE)
- sitchensis, Tonicella sitchensis (A.T. von Middendorff, 1847) - (MOPALIIDAE)
- siticulosa, Candidula siticulosa P. Fagot, 1883 - syn of: Candidula gigaxii (L. Pfeiffer, 1850) - (HYGROMIIDAE)
- sitiens, Sonorella sitiens H.A. Pilsbry & J.H. Ferriss, 1915 - syn of: Sonorella montezuma H.A. Pilsbry & J.H. Ferriss, 1919 - (HELMINTHOGLYPTIDAE)
- sitiensis, Mastus sitiensis W.J.M. Maassen, 1995 - (ENIDAE)
- sitiensis, Xerocrassa sitiensis (H. von Maltzan, 1887) - (HYGROMIIDAE)
- sitifiensis, Cernuella sitifiensis J.R. Bourguignat, 1882 - syn of: Cernuella virgata (E.M. Da Costa, 1778) - (HYGROMIIDAE)
- sitioi, Turbonilla sitioi (S. Nomura, 1936) - (PYRAMIDELLIDAE)
- sitioi, Chemnitzia sitioi S. Nomura, 1936 - syn of: Turbonilla sitioi (S. Nomura, 1936) - (PYRAMIDELLIDAE)
- sitirigahamana, Odostomia sitirigahamana S. Nomura, 1938 - (PYRAMIDELLIDAE)
- sitirighamana, Megastomia sitirighamana (S. Nomura, 1938) - (PYRAMIDELLIDAE)
- sitiroi, Odostomia sitiroi S. Nomura, 1937 - (PYRAMIDELLIDAE)
- sitis, Monodonta sitis C.A. Récluz, 1843 - syn of: Phorcus articulatus (J.B.P.A. Lamarck, 1822) - (TROCHIDAE)
- sitis, Osilinus sitis C.A. Récluz, 1843 - syn of: Phorcus articulatus (J.B.P.A. Lamarck, 1822) - (TROCHIDAE)
- SITITHECIDAE Sysoev, 1968 † - Family (HYOLITHA-ORTHOTHECIDA [Order]) (FOSSIL)
- sitizoi, Miralda sitizoi (S. Nomura, 1937) - (PYRAMIDELLIDAE)
- sitkaensis, Odostomia sitkaensis S. Clessin, 1900 - (PYRAMIDELLIDAE)
- sitkana, Littorina sitkana R.A. Philippi, 1846 - (LITTORINIDAE)
- sitkana, Thais sitkana W.H. Dall, 1915 - syn of: Nucella lamellosa sitkana W.H. Dall, 1915 - (MURICIDAE)
- sitkana, Nucella lamellosa sitkana W.H. Dall, 1915 - (MURICIDAE)
- sitkana, Macoma sitkana W.H. Dall, 1900 - syn of: Macoma calcarea (J.F. Gmelin, 1792) - (TELLINIDAE)
- sitkana atkana, Littorina sitkana atkana W.H. Dall, 1902 - (LITTORINIDAE)
- sitkensis, Tonicella sitkensis A.T. von Middendorff, 1847 - syn of: Tonicella sitchensis (A.T. von Middendorff, 1847) - (MOPALIIDAE)
- sitkensis, Velutina sitkensis A. Adams, 1853 - syn of: Velutina plicatilis (O.F. Müller, 1776) - (VELUTINIDAE)
- sitta, Frigidoalvania sitta (M. Yokoyama, 1926) - (RISSOIDAE)
- sitta, Nishiyama sitta M. Yokoyama, 1926 - syn of: Frigidoalvania sitta (M. Yokoyama, 1926) - (RISSOIDAE)
- situla, Nassa situla (L.A. Reeve, 1846) - (MURICIDAE)
- situlum, Buccinum situlum L.A. Reeve, 1846 - syn of: Nassa situla (L.A. Reeve, 1846) - (BUCCINIDAE)
- Siungiudella, Genus Siungiudella Lutikov, 1984 † (CARDIIDA (UNASSIGNED)) (FOSSIL)
- siuyingae, Entemnotrochus siuyingae G.Y. Lin, 1975 † - (PLEUROTOMARIIDAE) (FOSSIL)
- siva, Ammonites siva E. Forbes, 1846 † - syn of: Sphenodiscus siva (E. Forbes, 1846 †) - (AMMONITIDA (unassigned)) (FOSSIL)
- siva, Phrontis siva H.B. Preston, 1904 - syn of: Nassarius jacksonianus (J.R.C. Quoy & J.P. Gaimard, 1833) - (NASSARIIDAE)
- siva, Syrnola siva M. Yokoyama, 1922 - (PYRAMIDELLIDAE)
- siva, Sphenodiscus siva (E. Forbes, 1846 †) - (SPHENODISCIDAE) (FOSSIL)
- sivagherrianum, Cyathopoma sivagherrianum R.H. Beddome, 1875 - (CYCLOPHORIDAE)
- Sivajiceras, Genus Sivajiceras Spath, 1928 † (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- sivalensis, Gyraulus sivalensis (S. Clessin, 1884) - (PLANORBIDAE)
- Sivasi, Genus Sivasi S.K. Sahin, S.B. Koca & M.Z. Yildirim, 2012 (HYDROBIIDAE)
- siveci, Vitrea siveci F. Riedel & F. Velkovrh, 1976 - (PRISTILOMATIDAE)
- Sivella, Genus Sivella W.T. Blanford, 1863 (HELICARIONIDAE)
- sivertseni, Philobrya sivertseni T. Soot-Ryen, 1960 - (PHILOBRYIDAE)
- sivicksi, Teredo sivicksi R.C. Miller, 1956 - syn of: Dicyathifer mannii (B.H. Wright, 1866) - (TEREDINIDAE)
- sivicksi, Dicyathifer sivicksi R.C. Miller, 1956 - syn of: Dicyathifer mannii (B.H. Wright, 1866) - (TEREDINIDAE)
- sixaolus, Decipifus sixaolus A.A. Olsson & J.T.L. McGinty, 1958 - (COLUMBELLIDAE)
- sixi, Bernaya sixi J.M. Pacaud & A. Robert, 2016 † - (CYPRAEIDAE) (FOSSIL)
- sixta, Oenopota sixta W.H. Dall in C.T. Simpson, 1919 - syn of: Oenopota elegans (H.P.C. Møller, 1842) - (MANGELIIDAE)
- sixtoi, Chrysallida sixtoi A. Peñas & E. Rolán, 1998 - (PYRAMIDELLIDAE)
- Sizilites, Genus Sizilites Toumansky , 1937 † (ADRIANITIDAE) (FOSSIL)
- sjoestedti, Limicolariopsis sjoestedti A. d'Ailly, 1910 - (ACHATINIDAE)
- sjostedti, Pseudoglessula sjostedti (A. d'Ailly in H.A. Pilsbry, 1885) - (SUBULINIDAE)
- Sjostedtina, Subgenus Trochonanina (Sjostedtina) B. Verdcourt, 1961 (UROCYCLIDAE)
- skadarskii, Bithynia skadarskii P. Glöer & V.M. Pešic, 2007 - (BITHYNIIDAE)
- skalaense, Subormoceras skalaense (Kiselev, 1968 †) - (PSEUDORTHOCERATIDAE) (FOSSIL)
- skalbergensis, Ambonychinia skalbergensis Isberg, 1934 † - (AMBONYCHIIDAE) (FOSSIL)
- skambos, Splendrillia skambos R.N. Kilburn, 1988 - (DRILLIIDAE)
- skanderbegianus, Allaegopis skanderbegianus W. Polinski, 1924 - syn of: Allaegopis skandergianus (W. Polinski, 1924) - (ZONITIDAE)
- skanderbegis, Procarnites skanderbegis Artyaber, 1911 † - syn of: Procarnites kokeni (Arthaber, 1908 †) - (PROCARNITIDAE) (FOSSIL)
- skandergianus, Allaegopis skandergianus (W. Polinski, 1924) - (ZONITIDAE)
- Skaptotion, Genus Skaptotion Curry, 1965 † (THECOSOMATA (UNASSIGNED)) (FOSSIL)
- Skarlatella, Subgenus Musculus (Skarlatella) M. Glibert & L. van de Poel, 1965 (MYTILIDAE)
- skeeti, Cardium skeeti C. Hedley, 1906 - syn of: Afrocardium richardi (Audoin, 1826) - (CARDIIDAE)
- skelettensis, Patella skelettensis W. Massier, 2009 - (PATELLIDAE)
- skeltoni, Douvillelia skeltoni Alencaster & Pantoja-Alor, 1998 † - (POLYCONITIDAE) (FOSSIL)
- Skena, Genus Skena † (ARCHAEOGASTROPODA (UNASSIGNED)) (FOSSIL)
- Skenea, Genus Skenea J. Fleming, 1825 (SKENEIDAE)
- Skeneia, syn of: Genus Skenea J. Fleming, 1825 (SKENEIDAE)
- SKENEIDAE Clark, 1851 - Family (GASTROPODA-VETIGASTROPODA [Subclass]-TROCHOIDEA [Superfamily])
- Skenella, Genus Skenella G.J. Pfeffer in E.C. Von Martens & G.J. Pfeffer, 1886 (CINGULOPSIDAE)
- skeneoides, Scissurella skeneoides D.L. Geiger, 2012 - (SCISSURELLIDAE)
- Skeneoides, Genus Skeneoides A. Warén, 1992 (SKENEIDAE)
- skeneoides, Ponderinella skeneoides E. Rolán & F. Rubio, 2002 - (TORNIDAE)
- SKENEOPSIDAE Iredale, 1915 - Family (GASTROPODA-CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-LITTORINOIDEA [Superfamily])
- Skeneopsis, Genus Skeneopsis T. Iredale, 1915 (SKENEOPSIDAE)
- skenia, Empleconia skenia W.H. Dall, 1916 - syn of: Limopsis vaginata W.H. Dall, 1891 - (LIMOPSIDAE)
- Skeniopsis, syn of: Genus Skeneopsis T. Iredale, 1915 (SKENEOPSIDAE)
- skertehly, Leptopoma skertehly (E.A. Smith) - (CYCLOPHORIDAE)
- sketi, Saxurinator sketi (J. Bole, 1960) - (HYDROBIIDAE)
- sketi, Dalmatella sketi F. Velkovrh, 1970 - (HYDROBIIDAE)
- sketi, Hadziella sketi J. Bole, 1961 - (HYDROBIIDAE)
- skhiadica, Pseudamnicola skhiadica (Bukowski, 1896 †) - (HYDROBIIDAE) (FOSSIL)
- skhiadica, Valvata skhiadica Bukowski, 1896 † - (VALVATIDAE) (FOSSIL)
- skhiadica conica, Pseudamnicola skhiadica conica Willmann, 1981 † - (HYDROBIIDAE) (FOSSIL)
- skhiadicus, Gyraulus skhiadicus Bukowski, 1896 - syn of: Gyraulus doricus (Bukowski, 1896 ) - (PLANORBIDAE)
- skianni, Pleuromya skianni McLearn, 1945 † - (PLEUROMYIDAE) (FOSSIL)
- skidegatense, Protogrammoceras skidegatense Smith & Tipper, 1996 † - (HILDOCERATIDAE) (FOSSIL)
- skidegatense, Stephanoceras skidegatense J.J.F. Whiteaves, 1876 † - (STEPHANOCERATIDAE) (FOSSIL)
- skidegatensis, Puzosia skidegatensis McLearn, 1972 † - (DESMOCERATIDAE) (FOSSIL)
- skidegatensis, Odostomia skidegatensis P. Bartsch, 1912 - (PYRAMIDELLIDAE)
- skidgatensis, Nelltia skidgatensis (J.J.F. Whiteaves, 1884 †) - (TELLINIDAE) (FOSSIL)
- skinneri, Oligospira skinneri (L.A. Reeve, 1854) - (ACAVIDAE)
- skinneri, Aeolidia skinneri E.F. Kelaart, 1859 - (AEOLIDIIDAE)
- skinneri, Semicassis skinneri J. Marwick, 1928 † - (CASSIDAE) (FOSSIL)
- skinneri, Protoceras skinneri Patton & Taylor, 1973 † - (CERATITIDA (UNASSIGNED)) (FOSSIL)
- skinneri, Eugeniconus nobilis skinneri (A.J. Da Motta, 1982) - (CONIDAE)
- skinneri, Monodilepas skinneri H.J. Finlay, 1928 - (FISSURELLIDAE)
- skinneri, Xenodiscus skinneri Miller & Furnish, 1940 † - syn of: Nielsenoceras skinneri (Miller & Furnish, 1940 †) - (MEEKOCERATIDAE) (FOSSIL)
- skinneri, Nielsenoceras skinneri (Miller & Furnish, 1940 †) - (PARACELTITIDAE) (FOSSIL)
- skinneri, Physa skinneri D.W. Taylor, 1954 - (PHYSIDAE)
- skinneri, Prostacheoceras skinneri Miller, 1945 † - (VIDRIOCERATIDAE) (FOSSIL)
- skinoshitai, Abra skinoshitai J.T. Kuroda & T. Habe in T. Habe, 1958 - syn of: Abra kinoshitai J.T. Kuroda & T. Habe in T. Habe, 1958 - (SEMELIDAE)
- skipetarica, Agardhiella skipetarica (A.J. Wagner, 1914) - (ARGNIDAE)
- skipetarica, Montenegrina skipetarica L. Soós, 1940 - (CLAUSILIIDAE)
- skipetarica, Superba skipetarica (P. Subai, 1995) - (HELICIDAE)
- skipetarica asketa, Superba skipetarica asketa (P. Subai, 1995) - (HELICIDAE)
- skipetarica danyii, Montenegrina skipetarica danyii Z. Fehér & M. Szekeres, 2016 - (CLAUSILIIDAE)
- skipetarica edmundi, Montenegrina skipetarica edmundi M. Szekeres, 2006 - syn of: Montenegrina rugilabris edmundi M. Szekeres, 2006 - (CLAUSILIIDAE)
- skipetarica ersekensis, Montenegrina skipetarica ersekensis H. Nordsieck, 1996 - (CLAUSILIIDAE)
- skipetarica flava, Montenegrina skipetarica flava Z. Eröss & M. Szekeres, 2006 - (CLAUSILIIDAE)
- skipetarica fusca, Montenegrina skipetarica fusca Z. Fehér & M. Szekeres, 2016 - syn of: Montenegrina hiltrudae fusca Z. Fehér & M. Szekeres, 2016 - (CLAUSILIIDAE)
- skipetarica gurelurensis, Montenegrina skipetarica gurelurensis Z. Fehér & M. Szekeres, 2016 - (CLAUSILIIDAE)
- skipetarica irmengardis, Montenegrina skipetarica irmengardis M. Klemm, 1962 - syn of: Montenegrina rugilabris irmengardis (M. Klemm, 1962) - (CLAUSILIIDAE)
- skipetarica konitsae, Montenegrina skipetarica konitsae H. Nordsieck, 1972 - (CLAUSILIIDAE)
- skipetarica lambdaformis, Montenegrina skipetarica lambdaformis P.L. Reischütz & H.A. Sattmann, 1990 - syn of: Montenegrina rugilabris lambdaformis P.L. Reischütz & H.A. Sattmann, 1990 - (CLAUSILIIDAE)
- skipetarica nobilis, Montenegrina skipetarica nobilis Z. Eröss & M. Szekeres, 2006 - (CLAUSILIIDAE)
- skipetarica pifkoi, Montenegrina skipetarica pifkoi Z. Fehér & M. Szekeres, 2016 - (CLAUSILIIDAE)
- skipetarica pindica, Montenegrina skipetarica pindica H. Nordsieck, 1988 - (CLAUSILIIDAE)
- skipetarica puskasi, Montenegrina skipetarica puskasi Z. Fehér & M. Szekeres, 2016 - (CLAUSILIIDAE)
- skipetarica remota, Montenegrina skipetarica remota Z. Fehér & M. Szekeres, 2006 - (CLAUSILIIDAE)
- skipetarica robusta, Montenegrina skipetarica robusta H. Nordsieck, 2009 - syn of: Montenegrina hiltrudae robusta H. Nordsieck, 2009 - (CLAUSILIIDAE)
- skipetarica rugosa, Montenegrina skipetarica rugosa Z. Fehér & M. Szekeres, 2006 - (CLAUSILIIDAE)
- skipetarica thysi, Montenegrina skipetarica thysi F.E. Loosjes & F.E. Loosjes, 1988 - (CLAUSILIIDAE)
- skipetarica timeae, Montenegrina skipetarica timeae Z. Eröss & M. Szekeres, 2006 - syn of: Montenegrina timeae Z. Eröss & M. Szekeres, 2006 - (CLAUSILIIDAE)
- skipetarica voidomatis, Montenegrina skipetarica voidomatis H. Nordsieck, 1974 - (CLAUSILIIDAE)
- skipetarica welterschultesi, Montenegrina skipetarica welterschultesi Z. Fehér & M. Szekeres, 1999 - syn of: Montenegrina rugilabris welterschultesi Z. Fehér & M. Szekeres, 1999 - (CLAUSILIIDAE)
- skipetaricus, Paraegopis skipetaricus A.J. Wagner, 1914 - (ZONITIDAE)
- skiptonensis, Chesapecten skiptonensis (W.C. Mansfield, 1936 †) - (PECTINIDAE) (FOSSIL)
- Skirroceras, Genus Skirroceras Mascke, 1906 † (STEPHANOCERATIDAE) (FOSSIL)
- sknips, Prolixodens sknips M. Jay & J. Drivas, 2002 - (CERITHIOPSIDAE)
- skoglundae, Caecum skoglundae M. Pizzini, B.K. Raines & I. Nofroni, 2007 - (CAECIDAE)
- skoglundae, Cotonopsis skoglundae P.O. Jung, 1989 - (COLUMBELLIDAE)
- skoglundae, Gradiconus skoglundae M.J. Tenorio, J.K. Tucker & A. Chaney, 2012 - (CONIDAE)
- skoglundae, Crassinella skoglundae E.V. Coan, 1979 - (CRASSATELLIDAE)
- skoglundae, Cirsotrema skoglundae E.F. Garcia, 2010 - (EPITONIIDAE)
- skoglundae, Epitonium skoglundae H. DuShane, 1974 - (EPITONIIDAE)
- skoglundae, Murexsul skoglundae (B.W. Myers, C.M. Hertz & D'Attilio, 1993) - (MURICIDAE)
- skoglundae, Zacatrophon skoglundae R. Houart, 2010 - (MURICIDAE)
- skoglundae, Periploma skoglundae P.H. Valentich-Scott & E.V. Coan, 2010 - (PERIPLOMATIDAE)
- skoglundi, Lepidozona skoglundi (A. Ferreira, 1986) - (ISCHNOCHITONIDAE)
- Skoglundia, Subgenus Asthenothaerus (Skoglundia) E.V. Coan, 1990 (THRACIIDAE)
- Skolekostephanus, Genus Skolekostephanus Buckman, 1921 † (STEPHANOCERATIDAE) (FOSSIL)
- skolix, Joculator skolix M. Jay & J. Drivas, 2002 - (CERITHIOPSIDAE)
- skolops, Batoteuthis skolops A.T. Young & C.F.E. Roper, 1968 - (BATOTEUTHIDAE)
- skomma, Crenella skomma (R.A. Mclean & J.S. Schwengel, 1944) - (MYTILIDAE)
- skoogi, Adinopsis skoogi N.H. Odhner, 1923 † - (NASSARIIDAE) (FOSSIL)
- skorikovi, Cincinna skorikovi (W.A. Lindholm, 1911) - (VALVATIDAE)
- skorkovensis, Rutitrigonia skorkovensis Pugaczewska, 1977 † - (RUTITRIGONIIDAE) (FOSSIL)
- skorochodi, Dacryomya skorochodi Kiparisova, 1938 † - (NUCULANIDAE) (FOSSIL)
- skorochodi, Burijites skorochodi (Burij & Zharikovi, 1972 †) - (USSURITIDAE) (FOSSIL)
- skottsberg, Ptychodon skottsberg N.H. Odhner, 1921 - (CHAROPIDAE)
- Skoumalia, syn of: Genus Eulophoceras Hyatt , 1903 † (SPHENODISCIDAE) (FOSSIL)
- skouraensis, Alabastrina skouraensis (P.M. Pallary, 1933) - (HELICIDAE)
- skradinensis, Lanzaia skradinensis J. Bole, 1992 - (HYDROBIIDAE)
- skuphoi, Canthidomus costatiformis skuphoi Papp & Psarianos, 1955 † - (MELANOPSIDAE) (FOSSIL)
- skupica, Grossuana euxina skupica P. Radoman, 1973 - (HYDROBIIDAE)
- skurensis, Melanopsis skurensis Papp, 1955 † - (MELANOPSIDAE) (FOSSIL)
- skutarensis, Dieneroceras skutarensis (Arthaber, 1911 †) - (COLUMBITIDAE) (FOSSIL)
- skutarensis, Lecanites skutarensis Arthaber, 1911 † - syn of: Dieneroceras skutarensis (Arthaber, 1911 †) - (LECANITIDAE) (FOSSIL)
- skutaris, Radix skutaris P. Glöer & V.M. Pešic, 2008 - (LYMNAEIDAE)
- skvorzovi, Neopronorites skvorzovi (Tchernow, 1907 †) - (PRONORITIDAE) (FOSSIL)
- Skwarkoella, Genus Skwarkoella M.R. Cooper, 1991 † (TRIGONIIDAE) (FOSSIL)
- skwortzovi, Fruticicola skwortzovi Y. Tzvetkov, 1940 - (BRADYBAENIDAE)
- skwortzowi, Bradybaena skwortzowi Y. Tzvetkov, 1940 - (BRADYBAENIDAE)
- skyensis, Assiminea skyensis Anderson & Cox † - (ASSIMINEIDAE) (FOSSIL)
- Skyles, Genus Skyles Saul & Popenoe, 1993 † (FASCIOLARIIDAE) (FOSSIL)
- slacksmithae, Westrapyrgus slacksmithae W.F. Ponder, A. Clark & W.B. Miller, 1999 - (HYDROBIIDAE)
- slacksmithae, Mitra slacksmithae M.P. Marrow, 2013 - (MITRIDAE)
- sladeni, Cerion sladeni H.A. Pilsbry & H. Black, 1930 - (CERIONIDAE)
- sladensis, Phragmolites sladensis (Reed, 1921 †) - (BUCANIIDAE) (FOSSIL)
- sladensis, Conradella sladensis Reed, 1921 † - syn of: Phragmolites sladensis (Reed, 1921 †) - (BUCANIIDAE) (FOSSIL)
- sladensis, Ctenodonta sladensis Reed, 1905 † - (CTENODONTIDAE) (FOSSIL)
- slapcinskyi, Inella slapcinskyi E. Rolán & R. Fernández-Garcés, 2008 - (TRIPHORIDAE)
- slateri, Antimitrella slateri Lussi, 2017 - (COLUMBELLIDAE)
- slatteri, Cardinia slatteri Wilson & Crick, 1889 † - (CARDINIIDAE) (FOSSIL)
- slatteri, Cryptaulax slatteri R. Tate, 1870 † - (CRYPTAULACIDAE) (FOSSIL)
- Slatterites, Genus Slatterites Spath, 1923 † (OXYNOTICERATIDAE) (FOSSIL)
- Slava, Genus Slava Barrande, 1881 † (SLAVIDAE) (FOSSIL)
- slaveyae, Bythinella slaveyae P. Glöer & D.G. Georgiev, 2011 - (BYTHINELLIDAE)
- slavi, Onchidoris slavi (A.V. Martynov, T.A. Korshunova, N. Sanamyan & K. Sanamyan, 2009) - (ONCHIDORIDIDAE)
- slavi, Adalaria slavi A.V. Martynov, T.A. Korshunova, N. Sanamyan & K. Sanamyan, 2009 - syn of: Onchidoris slavi (A.V. Martynov, T.A. Korshunova, N. Sanamyan & K. Sanamyan, 2009) - (ONCHIDORIDIDAE)
- slavica, Macedonica slavica H. Nordsieck, 1974 - (CLAUSILIIDAE)
- slavichi, Tancredia slavichi Marincovich Jr., 1993 † - (TANCREDIIDAE) (FOSSIL)
- SLAVIDAE Kríž, 1982 † - Family (BIVALVIA-PTERIOMORPHIA [Subclass]-CYRTODONTIDA [Order]-CARDIOLOIDEA [Superfamily]) (FOSSIL)
- slaviki, Baboria slaviki (J.F. Babor, 1897 †) - (CLAUSILIIDAE) (FOSSIL)
- slavini, Subowenites slavini A.M. Popov, 1962 † - (MELAGATHICERATIDAE) (FOSSIL)
- Slavinka, Genus Slavinka Kríž, 1982 † (SLAVIDAE) (FOSSIL)
- slavinka, Sinuitina slavinka Horný, 1962 † - (TROPIDODISCIDAE) (FOSSIL)
- slavonica, Pironaea slavonica Hilber, 1902 † - (HIPPURITIDAE) (FOSSIL)
- slavonica, Prososthenia slavonica (Š. Brusina, 1874 †) - (HYDROBIIDAE) (FOSSIL)
- slavonica, Belgrandiella slavonica P. Radoman, 1975 - (HYDROBIIDAE)
- slavonica, Melanopsis slavonica M. von Neumayr, 1875 † - (MELANOPSIDAE) (FOSSIL)
- slavonica atanasiui, Melanopsis slavonica atanasiui Soverth, 1953 † - (MELANOPSIDAE) (FOSSIL)
- slavonicus, Theodoxus slavonicus (Š. Brusina, 1878 †) - (NERITIDAE) (FOSSIL)
- slavonicus, Gyraulus slavonicus (Š. Brusina, 1897) - (PLANORBIDAE)
- slavyanica, Grossuana slavyanica D.G. Georgiev & P. Glöer, 2013 - (HYDROBIIDAE)
- slawsoni, Phragmolites slawsoni Hussey, 1926 † - (BUCANIIDAE) (FOSSIL)
- slehoferi, Slehoferites slehoferi Valent & al., 2011 † - (CARINOLITHIDAE) (FOSSIL)
- Slehoferia, Genus Slehoferia Rohr & Frýda, 2001 † (TROCHONEMATIDAE) (FOSSIL)
- Slehoferites, Genus Slehoferites Valent & al., 2011 † (CARINOLITHIDAE) (FOSSIL)
- Slemmestadoceras, Genus Slemmestadoceras Kröger, 2008 † (ORTHOCERIDA (UNASSIGNED)) (FOSSIL)
- sleursi, Ammonicera sleursi A.F. Sartori & R. Bieler, 2014 - (OMALOGYRIDAE)
- sleursi, Alvania sleursi (B. Amati, 1987) - (RISSOIDAE)
- sleursi, Ailinzebina sleursi M.J. Faber, 2013 - (RISSOINIDAE)
- slevini, Asperiscala slevini L.G. Hertlein, 1939 - syn of: Epitonium acapulcanum W.H. Dall, 1917 - (EPITONIIDAE)
- slevini, Epitonium slevini A.M. Strong & L.G. Hertlein, 1939 - syn of: Epitonium acapulcanum W.H. Dall, 1917 - (EPITONIIDAE)
- slevini, Triphora slevini F. Baker, 1926 - (TRIPHORIDAE)
- slieringsi, Alvania slieringsi H.J. Hoenselaar & J. Goud, 1998 - (RISSOIDAE)
- slikorum, Setia slikorum (A. Verduin, 1984) - (RISSOIDAE)
- slimora, Elysia slimora Er. Marcus & Ev. Marcus, 1966 - (PLAKOBRANCHIDAE)
- slipensis, Priscofusus slipensis W.O. Addicott, 1976 † - (FASCIOLARIIDAE) (FOSSIL)
- slizewiczi, Buchiceras slizewiczi Fallot 1885 † - (ACANTHOCERATIDAE) (FOSSIL)
- sloaneana, Pleurodonte sloaneana (R.J. Shuttleworth, 1861) - (PLEURODONTIDAE)
- sloanei, Ustronia sloanei A.V.M.D. D'Orbigny, 1842 - syn of: Ustronia sloanii (A.V.M.D. D'Orbigny, 1842) - (HELICINIDAE)
- sloanei, Onchidium sloanei G.L.C.F.D. Cuvier, 1816 - syn of: Vaginulus sloanii (G.L.C.F.D. Cuvier, 1817) - (ONCHIDIIDAE)
- sloanei, Veronicella sloanei A.E.J. Férussac - syn of: Veronicella cubensis (L. Pfeiffer, 1840) - (VERONICELLIDAE)
- sloani, Hemiliostraca sloani A. Warén, 1980 - (EULIMIDAE)
- sloani, Glycymeris sloani Ward & B.W. Blackwelder, 1987 † - (GLYCYMERIDIDAE) (FOSSIL)
- sloani, Phos sloani J. Gardner & T.H. Aldrich, 1919 † - (NASSARIIDAE) (FOSSIL)
- sloani, Eutrephoceras sloani Reeside, 1924 † - (NAUTILIDAE) (FOSSIL)
- sloani, Nototodarus sloani (J.E. Gray, 1849) - (OMMASTREPHIDAE)
- sloani, Promachoteuthis sloani A.T. Young, M. Vecchione & U. Piatkowski, 2006 - (PROMACHOTEUTHIDAE)
- sloani, Yezoites delicatulus sloani Cobban, 1983 † - (SCAPHITIDAE) (FOSSIL)
- sloani, Strombus pugilis sloani W.E. Leach, 1814 - (STROMBIDAE)
- sloani, Veronicella sloani G.L.C.F.D. Cuvier, 1817 - syn of: Vaginulus sloanii (G.L.C.F.D. Cuvier, 1817) - (VERONICELLIDAE)
- sloani floridanus, Phos sloani floridanus W.C. Mansfield, 1930 † - (NASSARIIDAE) (FOSSIL)
- sloani philippinensis, Nototodarus sloani philippinensis N.A. Voss, 1962 - syn of: Nototodarus hawaiiensis (S.S. Berry, 1912) - (OMMASTREPHIDAE)
- sloaniana, Zebina sloaniana (A.V.M.D. D'Orbigny, 1842) - (ZEBINIDAE)
- sloanii, Ustronia sloanii (A.V.M.D. D'Orbigny, 1842) - (HELICINIDAE)
- sloanii, Onchidium sloanii G.L.C.F.D. Cuvier, 1817 - syn of: Vaginulus sloanii (G.L.C.F.D. Cuvier, 1817) - (ONCHIDIIDAE)
- sloanii, Solen sloanii J.E. Gray, 1843 - (SOLENIDAE)
- sloanii, Vaginulus sloanii (G.L.C.F.D. Cuvier, 1817) - (VERONICELLIDAE)
- sloanii, Veronicella sloanii A.E.J. Férussac - syn of: Veronicella cubensis (L. Pfeiffer, 1840) - (VERONICELLIDAE)
- sloanii aedilii, Ustronia sloanii aedilii (C.G. Aguayo & C. de la Torre, 1954) - (HELICINIDAE)
- sloanii coffeae, Veronicella sloanii coffeae T.D.A. Cockerell, 1893 - syn of: Veronicella cubensis (L. Pfeiffer, 1840) - (VERONICELLIDAE)
- sloati, Ocenebra sloati L.G. Hertlein, 1958 - syn of: Coralliophila orcuttiana W.H. Dall, 1919 - (MURICIDAE)
- sloati, Siliqua sloati L.G. Hertlein, 1961 - syn of: Siliqua alta (W.J. Broderip & G.B. I Sowerby, 1829) - (PHARIDAE)
- sloati hambachi, Ocenebra sloati hambachi L.G. Hertlein, 1958 - syn of: Coralliophila orcuttiana W.H. Dall, 1919 - (MURICIDAE)
- sloatianus, Elliptoideus sloatianus (I. Lea, 1840) - (UNIONIDAE)
- slocomi, Orthomyalina slocomi (Sayre, 1931 †) - (MYALINIDAE) (FOSSIL)
- slocomi, Phragmoceras slocomi Foerste, 1929 † - (PHRAGMOCERATIDAE) (FOSSIL)
- Slocomoceras, Genus Slocomoceras Foerste, 1930 † (ACLEISTOCERATIDAE) (FOSSIL)
- slodkevichi, Ainicardita slodkevichi A.M. Popov, 1983 † - (CARDITIDAE) (FOSSIL)
- slodkewitschi, Glycymeris slodkewitschi V.N. Sinelnikova, 1984 † - (GLYCYMERIDIDAE) (FOSSIL)
- slodkewitschi, Nuculana slodkewitschi Slodkewitsch, 1938 ex Kogan MS † - (NUCULANIDAE) (FOSSIL)
- slodkewitschi, Mizuhopecten slodkewitschi V.N. Sinelnikova, 1969 † - (PECTINIDAE) (FOSSIL)
- slodkewitschi, Leporimetis slodkewitschi A.I. Kafanov & al., 1999 † - syn of: Psammotreta dombei (S.C.T. Hanley, 1844) - (TELLINIDAE) (FOSSIL)
- Sloeudaronia, Genus Sloeudaronia Kaim & al., 2006 † (SKENEIDAE) (FOSSIL)
- slootsi, Engina slootsi D. De Jong & H.E. Coomans, 1988 - syn of: Morula biconica (H.M.D. de Blainville, 1832) - (BUCCINIDAE)
- Slosarczykovia, Genus Slosarczykovia M. Lipinski, 2001 (BRACHIOTEUTHIDAE)
- slosarski, Peruinia slosarski (W. . Lubomirski, 1879) - (CLAUSILIIDAE)
- slossi, Paranannites slossi Kummel & Steele, 1962 † - (MELAGATHICERATIDAE) (FOSSIL)
- slovenica, Alzoniella slovenica (Loek & Brtek, 1964) - (HYDROBIIDAE)
- slovenica, Ampezzopleura slovenica A. Kaim & al., 2006 † - (ZYGOPLEURIDAE) (FOSSIL)
- Sluha, Genus Sluha Barrande, 1881 † (MALLETIIDAE) (FOSSIL)
- sluiteri, Proneomenia sluiteri A.A.W. Hubrecht, 1880 - (PRONEOMENIIDAE)
- Sluzka, Genus Sluzka Barrande, 1881 † (VLASTIDAE) (FOSSIL)
- smaesarnensis, Aulacospira smaesarnensis S. Panha & J.B. Burch, 2001 - (HYPSELOSTOMATIDAE)
- smalli, Prunum smalli J. Espinosa & J.A. Ortea, 2002 - (MARGINELLIDAE)
- smaraensis, Eremina smaraensis J. Ahuir, 2015 - (HELICIDAE)
- smaragda, Phyllaplysia smaragda K.B. Clark, 1977 - (APLYSIIDAE)
- Smaragdella, Subgenus Smaragdia (Smaragdella) F.C. Baker, 1923 † (NERITIDAE) (FOSSIL)
- Smaragdia, Genus Smaragdia A. Issel, 1869 (NERITIDAE)
- smaragdina, Aeolidia smaragdina J. Alder & A. Hancock, 1851 - syn of: Flabellina gracilis (J. Alder & A. Hancock, 1844) - (AEOLIDIIDAE)
- smaragdina, Chloraea smaragdina (J.P.S. Grateloup, 1840) - (BRADYBAENIDAE)
- smaragdina, Helicostyla smaragdina L.A. Reeve, 1842 - (BRADYBAENIDAE)
- smaragdina, Bulla smaragdina W.P.E.S. Rüppell & F.S. Leuckart, 1830 - syn of: Phanerophthalmus smaragdinus (W.P.E.S. Rüppell & F.S. Leuckart, 1830) - (BULLIDAE)
- smaragdina, Bulla smaragdina A. Adams, 1874 - syn of: Smaragdinella calyculata (W.J. Broderip & G.B. I Sowerby, 1829) - (BULLIDAE)
- smaragdina, Aldisa smaragdina J.A. Ortea, A.M. Pérez & E.M. Llera, 1982 - (CADLINIDAE)
- smaragdina, Chromodoris smaragdina A.A. Gould, 1852 - syn of: Doris smaragdina (A.A. Gould, 1852) - (CHROMODORIDIDAE)
- smaragdina, Doris smaragdina (A.A. Gould, 1852) - (DORIDIDAE)
- smaragdina, Flabellina smaragdina J. Alder & A. Hancock, 1851 - syn of: Flabellina gracilis (J. Alder & A. Hancock, 1844) - (FLABELLINIDAE)
- smaragdina, Peltospira smaragdina A. Warén & P. Bouchet, 2001 - (PELTOSPIRIDAE)
- smaragdina, Electroma smaragdina L.A. Reeve, 1857 - syn of: Electroma alacorvi (L.W. Dillwyn, 1817) - (PTERIIDAE)
- smaragdina, Craspedodonta smaragdina H.E. Anton, 1838 - syn of: Cristaria plicata (W.E. Leach, 1815) - (UNIONIDAE)
- smaragdina lutea, Helicostyla smaragdina lutea C.G. Semper, 1877 - (BRADYBAENIDAE)
- smaragdina nigrescens, Helicostyla smaragdina nigrescens (C.G. Semper, 1877) - (BRADYBAENIDAE)
- smaragdina zonifera, Helicostyla smaragdina zonifera L.A. Reeve, 1842 - (BRADYBAENIDAE)
- Smaragdinella, Genus Smaragdinella A. Adams & L.A. Reeve, 1848 (HAMINOEIDAE)
- SMARAGDINELLIDAE - syn of Family: HAMINOEIDAE
- smaragdinus, Phanerophthalmus smaragdinus (W.P.E.S. Rüppell & F.S. Leuckart, 1830) - (HAMINOEIDAE)
- smaragdinus, Ischnochiton smaragdinus (G.F. Angas, 1867) - (ISCHNOCHITONIDAE)
- smaragdinus, Haploplax smaragdinus (G.F. Angas, 1867) - syn of: Ischnochiton smaragdinus (G.F. Angas, 1867) - (ISCHNOCHITONIDAE)
- smaragdinus, Stiliger smaragdinus K. Baba, 1949 - (LIMAPONTIIDAE)
- smaragdinus, Perna smaragdinus J.F. Gmelin, 1791 - syn of: Perna viridis (C. Linnaeus, 1758) - (MYTILIDAE)
- smaragdinus, Trochus smaragdinus T.A. de M. Monterosato, 1880 - syn of: Jujubinus striatus (C. Linnaeus, 1758) - (TROCHIDAE)
- smaragdinus, Jujubinus striatus smaragdinus (P. Dautzenberg, 1883) - (TROCHIDAE)
- smaragdinus albina, Trochus smaragdinus albina M.E.J. Bucquoy, P. Dautzenberg & G.F. Dollfus, 1884 - syn of: Jujubinus striatus (C. Linnaeus, 1758) - (TROCHIDAE)
- Smaragdista, syn of: Genus Smaragdia A. Issel, 1869 (NERITIDAE)
- Smaragdista, syn of: Genus Smaragdia A. Issel, 1869 (NERITIDAE)
- smaragdites, Parreysia smaragdites W.H. Benson, 1862 - (UNIONIDAE)
- smaragdovae, Turkmenamnicola smaragdovae (Abrikosov & Y. Tzvetkov, 1945) - (HYDROBIIDAE)
- smaragdula, Paralagena smaragdula C. Linnaeus, 1758 - syn of: Latirolagena smaragdulus (C. Linnaeus, 1758) - (RANELLIDAE)
- smaragdulus, Buccinum smaragdulus C. Linnaeus, 1758 - syn of: Latirolagena smaragdulus (C. Linnaeus, 1758) - (BUCCINIDAE)
- smaragdulus, Latirolagena smaragdulus (C. Linnaeus, 1758) - (FASCIOLARIIDAE)
- smaragdulus, Latirus smaragdulus C. Linnaeus, 1758 - syn of: Latirolagena smaragdulus (C. Linnaeus, 1758) - (FASCIOLARIIDAE)
- smaragdus, Trochus smaragdus L.A. Reeve, 1861 - (TROCHIDAE)
- smaragdus, Lunella smaragdus (J.F. Gmelin, 1791) - (TURBINIDAE)
- Smarangia, syn of: Genus Samarangia W.H. Dall, 1902 (VENERIDAE)
- Smeagol, Genus Smeagol S. Tillier & W.F. Ponder, 1992 (SMEAGOLIDAE)
- SMEAGOLIDAE Tillier & Ponder, 1992 - Family (GASTROPODA-HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-EUPULMONATA [Order]-ELLOBIOIDEA [Superfamily])
- Smeatonia, Genus Smeatonia T. Iredale, 1941 (CAMAENIDAE)
- smedleyi, Aeolidia smedleyi E.F. Kelaart, 1858 - (AEOLIDIIDAE)
- smedleyi, Octopus smedleyi C.W. Robson, 1932 - syn of: Amphioctopus aegina (J.E. Gray, 1849) - (OCTOPODIDAE)
- smeeii, Indotrigonia smeeii (J. de C. Sowerby, 1840) † - (TRIGONIIDAE) (FOSSIL)
- smekhovi, Ciliatocardium smekhovi A.I. Kafanov & Savizky, 1982 † - (CARDIIDAE) (FOSSIL)
- Smekhoviella, syn of: Genus Modiolus J.B.P.A. Lamarck, 1799 (MYTILIDAE)
- Smendovia, Genus Smendovia Tournouër, 1882 † (MELANOPSIDAE) (FOSSIL)
- smetanai, Circotheca smetanai Valent & al., 2012 † - (CIRCOTHECIDAE) (FOSSIL)
- smeurorum, Bulimulus smeurorum A.S.H. Breure, 1974 - syn of: Bostryx tyleri W.H. Dall, 1912 - (BULIMULIDAE)
- Smichovia, Genus Smichovia Frýda & Manda, 1997 † (PERUNELIDAE) (FOSSIL)
- smidti, Scutalus smidti F. Haas, 1955 - (BULIMULIDAE)
- smidti, Lyonsiella smidti (H.B.S. Friele, 1886) - (LYONSIELLIDAE)
- smidti, Lyonciella smidti H.B.S. Friele, 1886 - syn of: Lyonsiella smidti (H.B.S. Friele, 1886) - (VERTICORDIIDAE)
- smikron, Idioraphe smikron Gardner, 1948 † - (TORNIDAE) (FOSSIL)
- Smileoceras, Genus Smileoceras Zhuravleva, 1972 † (DISCOSORIDA (UNASSIGNED)) (FOSSIL)
- smileyi, Venericor aragonia smileyi (E.H. Vokes, 1939 †) - (CARDITIDAE) (FOSSIL)
- Smilodonta, syn of: Genus Similodonta Soot-Ryen, 1964 † (SIMILODONTIDAE) (FOSSIL)
- smirna, Acteocina smirna W.H. Dall, 1919 - (ACTEOCINIDAE)
- smirna, Plagioptycha smirna (W.H. Dall, 1905) - (CEPOLIDAE)
- smirna, Profundiconus smirna (P. Bartsch & H.A. Rehder, 1943) - (CONIDAE)
- smirna, Globidrillia smirna (W.H. Dall, 1881) - (DRILLIIDAE)
- smirna, Drillia smirna W.H. Dall, 1881 - syn of: Globidrillia smirna (W.H. Dall, 1881) - (DRILLIIDAE)
- smirna, Ledina smirna W.H. Dall, 1898 † - (NUCULANIDAE) (FOSSIL)
- smirna, Tindaria smirna W.H. Dall, 1908 - syn of: Neilonella atossa (W.H. Dall, 1908) - (TINDARIIDAE)
- smirnia, Neptunea smirnia (W.H. Dall, 1919) - (BUCCINIDAE)
- smirnoides, Profundiconus smirnoides M.J. Tenorio, 2015 - (CONIDAE)
- smirnovi, Cuspidaria smirnovi E.N. Egorova, 1998 - (CUSPIDARIIDAE)
- smirnovi, Leptochiton smirnovi Sirenko, 2016 - (LEPTOCHITONIDAE)
- smironensis, Landouria smironensis (A. Mousson, 1849) - (CAMAENIDAE)
- smithae, Pseudomalaxis smithae R.N. Kilburn, 1977 - syn of: Pseudomalaxis obolos (K.H. Barnard, 1963) - (ARCHITECTONICIDAE)
- smithae, Heliacus smithae R.N. Kilburn, 1977 - syn of: Pseudomalaxis obolos (K.H. Barnard, 1963) - (ARCHITECTONICIDAE)
- smithae, Rotadiscus smithae (R.K. Dell, 1954) - (CHAROPIDAE)
- smithae, Charopa smithae R.K. Dell, 1954 - syn of: Rotadiscus smithae (R.K. Dell, 1954) - (CHAROPIDAE)
- smithae, Eatoniella smithae W.F. Ponder, 1965 - (EATONIELLIDAE)
- smithae, Panopea smithae A.W.B. Powell, 1950 - (HIATELLIDAE)
- smithae, Ecphora smithae E.J. Petuch, 1988 † - (MURICIDAE) (FOSSIL)
- smithae, Roxania smithae Á. Valdés, 2008 - (SCAPHANDRIDAE)
- Smitharcopagia, syn of: Genus Scutarcopagia H.A. Pilsbry, 1918 (TELLINIDAE)
- smithbasinense, Bassleroceras smithbasinense Kröger & Landing, 2008 † - (BASSLEROCERATIDAE) (FOSSIL)
- smithfieldensis, Ventrilia smithfieldensis Oleksyshyn, 1960 † - (CANCELLARIIDAE) (FOSSIL)
- smithfieldensis, Epitonium smithfieldensis W.C. Mansfield, 1929 † - (EPITONIIDAE) (FOSSIL)
- smithi, Tornatellaria smithi C.M. Cooke & H.A. Pilsbry, 1916 - (ACHATINELLIDAE)
- smithi, Acteocina smithi P. Bartsch, 1915 - (ACTEOCINIDAE)
- smithi, Crimites smithi Toumanskaya, 1937 † - (ADRIANITIDAE) (FOSSIL)
- smithi, Leptachatina smithi E.R. Sykes, 1896 - (AMASTRIDAE)
- smithi, Aplococeras smithi Silberling & Nichols, 1982 † - (APLOCOCERATIDAE) (FOSSIL)
- smithi, Damayantia smithi W.E. Collinge & H.H. Godwin-Austen, 1895 - (ARIOPHANTIDAE)
- smithi, Barleeia smithi P. Bartsch, 1915 - (BARLEEIIDAE)
- smithi, Gymnotoceras smithi Tozer, 1994 † - syn of: Gymnotoceras rotelliformis (F.B. Meek, 1877 †) - (BEYRICHITIDAE) (FOSSIL)
- smithi, Borsonia smithi M.M. Schepman, 1913 - (BORSONIIDAE)
- smithi, Anomacme smithi H. Strebel, 1905 - (BUCCINIDAE)
- smithi, Eosipho smithi (M.M. Schepman, 1911) - (BUCCINIDAE)
- smithi, Chlanidota smithi A.W.B. Powell, 1958 - syn of: Neobuccinum eatoni (E.A. Smith, 1875) - (BUCCINIDAE)
- smithi, Caecum smithi J.G. Cooper, 1872 - syn of: Caecum cooperi Smith, 1860 - (CAECIDAE)
- smithi, Papuina smithi C.R. Böttger, 1919 - (CAMAENIDAE)
- smithi, Amphidromus smithi H.C. Fulton, 1896 - (CAMAENIDAE)
- smithi, Torellia smithi A. Warén, J.P. Arnaud & J.R. Cantera, 1986 - (CAPULIDAE)
- smithi, Aploceras smithi Silberling & Nichols, 1982 † - (CARBACTINOCERATIDAE) (FOSSIL)
- smithi, Cenoceras smithi Foord & Crick, 1890 † - (CENOCERATIDAE) (FOSSIL)
- smithi, Cerion crassiusculum smithi Blanes in H.A. Pilsbry, 1902 - (CERIONIDAE)
- smithi, Seila smithi P. Bartsch, 1915 - syn of: Triphora smithi (P. Bartsch, 1915) - (CERITHIOPSIDAE)
- smithi, Allodiscus smithi H.H. Suter, 1894 - (CHAROPIDAE)
- smithi, Chilina smithi H.A. Pilsbry, 1911 - (CHILINIDAE)
- smithi, Tonicia smithi E.H.J. Leloup, 1980 - (CHITONIDAE)
- smithi, Ryssota oweniana smithi P. Bartsch, 1933 - (CHRONIDAE)
- smithi, Oospira smithi W.J.M. Maassen & E. Gittenberger, 2007 - (CLAUSILIIDAE)
- smithi, Clavatula smithi J. Knudsen, 1952 - (CLAVATULIDAE)
- smithi, Zafra smithi (G.F. Angas, 1877) - (COLUMBELLIDAE)
- smithi, Conus smithi G.F. Angas, 1877 - syn of: Conasprella rutila (K.T. Menke, 1843) - (CONIDAE)
- smithi, Vexillum smithi (G.B. III Sowerby, 1889) - (COSTELLARIIDAE)
- smithi, Rhiostoma smithi P. Bartsch, 1932 - (CYCLOPHORIDAE)
- smithi, Japonia smithi (W. Kobelt & O.F. von Möllendorff, 1897) - (CYCLOPHORIDAE)
- smithi, Erronea pyriformis smithi (G.B. III Sowerby, 1881) - (CYPRAEIDAE)
- smithi, Eatoniella smithi W.F. Ponder, 1965 - syn of: Eatoniella smithae W.F. Ponder, 1965 - (EATONIELLIDAE)
- smithi, Epitonium smithi (G.W. Tryon, 1887) - (EPITONIIDAE)
- smithi, Niso smithi M.M. Schepman, 1909 - (EULIMIDAE)
- smithi, Dolicholatirus smithi M.A. Snyder, 2000 - (FASCIOLARIIDAE)
- smithi, Stearoceras smithi W.J. Gordon, 1964 † - (GRYPOCERATIDAE) (FOSSIL)
- smithi, Metaptychoceras smithi (Woods, 1896 †) - (HAMITIDAE) (FOSSIL)
- smithi, Parmacochlea smithi H.R. Simroth, 1898 - (HELICARIONIDAE)
- smithi, Aplysiopsis smithi Er. Marcus, 1961 - syn of: Aplysiopsis enteromorphae (T.D.A. Cockerell & C.N.E. Eliot, 1905) - (HERMAEIDAE)
- smithi, Trochidrobia smithi W.F. Ponder, R. Hershler & B.W. Jenkins, 1989 - (HYDROBIIDAE)
- smithi, Cyclomya smithi W.B. Marshall, 1926 - syn of: Diplodon delodontus (J.B.P.A. Lamarck, 1819) - (HYRIIDAE)
- smithi, Laternula smithi H.B. Preston, 1905 - syn of: Laternula navicula (L.A. Reeve, 1863) - (LATERNULIDAE)
- smithi, Limatula smithi J.A. Allen, 2004 - (LIMIDAE)
- smithi, Acesta smithi (G.B. III Sowerby, 1888) - (LIMIDAE)
- smithi, Lima smithi P. Bartsch, 1913 - syn of: Acesta philippinensis (P. Bartsch, 1913) - (LIMIDAE)
- smithi, Cyclostrema smithi P. Dautzenberg & H. Fischer, 1897 - (LIOTIIDAE)
- smithi, Paranautilus smithi Kummel, 1953 † - (LIROCERATIDAE) (FOSSIL)
- smithi, Lottia smithi D.R. Lindberg & J.H. McLean, 1981 - (LOTTIIDAE)
- smithi, Myrtea smithi M. Huber, 2015 - (LUCINIDAE)
- smithi, Lyonsiella smithi P. Dautzenberg, 1927 - syn of: Lyonsiella smidti (H.B.S. Friele, 1886) - (LYONSIELLIDAE)
- smithi, Anatina smithi H.B. Preston, 1905 - syn of: Laternula navicula (L.A. Reeve, 1863) - (MACTRIDAE)
- smithi, Palaeoneilo smithi Pojeta & Gilbert-Tomlinson, 1977 † - (MALLETIIDAE) (FOSSIL)
- smithi, Propebela smithi P. Bartsch, 1944 - (MANGELIIDAE)
- smithi, Margarites smithi P. Bartsch, 1927 - (MARGARITIDAE)
- smithi, Medlicottia smithi Miller & Furnish, 1940 † - (MEDLICOTTIIDAE) (FOSSIL)
- smithi, Mitra smithi G.B. III Sowerby, 1889 - syn of: Vexillum smithi (G.B. III Sowerby, 1889) - (MITRIDAE)
- smithi, Mitromorpha smithi P. Dautzenberg & H. Fischer, 1896 - (MITROMORPHIDAE)
- smithi, Neothais smithi (J.W. Brazier, 1889) - (MURICIDAE)
- smithi, Pazinotus smithi (M.M. Schepman, 1911) - (MURICIDAE)
- smithi, Boreotrophon smithi W.H. Dall, 1902 - syn of: Nipponotrophon stuarti (E.A. Smith, 1880) - (MURICIDAE)
- smithi, Morula smithi M.M. Schepman, 1893 - syn of: Semiricinula konkanensis (J.C. Melvill, 1893) - (MURICIDAE)
- smithi, Coralliobia smithi T.C. Yen, 1942 - syn of: Coralliophila fimbriata (A. Adams, 1854) - (MURICIDAE)
- smithi, Urosalpinx smithi M.M. Schepman, 1911 - syn of: Ergalatax contracta (L.A. Reeve, 1846) - (MURICIDAE)
- smithi, Ergalatax smithi M.M. Schepman, 1911 - syn of: Pazinotus smithi (M.M. Schepman, 1911) - (MURICIDAE)
- smithi, Cyllene smithi K. Martin, 1884 † - (NASSARIIDAE) (FOSSIL)
- smithi, Antillophos smithi (R.B. Watson, 1886) - (NASSARIIDAE)
- smithi, Nassa smithi F.P. Marrat, 1877 - syn of: Nassarius concinnus (W.L. Powys, 1835) - (NASSARIIDAE)
- smithi, Aperostoma smithi H.A. Pilsbry & W.F. Clapp, 1902 - (NEOCYCLOTIDAE)
- smithi, Neritina smithi J.E. Gray - (NERITIDAE)
- smithi, Oliva faba smithi F.G. Bridgman, 1906 - (OLIVIDAE)
- smithi, Gyaloceras smithi Whitehouse, 1927 † - (OPPELIIDAE) (FOSSIL)
- smithi, Subsimnia smithi P. Bartsch, 1915 - syn of: Phenacovolva zuidafrikaana (C.N. Cate, 1975) - (OVULIDAE)
- smithi, Phenacovolva smithi P. Bartsch, 1915 - syn of: Phenacovolva zuidafrikaana (C.N. Cate, 1975) - (OVULIDAE)
- smithi, Phenacovolva smithi G.B. Sowerby, 1894 - syn of: Phenacovolva zuidafrikaana (C.N. Cate, 1975) - (OVULIDAE)
- smithi, Baskaniceras smithi Wright & J. Kennedy, 1984 † - (PACHYDISCIDAE) (FOSSIL)
- smithi, Cleopatra mweruensis smithi C.M.F. Ancey, 1906 - (PALUDOMIDAE)
- smithi, Euvola smithi A.A. Olsson, 1914 † - (PECTINIDAE) (FOSSIL)
- smithi, Chlamys smithi G.B. III Sowerby, 1908 - syn of: Cryptopecten nux (L.A. Reeve, 1853) - (PECTINIDAE)
- smithi, Distorsio smithi H.F. Von Maltzan, 1884 - (PERSONIDAE)
- smithi, Philobrya smithi K.H. Barnard, 1964 - syn of: Philobrya sublaevis J.P.L. Pelseneer, 1903 - (PHILOBRYIDAE)
- smithi, Physella smithi F.C. Baker, 1920 - syn of: Physella gyrina smithiana F.C. Baker, 1920 - (PHYSIDAE)
- smithi, Neoplanorbis smithi B. Walker, 1908 - (PLANORBIDAE)
- smithi, Biomphalaria smithi H.B. Preston, 1910 - (PLANORBIDAE)
- smithi, Boreopeltis smithi A. Fuchs & Larson, 2011 † - (PLESIOTEUTHIDIDAE) (FOSSIL)
- smithi, Anculosa smithi C. Goodrich, 1922 - (PLEUROCERIDAE)
- smithi, Inflectarius smithi (W.F. Clapp, 1905) - (POLYGYRIDAE)
- smithi, Nevadisculites smithi Bucher, 1988 † - (PROARCESTIDAE) (FOSSIL)
- smithi, Ptychoceras smithi Woods 1896 † - (PTYCHOCERATIDAE) (FOSSIL)
- smithi, Punctum smithi J.P.E. Morrison, 1935 - (PUNCTIDAE)
- smithi, Tortulosa smithi (E.R. Sykes, 1905) - (PUPINIDAE)
- smithi, Pyramidella smithi A.E. Verrill, 1881 - syn of: Turbonilla unifasciata (P.P. Carpenter, 1857) - (PYRAMIDELLIDAE)
- smithi, Turbonilla smithi H. Strebel, 1905 - syn of: Turbonilla strebeli J.X. Corgan, 1969 - (PYRAMIDELLIDAE)
- smithi, Rissoina smithi G.F. Angas, 1867 - syn of: Rissoina fasciata A. Adams, 1851 - (RISSOINIDAE)
- smithi, Schistoceras smithi Böse, 1919 † - syn of: Schistoceras missouriense Miller & M.J. Faber, 1892 † - (SCHISTOCERATIDAE) (FOSSIL)
- smithi, Scissurella smithi K.H.J. Thiele, 1912 - syn of: Scissurella jucunda E.A. Smith, 1890 - (SCISSURELLIDAE)
- smithi, Sepia smithi W.E. Hoyle, 1885 - (SEPIIDAE)
- smithi, Spondylus smithi H.C. Fulton, 1915 - syn of: Spondylus calcifer Carpenter, 1857 - (SPONDYLIDAE)
- smithi, Cadella smithi (H. Lynge, 1909) - (TELLINIDAE)
- smithi, Tellina smithi H. Lynge, 1909 - syn of: Cadella smithi (H. Lynge, 1909) - (TELLINIDAE)
- smithi, Terebra smithi M. Yokoyama, 1922 † - syn of: Pristiterebra tsuboiana (M. Yokoyama, 1922 †) - (TEREBRIDAE) (FOSSIL)
- smithi, Teredothyra smithi (P. Bartsch, 1927) - (TEREDINIDAE)
- smithi, Teredo smithi P. Bartsch, 1927 - syn of: Teredothyra smithi (P. Bartsch, 1927) - (TEREDINIDAE)
- smithi, Bankia smithi P. Bartsch, 1927 - syn of: Nausitora dunlopei (B.H. Wright, 1864) - (TEREDINIDAE)
- smithi, Tirolites smithi Kummel, 1969 † - (TIROLITIDAE) (FOSSIL)
- smithi, Vitrinella smithi P. Bartsch, 1927 - (TORNIDAE)
- smithi, Circulus smithi K.J. Bush, 1897 - (TORNIDAE)
- smithi, Semailia smithi Morris & Skelton 1995 † - (TRECHMANNELLIDAE) (FOSSIL)
- smithi, Triphora smithi (P. Bartsch, 1915) - (TRIPHORIDAE)
- smithi, Eratoena smithi (F.A. Schilder, 1933) - (TRIVIIDAE)
- smithi, Monilea smithi (W. Wood, 1828) - (TROCHIDAE)
- smithi, Turbo smithi G.B. III Sowerby, 1886 - (TURBINIDAE)
- smithi, Grandidieria burtoni smithi J.R. Bourguignat, 1885 - (UNIONIDAE)
- smithi, Laevicordia smithi B. Prashad, 1932 - syn of: Lyonsiella abscissa J.P.L. Pelseneer, 1911 - (VERTICORDIIDAE)
- smithi, Mekongia smithi (T.C. Yen, 1942) - (VIVIPARIDAE)
- smithi, Pachymelon smithi A.W.B. Powell, 1950 † - (VOLUTIDAE) (FOSSIL)
- smithi, Calliotectum smithi (P. Bartsch, 1942) - (VOLUTIDAE)
- smithi, Fulgoraria smithi (G.B. III Sowerby, 1901) - (VOLUTIDAE)
- smithi, Kurodina smithi (G.B. III Sowerby, 1901) - syn of: Fulgoraria smithi (G.B. III Sowerby, 1901) - (VOLUTIDAE)
- smithi, Alcithoe wilsonae smithi (A.W.B. Powell, 1950) - (VOLUTIDAE)
- smithi, Paravitrea smithi B. Walker, 1928 - (ZONITIDAE)
- smithi fortispiralis, Turbo smithi fortispiralis K. Kreipl & A. Alf, 2003 - (TURBINIDAE)
- Smithia, syn of: Genus Mangelia A. Risso, 1826 (MANGELIIDAE)
- Smithia, syn of: Genus Callostracum E.A. Smith, 1909 (TURRITELLIDAE)
- smithiae, Neniops smithiae (H.A. Pilsbry, 1902) - (CLAUSILIIDAE)
- smithiae, Janthina smithiae L.A. Reeve, 1858 - syn of: Janthina janthina (C. Linnaeus, 1758) - (JANTHINIDAE)
- smithiana, Trishoplita smithiana H.A. Pilsbry, 1901 - (BRADYBAENIDAE)
- smithiana, Bothrocorbula smithiana C.J. Maury, 1912 † - (CORBULIDAE) (FOSSIL)
- smithiana, Corbula smithiana J.W. Brazier, 1880 - (CORBULIDAE)
- smithiana, Dyakia smithiana (G.P.L.K. Gude, 1903) - (DYAKIIDAE)
- smithiana, Peristernia smithiana J.C. Melvill, 1891 - (FASCIOLARIIDAE)
- smithiana, Stegocoelia smithiana J. Donald, 1895 † - (GONIASMATIDAE) (FOSSIL)
- smithiana, Antimargarita smithiana (C. Hedley, 1916) - (MARGARITIDAE)
- smithiana, Monadenia fidelis smithiana S.S. Berry - (MONADENIIDAE)
- smithiana, Uzita smithiana (A.A. Olsson, 1916 †) - (NASSARIIDAE) (FOSSIL)
- smithiana, Amauropsis smithiana C.J. Maury, 1912 † - (NATICIDAE) (FOSSIL)
- smithiana, Oleacina smithiana L. Pfeiffer - (OLEACINIDAE)
- smithiana, Bridouxia smithiana (J.R. Bourguignat, 1885) - (PALUDOMIDAE)
- smithiana, Physella gyrina smithiana F.C. Baker, 1920 - (PHYSIDAE)
- smithiana, Endoplon smithiana (G.P.L.K. Gude, 1896) - (PLECTOPYLIDAE)
- smithiana, Submargarita smithiana C. Hedley, 1916 - syn of: Antimargarita smithiana (C. Hedley, 1916) - (TURBINIDAE)
- smithiana, Colpospira smithiana (J. Donald, 1900) - (TURRITELLIDAE)
- smithiana, Stiracolpus smithiana J. Donald, 1900 - syn of: Colpospira smithiana (J. Donald, 1900) - (TURRITELLIDAE)
- smithiana, Timoclea smithiana M. Huber, 2010 - (VENERIDAE)
- smithiana coxi, Corbula smithiana coxi (H.A. Pilsbry, 1897) - (CORBULIDAE)
- smithiana simpsoni, Oleacina smithiana simpsoni (H.A. Pilsbry, 1907) - (OLEACINIDAE)
- smithianus, Bactrites smithianus Girty, 1909 † - (BACTRITIDAE) (FOSSIL)
- Smithiella, syn of: Genus Mangelia A. Risso, 1826 (MANGELIIDAE)
- Smithiellia, Genus Smithiellia Bucquoy, Dautzenberg & Dollfus, 1898 † (NEOGASTROPODA (UNASSIGNED)) (FOSSIL)
- smithii, Achatina smithii A. Craven - (ACHATINIDAE)
- smithii, Limicolaria smithii H.B. Preston, 1906 - (ACHATINIDAE)
- smithii, Volvula smithii H.A. Pilsbry, 1893 - syn of: Volvulella acuminata (J.G. Bruguière, 1792) - (ACTEOCINIDAE)
- smithii, Astarte smithii W.H. Dall, 1886 - (ASTARTIDAE)
- smithii, Gabbia smithii (R. Tate, 1882) - (BITHYNIIDAE)
- smithii, Placostylus porphyrostomus smithii W. Kobelt, 1891 - (BOTHRIEMBRYONTIDAE)
- smithii, Drymaeus smithii S.I. Da Costa, 1898 - (BULIMULIDAE)
- smithii, Axelella smithii (W.H. Dall, 1888) - (CANCELLARIIDAE)
- smithii, Venericor smithii (T.H. Aldrich, 1894 †) - (CARDITIDAE) (FOSSIL)
- smithii, Cerion smithii H.A. Pilsbry, 1902 - (CERIONIDAE)
- smithii, Cetoconcha smithii W.H. Dall, 1908 - (CETOCONCHIDAE)
- smithii, Carditopsis smithii (W.H. Dall, 1896) - (CONDYLOCARDIIDAE)
- smithii, Vulcanomya smithii W.H. Dall, 1886 - (CUSPIDARIIDAE)
- smithii, Epitonium smithii R.B. Watson, 1897 - syn of: Epitonium tryoni (M.E.A. de Boury, 1913) - (EPITONIIDAE)
- smithii, Austropyrgus smithii (W.F. Petterd, 1889) - (HYDROBIIDAE)
- smithii, Fluvidona smithii W.F. Petterd, 1889 - syn of: Austropyrgus smithii (W.F. Petterd, 1889) - (HYDROBIIDAE)
- smithii, Lacuna smithii H.A. Pilsbry, 1895 - (LITTORINIDAE)
- smithii, Mangelia smithii E. Forbes, 1840 - syn of: Mangelia costulata A. Risso, 1826 - (MANGELIIDAE)
- smithii, Curtitoma trevelliana smithii (J.G. Jeffreys, 1877) - (MANGELIIDAE)
- smithii, Dentimargo smithii (A.E. Verrill, 1885) - (MARGINELLIDAE)
- smithii, Anapella smithii J.E. Gray, 1853 - syn of: Anapella cycladea (J.B.P.A. Lamarck, 1818) - (MESODESMATIDAE)
- smithii, Bulbus smithii J. Brown in Smith, 1839 - (NATICIDAE)
- smithii, Varicobela smithii (T.H. Aldrich, 1885 †) - (NEOGASTROPODA (UNASSIGNED)) (FOSSIL)
- smithii, Diplothyra smithii G.W. Tryon, 1862 - (PHOLADIDAE)
- smithii, Planorbula smithii H.B. Baker, 1945 - (PLANORBIDAE)
- smithii, Eulimella smithii (A.E. Verrill, 1880) - (PYRAMIDELLIDAE)
- smithii, Rissoina smithii G.W. Tryon, 1887 - syn of: Eatoniella caliginosa (E.A. Smith, 1875) - (RISSOINIDAE)
- smithii, Tindaria smithii (W.H. Dall, 1886) - (TINDARIIDAE)
- smithii, Pleurotoma smithii E. Forbes, 1840 - syn of: Mangelia costulata A. Risso, 1826 - (TURRIDAE)
- smithii, Unio smithii E. Griffith & E. Pidgeon, 1833 - syn of: Diplodon chilensis (J.E. Gray, 1852) - (UNIONIDAE)
- smithii, Callocardia smithii W.H. Dall, 1889 - syn of: Isorropodon smithii (W.H. Dall, 1889) - (VENERIDAE)
- smithii, Isorropodon smithii (W.H. Dall, 1889) - (VESICOMYIDAE)
- smithii globula, Astarte smithii globula W.H. Dall, 1886 - syn of: Astarte globula W.H. Dall, 1886 - (ASTARTIDAE)
- smithii?, Semele smithii? W.H. Dall, 1900 † - (SEMELIDAE) (FOSSIL)
- smithiuanum, Brachypodella smithiuanum L. Pfeiffer, 1866 - (UROCOPTIDAE)
- smithorum, Oliva smithorum E.J. Petuch, 1994 † - (OLIVIDAE) (FOSSIL)
- Smithsonella, syn of: Genus Scutarcopagia H.A. Pilsbry, 1918 (TELLINIDAE)
- smithsoni, Haliotis smithsoni P. Bartsch, 1940 - syn of: Haliotis kamtschatkana assimilis W.H. Dall, 1878 - (HALIOTIDAE)
- smithsoni, Turbonilla smithsoni W.H. Dall & P. Bartsch, 1909 - (PYRAMIDELLIDAE)
- smithsoniana, Physella gyrina smithsoniana I. Lea, 1864 - (PHYSIDAE)
- smithvillense, Protocycloceras smithvillense Ulrich & al., 1944 † - (PROTOCYCLOCERATIDAE) (FOSSIL)
- smithvillense, Pionoceras smithvillense Ulrich & al., 1942 † - (TARPHYCERATIDAE) (FOSSIL)
- smithvillensis, Lirodiscus smithvillensis G.F. Harris, 1895 † - (ASTARTIDAE) (FOSSIL)
- smithvillensis, Conus smithvillensis G.F. Harris, 1895 † - (CONIDAE) (FOSSIL)
- smithvillensis, Vokesula smithvillensis (G.F. Harris, 1919 †) - (CORBULIDAE) (FOSSIL)
- smithvillensis, Mirascapha smithvillensis Garvie, 2013 † - (CYLICHNIDAE) (FOSSIL)
- smithvillensis, Limaria smithvillensis H.B. Stenzel & J. Twining, 1957 † - (LIMIDAE) (FOSSIL)
- smithvillensis, Maclurites smithvillensis Fix, 1975 † - syn of: Teiichispira ponderosa (Billings, 1865 †) - (MACLURITIDAE) (FOSSIL)
- smithvillensis, Nuculana smithvillensis † - (NUCULANIDAE) (FOSSIL)
- smithvillensis, Nucula smithvillensis H.B. Stenzel & J. Twining, 1957 † - (NUCULIDAE) (FOSSIL)
- smithvillensis, Cubitostrea smithvillensis G.F. Harris, 1919 † - (OSTREIDAE) (FOSSIL)
- smithvillensis, Katherinella smithvillensis H.B. Stenzel & al., 1957 † - (VENERIDAE) (FOSSIL)
- smithvillensis petropolitana, Vokesula smithvillensis petropolitana H.B. Stenzel & J. Twining, 1957 † - (CORBULIDAE) (FOSSIL)
- Smithvilloceras, Genus Smithvilloceras Ulrich & al., 1943 † (ELLESMEROCERATIDAE) (FOSSIL)
- smithwickense, Nuculoceras smithwickense Plummer & P.H. Scott, 1937 † - syn of: Eoasianites smithwickensis Plummer & P.H. Scott, 1937 † - (CRAVENOCERATIDAE) (FOSSIL)
- smithwickense, Gastrioceras smithwickense A. Hyatt 1884 † - (GASTRIOCERATIDAE) (FOSSIL)
- smithwickensis, Euchondria smithwickensis Newell, 1938 † - (EUCHONDRIIDAE) (FOSSIL)
- smithwickensis, Eoasianites smithwickensis Plummer & P.H. Scott, 1937 † - (NEOICOCERATIDAE) (FOSSIL)
- smithwoodwardi, Miltha smithwoodwardi C.J. Maury, 1917 † - syn of: Miltha chipolana W.H. Dall, 1903 † - (LUCINIDAE) (FOSSIL)
- smithwoodwardi, Sanguinolaria smithwoodwardi C.J. Maury, 1917 † - (PSAMMOBIIDAE) (FOSSIL)
- smiti, Struthioptera smiti R.A. Del Valle & F.A. Medina, 1977 † - (APORRHAIDAE) (FOSSIL)
- smitki, Nucula smitki Author unknown † - (NUCULIDAE) (FOSSIL)
- smitsorum, Nassarius smitsorum H.H. Kool, 1990 - (NASSARIIDAE)
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