- whoi, Xylophaga whoi H. Turner, 2002 - (XYLOPHAGAIDAE)
- whoii, Neilonella whoii J.A. Allen & A. Sanders, 1996 - (NEILONELLIDAE)
- whortani, Artinskia whortani Miller, 1936 † - (MEDLICOTTIIDAE) (FOSSIL)
- whymani, Phyllonotus whymani E.J. Petuch & D.M. Sargent, 2011 - (MURICIDAE)
- whytei, Curvella whytei E.A. Smith, 1899 - (SUBULINIDAE)
- wiaaiglica, Bythiospeum wiaaiglica A. Reischütz & P.L. Reischütz, 2006 - (HYDROBIIDAE)
- wiangariensis, Nitor wiangariensis I. Hyman, 2007 - (HELICARIONIDAE)
- Wichitoceras, Genus Wichitoceras Ulrich & al., 1942 (TROCHOLITIDAE) (FOSSIL)
- wichitorum, Euchemotrema wichitorum R.M. Branson, 1972 - (POLYGYRIDAE)
- wichmanni, Arietites wichmanni Rothpletz, 1892 † - (ARIETITIDAE) (FOSSIL)
- wichmanni, Hemiplecta wichmanni P.B. Sarasin & K.F. Sarasin, 1899 - (ARIOPHANTIDAE)
- wichmanni, Halobia wichmanni Rothpletz, 1892 † - (HALOBIIDAE) (FOSSIL)
- wichmanni fuscominuta, Hemiplecta wichmanni fuscominuta G. Bollinger, 1918 - (ARIOPHANTIDAE)
- Wichmanniceras, Genus Wichmanniceras Leanza, 1945 (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- wickhami, Turbonilla wickhami W.H. Dall & P. Bartsch, 1909 - (PYRAMIDELLIDAE)
- wicomicoensis, Fulpia wicomicoensis (H.G. Richards, 1945 †) - (CYRENIDAE) (FOSSIL)
- wiconiensis, Liospira wiconiensis Pitcher † - (EOTOMARIIDAE) (FOSSIL)
- Widalli, syn of: Genus Oenopota O.A.L. Mφrch, 1852 (MANGELIIDAE)
- widderi, Tornoceras widderi House, 1965 † - (TORNOCERATIDAE) (FOSSIL)
- widebayense, Pseudocidoceras widebayense Westermann, 1969 † - (OTOITIDAE) (FOSSIL)
- widmeriana, Specula widmeriana A. Cecalupo & I. Perugia, 2014 - (NEWTONIELLIDAE)
- wiebesi, Bulimulus wiebesi A.S.H. Breure, 1978 - (BULIMULIDAE)
- wiebesi, Simpulopsis wiebesi A.S.H. Breure, 1975 - (SIMPULOPSIDAE)
- wiechmanni, Turbonilla wiechmanni Speyer, 1870 † - (PYRAMIDELLIDAE) (FOSSIL)
- wiedemayri, Arianta chamaeleon wiedemayri (W. Kobelt, 1903) - (HELICIDAE)
- wiedenmayeri, Anadara wiedenmayeri F. Hodson & al., 1927 † - (ARCIDAE) (FOSSIL)
- wiedenmayeri, Conus wiedenmayeri Jung, 1965 † - (CONIDAE) (FOSSIL)
- wiedenmayeri, Fuciniceras wiedenmayeri Braga & Rivas, 1980 † - (HILDOCERATIDAE) (FOSSIL)
- wiedenmayeri, Ostrea wiedenmayeri F. Hodson & al., 1927 † - (OSTREIDAE) (FOSSIL)
- wiedenmayeri, Periploma venezuelana wiedenmayeri F. Hodson, 1931 - (PERIPLOMATIDAE)
- wiedenmayeri, Hindsiclava wiedenmayeri B.M. Landau, F. Da Silva & S.M. Heitz, 2016 † - (PSEUDOMELATOMIDAE) (FOSSIL)
- wiedenmayeri, Metis barba wiedenmayeri F. Hodson, 1931 † - (TELLINIDAE) (FOSSIL)
- wiedenmayeri, Chionopsis wiedenmayeri (F. Hodson, 1927 †) - (VENERIDAE) (FOSSIL)
- wiedenmeyeri, Narona wiedenmeyeri B.M. Landau & al., 2012 † - (CANCELLARIIDAE) (FOSSIL)
- wiedeyi, Eopleurotoma wiedeyi A.A. Olsson, 1930 † - (TURRIDAE) (FOSSIL)
- Wiedeyoceras, Genus Wiedeyoceras Miller , 1932 (WIEDEYOCERATIDAE) (FOSSIL)
- WIEDEYOCERATIDAE Ruzhencev & Bogoslovskaya, 1978 - Family (CEPHALOPODA-AMMONOIDEA [Subclass]-GONIATITIDA [Order]-GONIOLOBOCERATOIDEA [Superfamily]) (FOSSIL)
- wiedmanni, Josticeras wiedmanni Vasicek & Klajmon, 1998 † - (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- wiedmanni, Lewesiceras wiedmanni Wright & J. Kennedy, 1984 † - (PACHYDISCIDAE) (FOSSIL)
- wiedmanni, Trigonia wiedmanni H.A. Leanza & Garate, 1983 † - (TRIGONIIDAE) (FOSSIL)
- wiegmanni, Rhynchotrochus wiegmanni (E.C. Von Martens, 1894) - (CAMAENIDAE)
- wiegmanni, Fusus wiegmanni H.E. Anton, 1838 - syn of: Monoplex wiegmanni (H.E. Anton, 1838) - (FASCIOLARIIDAE)
- wiegmanni, Monoplex wiegmanni (H.E. Anton, 1838) - (RANELLIDAE)
- Wiegmannia, Genus Wiegmannia Callinge, 1901 (ARIOPHANTIDAE)
- Wiegmannia, syn of: Genus Maurohelix P. Hesse, 1917 (HELICIDAE)
- wiegmanniana, Satsuma wiegmanniana (H.A. Pilsbry, 1901) - (CAMAENIDAE)
- wiegmannii, Dreissena wiegmannii H.C. Küster, 1841 - syn of: Septifer bilocularis (C. Linnaeus, 1758) - (DREISSENIDAE)
- wiegmannii, Septifer wiegmannii H.C. Küster, 1841 - syn of: Septifer bilocularis (C. Linnaeus, 1758) - (MYTILIDAE)
- wielandi, Desmoceras wielandi Böse, 1923 † - syn of: Pseudohaploceras liptoviense (Zeuschner, 1856 †) - (DESMOCERATIDAE) (FOSSIL)
- wienekei, Dolomena wienekei Wiersma & D. Monsecour, 2012 - (STROMBIDAE)
- wienerwaldensis, Hauffenia wienerwaldensis M. Haase, 1992 - (HYDROBIIDAE)
- wienini, Henrigirardia wienini (H. Girardi, 2001) - (MOITESSIERIIDAE)
- wieringai, Thapsia wieringai A.J. de Winter, 2008 - (UROCYCLIDAE)
- wiesei, Albinaria wiesei E. Gittenberger, 1988 - (CLAUSILIIDAE)
- wiesei, Asperitas trochus wiesei B. Dharma, 2012 - (DYAKIIDAE)
- wiesei, Laevidentalium wiesei B. Sahlmann, 2012 - (LAEVIDENTALIIDAE)
- wiesenensis, Valvata soceni wiesenensis Papp, 1954 † - (VALVATIDAE) (FOSSIL)
- wieseorum, Pseudosimnia wieseorum F.Jr. Lorenz, 1985 - (OVULIDAE)
- wieserae, Anachis wieserae (W.C. Mansfield, 1930) - (COLUMBELLIDAE)
- wieseri, Siphonaria wieseri B. Wade, 1926 † - (SIPHONARIIDAE) (FOSSIL)
- wiestii, Turrilites wiestii Sharpe, 1857 † - (TURRILITIDAE) (FOSSIL)
- wiffenae, Pholadidea wiffenae Crampton, 1990 † - (PHOLADIDAE) (FOSSIL)
- wiggi, Pontohedyle wiggi K.M. Jörger & M. Schrödl, 2013 - (PARHEDYLIDAE)
- wigginsi, Aphera wigginsi W.K. Emerson & L.G. Hertlein, 1964 † - (CANCELLARIIDAE) (FOSSIL)
- wightensis, Trigonia wightensis Strand † - (TRIGONIIDAE) (FOSSIL)
- wigleyi, Achatina wigleyi A.R. Mead, 2004 - (ACHATINIDAE)
- wikanderi, Parthenina wikanderi T. Høisæter, 2014 - (PYRAMIDELLIDAE)
- wiktori, Deroceras wiktori A.V. Grossu, 1969 - (AGRIOLIMACIDAE)
- wiktori, Kobeltia wiktori C. Parejo & Maratin, 1990 - (ARIONIDAE)
- wiktori, Agrafia wiktori M. Szarowska & A. Falniowski, 2011 - (HYDROBIIDAE)
- wiktori, Malacolimax wiktori M.R. Alonso & C.M. Ibáñez, 1989 - (LIMACIDAE)
- wiktori, Libania wiktori F. Riedel, 1967 - (OXYCHILIDAE)
- wiktori, Mediterranea wiktori F. Riedel, 1997 - (OXYCHILIDAE)
- wilckensi, Crepidula wilckensi H.J. Finlay, 1924 † - syn of: Maoricrypta radiata (F.W. Hutton, 1873 †) - (CALYPTRAEIDAE) (FOSSIL)
- wilckensi, Eucrassatella wilckensi Median & Rinaldi, 1978 † - (CRASSATELLIDAE) (FOSSIL)
- wilckensi, Favrella wilckensi (J. Favre, 1908 †) - (NEOCOMITIDAE) (FOSSIL)
- wilckinsi, Tikia wilckinsi (Woods 1917) † - (CARDIIDA (UNASSIGNED)) (FOSSIL)
- wilcoxensis, Anahamulina wilcoxensis Imlay, 1960 † - (ANAHAMULINIDAE) (FOSSIL)
- wilcoxensis, Baluchicardia wilcoxensis (W.H. Dall, 1903 †) - (CARDITIDAE) (FOSSIL)
- wilcoxensis, Venericardia wilcoxensis W.H. Dall, 1903 † - syn of: Baluchicardia wilcoxensis (W.H. Dall, 1903 †) - (CARDITIDAE) (FOSSIL)
- wilcoxensis tripla, Baluchicardia wilcoxensis tripla W.H. Dall, 1903 † - syn of: Baluchicardia wilcoxensis (W.H. Dall, 1903 †) - (CARDITIDAE) (FOSSIL)
- wilcoxi, Zoila wilcoxi (W.H. Dall, 1890 †) - (CYPRAEIDAE) (FOSSIL)
- wilcoxi, Thurmanniceras wilcoxi Anderson, 1938 † - (NEOCOMITIDAE) (FOSSIL)
- wilcoxi, Chondropoma wilcoxi H.A. Pilsbry & J. Henderson, 1912 - (POMATIIDAE)
- wilcoxi, Pupina wilcoxi J.C. Cox, 1864 - (PUPINIDAE)
- wilcoxiana, Lyria wilcoxiana T.H. Aldrich, 1894 † - (VOLUTIDAE) (FOSSIL)
- wilcoxii, Bothrocorbula wilcoxii W.H. Dall, 1898 † - (CORBULIDAE) (FOSSIL)
- Wilcoxorbis, syn of: Genus Xolotrema C.S. Rafinesque, 1819 (POLYGYRIDAE)
- wilczeki, Etheripecten wilczeki (F. Toula, 1875 †) - (HETEROPECTINIDAE) (FOSSIL)
- wilczekiformis, Aviculopecten wilczekiformis Licharew, 1927 † - (AVICULOPECTINIDAE) (FOSSIL)
- wildei, Doto wildei Er. Marcus & Ev. Marcus, 1970 - (DOTIDAE)
- wildemani, Achatina wildemani P. Dautzenberg, 1908 - (ACHATINIDAE)
- wilderi, Bulimella fuscobasis wilderi H.A. Pilsbry, 1913 - (ACHATINELLIDAE)
- wilderi, Orobophana uberta wilderi M.C. Neal, 1934 - (HELICINIDAE)
- Wildernessia, Genus Wildernessia Stinchcomb & Angeli, 2002 (MONOPLACOPHORA INCERTAE SEDIS) (FOSSIL)
- wildhorsensis, Megaphyllites wildhorsensis Bucher, 1992 † - (MEGAPHYLLITIDAE) (FOSSIL)
- wildiana, Stenothyra wildiana T. Iredale, 1943 - (STENOTHYRIDAE)
- wildpretii, Spinoaglaja wildpretii (J.A. Ortea, J.J. Bacallado & L. Moro, 2003) - (AGLAJIDAE)
- wildungense, Ponticeras wildungense (Waldschmidt, 1885 †) - (PONTICERATIDAE) (FOSSIL)
- wildungensis, Goniatites wildungensis Waldschmidt, 1885 † - syn of: Ponticeras wildungense (Waldschmidt, 1885 †) - (GONIATITIDAE) (FOSSIL)
- wilesianus, Guraleus wilesianus C. Hedley, 1922 - (MANGELIIDAE)
- wileyi, Sinezona wileyi D.L. Geiger, 2008 - (SCISSURELLIDAE)
- wilfordi, Plectostoma wilfordi (J.J. Vermeulen, 1994) - (DIPLOMMATINIDAE)
- wilfordii, Diaphera wilfordii (S.P. Dance, 1970) - (DIAPHERIDAE)
- wilfordii ectyphus, Diaphera wilfordii ectyphus J.J. Vermeulen, 1990 - (DIAPHERIDAE)
- wilfredi, Megalomphala wilfredi Peel, 1991 † - (BUCANIIDAE) (FOSSIL)
- wilfredi, Palaeocypraea wilfredi Schilder 1928 † - (CYPRAEIDAE) (FOSSIL)
- wilfredi, Rissoella wilfredi (J.H. Gatliff & C.J. Gabriel, 1911) - (RISSOELLIDAE)
- wilhelmense, Coronium wilhelmense (J. Ramírez-Böhme, 1981) - (MURICIDAE)
- wilhelmi, Platyla wilhelmi (A.J. Wagner, 1910) - (ACICULIDAE)
- wilhelmi, Helix wilhelmi L. Pfeiffer, 1866 - syn of: Microconus wilhelmi (L. Pfeiffer, 1866) - (HELICIDAE)
- wilhelmi, Acme wilhelmi A.J. Wagner, 1910 - syn of: Platyla wilhelmi (A.J. Wagner, 1910) - (HYDROBIIDAE)
- wilhelmi, Melanopsis wilhelmi D. Esu & O. Girotti, 2015 † - (MELANOPSIDAE) (FOSSIL)
- wilhelmi, Abbottella wilhelmi (L. Pfeiffer, 1858) - (POMATIIDAE)
- wilhelmi, Microconus wilhelmi (L. Pfeiffer, 1866) - (THYSANOPHORIDAE)
- wilhelmi, Viviparus wilhelmi (T.C. Yen, 1939) - (VIVIPARIDAE)
- wilhelmina, Erosaria wilhelmina A. Kenyon, 1897 - syn of: Erosaria poraria (C. Linnaeus, 1758) - (CYPRAEIDAE)
- wilhelminae, Diplommatina wilhelminae W.J.M. Maassen, 2002 - (DIPLOMMATINIDAE)
- wilhelminae, Helicodonta wilhelminae W.J.M. Maassen, 1991 - (HELICODONTIDAE)
- wilhelminae, Mitromorpha wilhelminae J.J. Van Aartsen, H.P.M.G. Menkhorst & E. Gittenberger, 1984 - (MITROMORPHIDAE)
- wilhelminae, Laevichlamys wilhelminae (A.R.J.B. Bavay, 1904) - (PECTINIDAE)
- wilhelminae maculata, Chlamys wilhelminae maculata A.R.J.B. Bavay, 1904 - syn of: Laevichlamys wilhelminae (A.R.J.B. Bavay, 1904) - (PECTINIDAE)
- wilhelminae vanderblommi, Diplommatina wilhelminae vanderblommi W.J.M. Maassen, 2002 - (DIPLOMMATINIDAE)
- Wilhelminaia, Genus Wilhelminaia H.B. Preston, 1913 (HELICARIONIDAE)
- wilheminae, Mitromorpha wilheminae J.J. Van Aartsen, H.P.M.G. Menkhorst & E. Gittenberger, 1984 - syn of: Mitromorpha wilhelminae J.J. Van Aartsen, H.P.M.G. Menkhorst & E. Gittenberger, 1984 - (MITROMORPHIDAE)
- wilkawillina, Glyptorhagada wilkawillina G.A. Solem, 1992 - (CAMAENIDAE)
- wilkawillina umbilicata, Glyptorhagada wilkawillina umbilicata G.A. Solem, 1992 - (CAMAENIDAE)
- wilkei, Bythinella wilkei M.Z. Yildirim, Ü. Kebapçi & A. Yüce, 2014 - (BYTHINELLIDAE)
- wilkesi, Illawarrotheca wilkesi Malinky, 2009 † - (AUSTRALOTHECIDAE) (FOSSIL)
- wilkesiana, Onoba subantarctica wilkesiana (C. Hedley, 1916) - (RISSOIDAE)
- wilkesleyensis, Pteromya wilkesleyensis L.R. Cox, 1963 † - (CERATOMYIDAE) (FOSSIL)
- wilkiae, Inkinga wilkiae G.B. Sowerby, 1889 - syn of: Inkinga platystoma (E.A. Smith, 1877) - (HORAICLAVIDAE)
- Wilkingia, Genus Wilkingia Wilson, 1959 (SANGUINOLITIDAE) (FOSSIL)
- wilkinsi, Notocypraea comptonii wilkinsi R.J. Griffiths, 1959 - (CYPRAEIDAE)
- wilkinsi, Euterebra wilkinsi S.P. Dance & F.E. Eames, 1966 - syn of: Euterebra fuscobasis (E.A. Smith, 1877) - (TEREBRIDAE)
- Wilkinsonaea, syn of: Subgenus Fadyenia (Blandia) E. Chitty, 1857 (HELICINIDAE)
- wilkinsonaeana, Blandia wilkinsonaeana E. Chitty, 1857 - syn of: Blandia vilkinsoniae (C.B. Adams, 1850) - (HELICINIDAE)
- wilkinsoni, Charopella wilkinsoni (J.W. Brazier, 1889) - (CHAROPIDAE)
- wilkinsoni, Engonoceras wilkinsoni A. Packard, 1956 † - (ENGONOCERATIDAE) (FOSSIL)
- wilkinsonii, Parachondria wilkinsonii (C.B. Adams, 1849) - (POMATIIDAE)
- willani, Cadlina willani M.C. Miller, 1980 - (CADLINIDAE)
- willani, Chromodoris willani W.B. Rudman, 1982 - (CHROMODORIDIDAE)
- willani, Cuthona willani J.L. Cervera, J.C. García-Gómez & P.J. Lopez-Gonzalez, 1992 - (FIONIDAE)
- willani, Mitra willani G.T. Poppe, S.P. Tagaro & R. Salisbury, 2009 - (MITRIDAE)
- willani, Phyllidia willani D.J. Brunckhorst, 1993 - (PHYLLIDIIDAE)
- willani, Nitidotellina willani M. Huber, A. Langleit & K. Kreipl, 2015 - (TELLINIDAE)
- willapaensis, Modiolus willapaensis R.L. Squires & Goedert, 1991 † - (MYTILIDAE) (FOSSIL)
- willardausteni, Anadara willardausteni C.J. Maury, 1917 † - (ARCIDAE) (FOSSIL)
- willardi, Corbula willardi B. Wade, 1926 † - (CORBULIDAE) (FOSSIL)
- willaseni, Turbonilla willaseni F. Lygre, J.A. Kongsrud & C.F.C. Schander, 2011 - (PYRAMIDELLIDAE)
- willcocksi, Unio willcocksi R.B. Newton, 1899 - syn of: Unio abyssinicus E.C. Von Martens, 1866 - (UNIONIDAE)
- willcoxi, Aplysia willcoxi A. Heilprin, 1887 - syn of: Aplysia fasciata J.L.M. Poiret, 1789 - (APLYSIIDAE)
- willcoxi, Trigoniocardia willcoxi (W.H. Dall, 1900 †) - (CARDIIDAE) (FOSSIL)
- willcoxi, Cerithium willcoxi A.A. Olsson & A. Harbison, 1953 † - (CERITHIIDAE) (FOSSIL)
- willcoxi, Vexillum willcoxi (W.H. Dall, 1900 †) - (COSTELLARIIDAE) (FOSSIL)
- willcoxi, Crassatella willcoxi J. Brown & H.A. Pilsbry, 1912 † - (CRASSATELLIDAE) (FOSSIL)
- willcoxi, Cypraeorbis willcoxi W.H. Dall, 1890 † - (CYPRAEIDAE) (FOSSIL)
- willcoxi, Modulus willcoxi W.H. Dall, 1892 † - (MODULIDAE) (FOSSIL)
- willcoxi ballista, Cypraeorbis willcoxi ballista W.H. Dall, 1915 † - (CYPRAEIDAE) (FOSSIL)
- willcoxiana, Niso willcoxiana W.H. Dall, 1889 † - (EULIMIDAE) (FOSSIL)
- willcoxianum, Calliostoma willcoxianum W.H. Dall, 1892 - (CALLIOSTOMATIDAE)
- willcoxianum, Prunum willcoxianum W.H. Dall, 1890 † - (MARGINELLIDAE) (FOSSIL)
- willcoxii, Chama willcoxii W.H. Dall, 1903 † - (CHAMIDAE) (FOSSIL)
- willcoxii, Bothrocorbula willcoxii (W.H. Dall, 1898 †) - (CORBULIDAE) (FOSSIL)
- willdiana, Stenothyra willdiana T. Iredale, 1943 - syn of: Stenothyra wildiana T. Iredale, 1943 - (STENOTHYRIDAE)
- willei, Cyclostrema willei H.B.S. Friele, 1886 - syn of: Skenea basistriata (J.G. Jeffreys, 1877) - (LIOTIIDAE)
- willei, Curtitoma willei H.B.S. Friele, 1877 - syn of: Curtitoma decussata (J.P.Y. Couthouy, 1839) - (MANGELIIDAE)
- willei, Skenea willei H.B.S. Friele, 1886 - (SKENEIDAE)
- willemettii, Crommium willemettii (G.P. Deshayes, 1825 †) - (AMPULLINIDAE) (FOSSIL)
- willeminae, Parthenina willeminae (J.J. Van Aartsen, E. Gittenberger & J. Goud, 2000) - (PYRAMIDELLIDAE)
- willeminae, Chrysallida willeminae J.J. Van Aartsen, E. Gittenberger & J. Goud, 2000 - syn of: Parthenina willeminae (J.J. Van Aartsen, E. Gittenberger & J. Goud, 2000) - (PYRAMIDELLIDAE)
- willemsae, Ameranna willemsae (D. De Jong & H.E. Coomans, 1988) - (BUCCINIDAE)
- Willetia, syn of: Genus Onoba H. Adams & A. Adams, 1852 (RISSOIDAE)
- willetsi, Brachidontes willetsi (J. Marwick, 1928 †) - (MYTILIDAE) (FOSSIL)
- willetti, Astarte willetti W.H. Dall, 1917 - syn of: Astarte compacta Carpenter, 1864 - (ASTARTIDAE)
- willetti, Retidrillia willetti (W.H. Dall, 1919) - (BORSONIIDAE)
- willetti, Aeneator willetti (C.A. Fleming, 1955 †) - (BUCCINIDAE) (FOSSIL)
- willetti, Cerithiopsis willetti P. Bartsch, 1921 - (CERITHIOPSIDAE)
- willetti, Cuspidaria willetti C.A. Fleming, 1948 - (CUSPIDARIIDAE)
- willetti, Epitonium willetti A.M. Strong & L.G. Hertlein, 1937 - (EPITONIIDAE)
- willetti, Helminthoglypta traskii willetti (S.S. Berry, 1920) - (HELMINTHOGLYPTIDAE)
- willetti, Lepidozona willetti (S.S. Berry, 1917) - (ISCHNOCHITONIDAE)
- willetti, Nuculana willetti J. Marwick, 1953 † - (NUCULANIDAE) (FOSSIL)
- willetti, Antiplanes willetti S.S. Berry, 1953 - syn of: Antiplanes thalaea (W.H. Dall, 1902) - (PSEUDOMELATOMIDAE)
- willetti, Turbonilla willetti Smith & W.J. Gordon, 1948 - (PYRAMIDELLIDAE)
- willetti, Odostomia willetti P. Bartsch, 1917 - (PYRAMIDELLIDAE)
- willetti, Scaphander willetti W.H. Dall, 1919 - (SCAPHANDRIDAE)
- willetti, Anticlimax willetti L.G. Hertlein & A.M. Strong, 1951 - (TORNIDAE)
- willetti, Zeacolpus willetti J. Marwick, 1971 † - (TURRITELLIDAE) (FOSSIL)
- willetti, Turritella willetti J.H. McLean, 1970 - (TURRITELLIDAE)
- willetti, Schwartziella willetti (A.M. Strong, 1938) - (ZEBINIDAE)
- willetti catalinae, Lepidozona willetti catalinae G. Willett, 1937 - (ISCHNOCHITONIDAE)
- willeyi, Aulacomyella willeyi D.P. Kelly, 1991 † - (AULACOMYELLIDAE) (FOSSIL)
- willeyi, Halgerda willeyi C.N.E. Eliot, 1904 - (DISCODORIDIDAE)
- willgreeni, Eupachydiscus willgreeni Anderson, 1958 † - (PACHYDISCIDAE) (FOSSIL)
- willi, Bulimus willi W.L.H. Dohrn, 1883 - syn of: Moricandia willi (W.L.H. Dohrn, 1883) - (BULIMULIDAE)
- willi, Moricandia willi (W.L.H. Dohrn, 1883) - (ODONTOSTOMIDAE)
- williamettensis, Nuculana williamettensis Shumard, 1858 - (NUCULANIDAE)
- williamgabbi, Metulella williamgabbi C.J. Maury, 1917 † - syn of: Metulella fusiformis W.M. Gabb, 1873 † - (COLUMBELLIDAE) (FOSSIL)
- williamgabbi, Conus williamgabbi C.J. Maury, 1917 † - (CONIDAE) (FOSSIL)
- williami, Strepsitaurus williami G.A. Solem, 1997 - (CAMAENIDAE)
- williami, Mexicardia williami E. Fischer-Piette, 1977 - syn of: Mexicardia procerum panamense (G.B. I Sowerby, 1833) - (CARDIIDAE)
- williami, Cerodrillia williami P. Bartsch, 1943 - syn of: Viridrillia williami (P. Bartsch, 1943) - (DRILLIIDAE)
- williami, Fusinus williami G.T. Poppe & S.P. Tagaro, 2006 - (FASCIOLARIIDAE)
- williami, Viridrillia williami (P. Bartsch, 1943) - (PSEUDOMELATOMIDAE)
- williami, Haplocochlias williami J.C.N. Barros, F.N. Santos, E. Cabral & F.D. Acioli, 2002 - (SKENEIDAE)
- williami, Triviella williami D. Fehse, 2006 - (TRIVIIDAE)
- Williamia, Genus Williamia T.A. de M. Monterosato, 1884 (SIPHONARIIDAE)
- williamlyonsi, Latirus williamlyonsi E.J. Petuch & D.M. Sargent, 2011 - (FASCIOLARIIDAE)
- williamsae, Engina williamsae G.T. Watters & K. Fraussen, 2015 - (BUCCINIDAE)
- williamsae, Phenacomargarites williamsae B.A. Marshall, 2016 † - (CALLIOSTOMATIDAE) (FOSSIL)
- williamsae, Mitromica williamsae G. Rosenberg & R. Salisbury, 2003 - (COSTELLARIIDAE)
- williamsae, Elliptiolucina williamsae Glover & J.D. Taylor, 2016 - (LUCINIDAE)
- williamsae, Opisthosiphon simpsoni williamsae G.T. Watters & G. Duffy, 2010 - (POMATIIDAE)
- williamsi, Beloceras williamsi Wells, 1956 † - syn of: Wellsites williamsi (Wells, 1956 †) - (BELOCERATIDAE) (FOSSIL)
- williamsi, Bostryx williamsi L. Pfeiffer, 1858 - (BULIMULIDAE)
- williamsi, Aldisa williamsi H.R. Elwood, Á. Valdés & T.M. Gosliner, 2000 - (CADLINIDAE)
- williamsi, Crepidula williamsi W.R. Coe, 1947 - (CALYPTRAEIDAE)
- williamsi, Rhynchotrochus williamsi W.J. Clench & S. Archer, 1936 - (CAMAENIDAE)
- williamsi, Axelella williamsi (R.E. Petit, 1976 †) - (CANCELLARIIDAE) (FOSSIL)
- williamsi, Ceratites williamsi Smith, 1914 † - syn of: Parafrechites dunni (Smith, 1914 †) - (CERATITIDAE) (FOSSIL)
- williamsi, Lyncina lynx williamsi (J.C. Melvill, 1888) - (CYPRAEIDAE)
- williamsi, Woodbridgea williamsi S.S. Berry, 1953 - (DIAPHANIDAE)
- williamsi, Everettia corrugata williamsi T.S. Liew, M. Schilthuizen & J.J. Vermeulen, 2009 - (DYAKIIDAE)
- williamsi, Hypermastus williamsi (B.C. Cotton & F.C. Godfrey, 1932) - (EULIMIDAE)
- williamsi, Cylicioscapha williamsi E.L. Yochelson, 1956 † - (EUOMPHALIDAE) (FOSSIL)
- williamsi, Gastrioceras williamsi Miller & Cline, 1934 † - (GASTRIOCERATIDAE) (FOSSIL)
- williamsi, Domatoceras williamsi Miller & Owen, 1934 † - (GRYPOCERATIDAE) (FOSSIL)
- williamsi, Helminthoglypta stiversiana williamsi (J.G. Cooper, 1876) - (HELMINTHOGLYPTIDAE)
- williamsi, Anahoplites williamsi C.J. Maury, 1936 † - (HOPLITIDAE) (FOSSIL)
- williamsi, Georissa williamsi (H.H. Godwin-Austen) - (HYDROCENIDAE)
- williamsi, Intornites williamsi Tozer, 1994 † - (LONGOBARDITIDAE) (FOSSIL)
- williamsi, Cyclomactra williamsi (J. Marwick, 1948 †) - (MACTRIDAE) (FOSSIL)
- williamsi, Spisula williamsi (S.S. Berry, 1960) - (MACTRIDAE)
- williamsi, Mactra williamsi S.S. Berry, 1960 - syn of: Spisula williamsi (S.S. Berry, 1960) - (MACTRIDAE)
- williamsi, Mitra williamsi W. Newcomb, 1870 - syn of: Nebularia fraga (J.R.C. Quoy & J.P. Gaimard, 1833) - (MITRIDAE)
- williamsi, Ectenocardiomorpha williamsi Isberg, 1934 † - (MODIOLOPSIDAE) (FOSSIL)
- williamsi, Uttleya williamsi A.W.B. Powell, 1952 - syn of: Uttleya ahiparana (A.W.B. Powell, 1927) - (MURICIDAE)
- williamsi, Ecphora meganae williamsi C.J. Ward & Gilinsky, 1988 † - (MURICIDAE) (FOSSIL)
- williamsi, Aviculomyalina williamsi McLearn 1941 † - (MYALINIDAE) (FOSSIL)
- williamsi, Oliva panniculata williamsi J.C. Melvill & R. Standen, 1897 - (OLIVIDAE)
- williamsi, Oxynoticeras williamsi Tutcher & Trueman, 1925 † - (OXYNOTICERATIDAE) (FOSSIL)
- williamsi, Anatsabites williamsi (Miller & Furnish, 1940 †) - (PARAGASTRIOCERATIDAE) (FOSSIL)
- williamsi, Comitas williamsi J. Marwick, 1965 † - (PSEUDOMELATOMIDAE) (FOSSIL)
- williamsi, Pseudoparalegoceras williamsi Miller & Downs, 1948 † - syn of: Phaneroceras kesslerense (Mather, 1915 †) - (PSEUDOPARALEGOCERATIDAE) (FOSSIL)
- williamsi, Microptychis williamsi Knight, 1930 † - (PSEUDOZYGOPLEURIDAE) (FOSSIL)
- williamsi, Monoplex williamsi C.J. Maury, 1910 † - (RANELLIDAE) (FOSSIL)
- williamsi, Arctoprionites williamsi Tozer, 1994 † - syn of: Arctoprionites resseri (Mathews, 1929 †) - (SIBIRITIDAE) (FOSSIL)
- williamsi, Siphonaria williamsi S.S. Berry, 1969 - (SIPHONARIIDAE)
- williamsi, Lobatus williamsi A.A. Olsson & R.E. Petit, 1964 † - (STROMBIDAE) (FOSSIL)
- williamsi, Tellina williamsi Clark, 1895 † - (TELLINIDAE) (FOSSIL)
- williamsi, Wellsites williamsi (Wells, 1956 †) - (TRIAINOCERATIDAE) (FOSSIL)
- williamsi, Buttsoceras williamsi Flower, 1962 † - (TROEDSSONELLIDAE) (FOSSIL)
- williamsi, Marama williamsi J. Marwick, 1927 † - (VENERIDAE) (FOSSIL)
- williamsi, Wiedeyoceras williamsi J.E. McCaleb, 1963 † - (WIEDEYOCERATIDAE) (FOSSIL)
- williamsii, Anodonta williamsii I. Lea, 1862 - syn of: Anodonta cataracta T. Say, 1817 - (UNIONIDAE)
- Williamsoceras, Genus Williamsoceras Flower, 1968 (ALLOTRIOCERATIDAE) (FOSSIL)
- williamsoni, Turrancilla williamsoni E.J. Petuch, 1987 - (ANCILLARIIDAE)
- williamsoni, Arca williamsoni A.A. Olsson, 1967 † - (ARCIDAE) (FOSSIL)
- williamsoni, Anisocardia williamsoni L.R. Cox, 1947 † - (ARCTICIDAE) (FOSSIL)
- williamsoni, Peltoceratoides williamsoni (B. Phillips, 1829 †) - (ASPIDOCERATIDAE) (FOSSIL)
- williamsoni, Pachydiscus williamsoni (C.J. Maury 1930 †) - (DESMOCERATIDAE) (FOSSIL)
- williamsoni, Rugatiscala williamsoni (F.M. Anderson & B. Martin, 1914 †) - (EPITONIIDAE) (FOSSIL)
- williamsoni, Lima williamsoni J. Marwick, 1953 † - (LIMIDAE) (FOSSIL)
- williamsoni, Talochlamys williamsoni (C.A. von Zittel, 1864 †) - (PECTINIDAE) (FOSSIL)
- williamsoni, Endothyrella williamsoni (G.P.L.K. Gude, 1915) - (PLECTOPYLIDAE)
- williamsoni, Tudora williamsoni H.B. Baker, 1923 - (POMATIIDAE)
- williamsoni, Vitrinella williamsoni W.H. Dall, 1892 - (TORNIDAE)
- williamsoni arduennense, Peltoceratoides williamsoni arduennense (A.V.M.D. D'Orbigny, 1847 †) - (ASPIDOCERATIDAE) (FOSSIL)
- williamsoni constantii, Peltoceratoides williamsoni constantii (A.V.M.D. D'Orbigny, 1847 †) - (ASPIDOCERATIDAE) (FOSSIL)
- williamsoni kugleri, Tudora williamsoni kugleri L. Forcart - (POMATIIDAE)
- williamsorum, Calliotectum williamsorum H.A. Rehder, 1972 - syn of: Calliotectum tibiaeforme williamsorum (H.A. Rehder, 1972) - (VOLUTIDAE)
- williamsorum, Calliotectum tibiaeforme williamsorum (H.A. Rehder, 1972) - (VOLUTIDAE)
- willianseverii, Heliacus willianseverii M.J. Tenorio, J.C.N. Barros & al., 2011 - (ARCHITECTONICIDAE)
- willibaldoi, Belocaulus willibaldoi F.P. Ohlweiler, D.J.G. Mota & R. dos Santos Gomes, 2009 - (VERONICELLIDAE)
- willii, Cyamium willii G.J. Pfeffer in E.C. Von Martens & G.J. Pfeffer, 1886 - (CYAMIIDAE)
- willii, Moominia willii J. Gerlach, 2003 - (HYDROBIIDAE)
- Willimactra, Genus Willimactra Saul, 1973 (MACTRIDAE) (FOSSIL)
- willineri, Simpulopsis willineri M.I. Hylton-Scott, 1967 - (SIMPULOPSIDAE)
- willinghamensis, Leptomaria willinghamensis Cox † - (PLEUROTOMARIIDAE) (FOSSIL)
- willinki, Bostryx willinki W.K. Weyrauch, 1964 - (BULIMULIDAE)
- willinki, Naesiotus willinki A.S.H. Breure, 1978 - (BULIMULIDAE)
- willisi, Odostomia willisi P. Bartsch, 1909 - (PYRAMIDELLIDAE)
- willisi, Antigona willisi P.D. Trask, 1922 - syn of: Amiantis callosa (T.A. Conrad, 1837) - (VENERIDAE)
- willistoni, Caryocorbula willistoni Meyer, 1885 † - (CORBULIDAE) (FOSSIL)
- willistoni, Ostrea willistoni Logan, 1899 † - syn of: Ostrea kansasensis Logan, 1899 † - (OSTREIDAE) (FOSSIL)
- willistoni, Turritella willistoni F. Hodson, 1926 † - syn of: Broderiptella caronensis W.C. Mansfield, 1925 † - (TURRITELLIDAE) (FOSSIL)
- willmanni, Valvata heidemariae willmanni T.A. Neubauer, M. Harzhauser, A. Kroh, E. Georgopoulou & O. Mandic, - (VALVATIDAE) (FOSSIL)
- willobianus, Antillipecten willobianus (Cooke, 1919 †) - (PECTINIDAE) (FOSSIL)
- willowi, Alderia willowi K. Krug, Ellingson, D.W. Burton & Á. Valdés, 2007 - (LIMAPONTIIDAE)
- Willungia, Genus Willungia Powell, 1938 (EOCYPRAEIDAE) (FOSSIL)
- wilmae, Cypraecassis wilmae K. Kreipl & A. Alf, 2000 - (CASSIDAE)
- wilmae, Paracenoceras wilmae Jeannet, 1951 † - (PARACENOCERATIDAE) (FOSSIL)
- wilmae, Manzonia wilmae R.G. Moolenbeek & M.J. Faber, 1987 - (RISSOIDAE)
- wilmanae, Tenagodus wilmanae (J.R. le B. Tomlin, 1918) - (SILIQUARIIDAE)
- Wilmattina, Subgenus Parennea (Wilmattina) H.A. Pilsbry & T.D.A. Cockerell, 1933 (STREPTAXIDAE)
- wilmeri, Cancellaria wilmeri G.B. II Sowerby, 1881 - syn of: Fusiaphera macrospira (A. Adams & L.A. Reeve, 1850) - (CANCELLARIIDAE)
- wilmeri, Conus wilmeri G.B. III Sowerby, 1882 - syn of: Turriconus acutangulus (J.B.P.A. Lamarck, 1810) - (CONIDAE)
- wilmeri, Clavus wilmeri (E.A. Smith, 1879) - (DRILLIIDAE)
- wilmeri, Pleurotoma wilmeri E.A. Smith, 1879 - syn of: Clavus wilmeri (E.A. Smith, 1879) - (TURRIDAE)
- wilmerianum, Gyrineum wilmerianum H.B. Preston, 1908 - (RANELLIDAE)
- wilmingtonense, Ophioceras wilmingtonense Foerste † - (OPHIDIOCERATIDAE) (FOSSIL)
- wilmingtonense, Ophidoceras wilmingtonense Foerste † - syn of: Ophioceras wilmingtonense Foerste † - (OPHIDIOCERATIDAE) (FOSSIL)
- wilmingtonensis, Ilyanassa wilmingtonensis Gardner, 1943 † - (NASSARIIDAE) (FOSSIL)
- wilmotensis, Beddomeia wilmotensis W.F. Ponder & K.B. Clark, 1993 - (HYDROBIIDAE)
- wilmoti, Styloptyx wilmoti (P. Bartsch, 1951) - (UROCOPTIDAE)
- wilmoti, Haplocion wilmoti P. Bartsch, 1947 - (UROCOPTIDAE)
- wilmoti, Liocentrum wilmoti P. Bartsch, 1948 - syn of: Anisospira liebmanni (L. Pfeiffer, 1846) - (UROCOPTIDAE)
- wilpenensis, Sinumelon wilpenensis (R. Tate, 1894) - (CAMAENIDAE)
- wilsi, Calliotropis wilsi G.T. Poppe, S.P. Tagaro & H. Dekker, 2006 - (CALLIOTROPIDAE)
- wilsi, Rhizoconus wilsi A. Delsaerdt, 1998 - (CONIDAE)
- wilsi, Costellaria wilsi J.A. Buijse & H. Dekker, 1990 - syn of: Costellaria michaui wilsi J.A. Buijse & H. Dekker, 1990 - (COSTELLARIIDAE)
- wilsi, Costellaria michaui wilsi J.A. Buijse & H. Dekker, 1990 - (COSTELLARIIDAE)
- wilsi, Trochus wilsi Pickery, 1989 - syn of: Trochus cariniferus L.A. Reeve, 1842 - (TROCHIDAE)
- wilsonae, Beloitoceras wilsonae (Miller, Youngquist & Collinson, 1954 †) - (ONCOCERATIDAE) (FOSSIL)
- wilsonae, Endocycloceras wilsonae Ulrich & al., 1944 † - (PROTOCYCLOCERATIDAE) (FOSSIL)
- wilsonae, Daidia wilsonae Frýda & al., 2001 † - (STRAPAROLLINIDAE) (FOSSIL)
- wilsonae, Trochonema wilsonae Steele & Sinclair, 1971 † - (TROCHONEMATIDAE) (FOSSIL)
- wilsonae, Mysticoncha wilsonae (E.A. Smith, 1886) - (VELUTINIDAE)
- wilsonae, Alcithoe wilsonae (A.W.B. Powell, 1933) - (VOLUTIDAE)
- wilsonae, Westonoceras wilsonae Miller, Youngquist & Collinson, 1954 † - syn of: Beloitoceras wilsonae (Miller, Youngquist & Collinson, 1954 †) - (WESTONOCERATIDAE) (FOSSIL)
- wilsonae acuminata, Alcithoe wilsonae acuminata P. Bail & A. Limpus, 2005 - (VOLUTIDAE)
- wilsonae grahami, Alcithoe wilsonae grahami (A.W.B. Powell, 1965) - (VOLUTIDAE)
- wilsonae smithi, Alcithoe wilsonae smithi (A.W.B. Powell, 1950) - (VOLUTIDAE)
- wilsonensis, Attenuata wilsonensis (J.H. Gatliff & C.J. Gabriel, 1913) - (RISSOIDAE)
- wilsoni, Leptoplax wilsoni (E.R. Sykes, 1896) - (ACANTHOCHITONIDAE)
- wilsoni, Fernandezia wilsoni H.A. Pilsbry, 1911 - (ACHATINELLIDAE)
- wilsoni, Glyptonychia wilsoni Pojeta & Gilbert-Tomlinson, 1977 † - (AMBONYCHIIDAE) (FOSSIL)
- wilsoni, Dryptus moritzianus wilsoni H.A. Pilsbry, 1895 - (AMPHIBULIMIDAE)
- wilsoni, Pisinna tumida wilsoni W.F. Ponder & E.K. Yoo, 1976 - (ANABATHRIDAE)
- wilsoni, Goniocheila wilsoni Saul & R.E. Petit, 2001 † - (APORRHAIDAE) (FOSSIL)
- wilsoni, Anadara callicestosa wilsoni Gardner, 1943 - (ARCIDAE)
- wilsoni, Bactroceras wilsoni Flower, 1968 † - syn of: Bactroceras angustisiphonatum (Rüdiger, 1891 †) - (BALTOCERATIDAE) (FOSSIL)
- wilsoni, Bransonia wilsoni Pojeta & Runnegar, 1976 † - (BRANSONIIDAE) (FOSSIL)
- wilsoni, Mulceodens wilsoni Johnston & Chatterton, 1983 † - (BRANSONIIDAE) (FOSSIL)
- wilsoni, Quaestiplax wilsoni T. Iredale & A.F.B. Hull, 1929 - (CALLOCHITONIDAE)
- wilsoni, Youwanjela wilsoni (G.A. Solem, 1979) - (CAMAENIDAE)
- wilsoni, Amplirhagada wilsoni G.A. Solem, 1981 - (CAMAENIDAE)
- wilsoni, Hadra wilsoni G.A. Solem, 1979 - syn of: Youwanjela wilsoni (G.A. Solem, 1979) - (CAMAENIDAE)
- wilsoni, Trachycardium wilsoni R.P.A. Voskuil & W.J.H. Onverwagt, 1991 - syn of: Vasticardium elongatum wilsoni (R.P.A. Voskuil & W.J.H. Onverwagt, 1991) - (CARDIIDAE)
- wilsoni, Vasticardium elongatum wilsoni (R.P.A. Voskuil & W.J.H. Onverwagt, 1991) - (CARDIIDAE)
- wilsoni, Galeodea wilsoni (R. Tate, 1889 †) - (CASSIDAE) (FOSSIL)
- wilsoni, Semicassis wilsoni B.C. Cotton, 1954 - syn of: Semicassis pyrum (J.B.P.A. Lamarck, 1822) - (CASSIDAE)
- wilsoni, Goweroconcha wilsoni T. Iredale, 1944 - (CHAROPIDAE)
- wilsoni, Conus wilsoni E.J. Petuch, 1994 † - (CONIDAE) (FOSSIL)
- wilsoni, Ptychopoma wilsoni (L. Pfeiffer, 1865) - (CYCLOPHORIDAE)
- wilsoni, Palaua wilsoni (C.G. Semper) - (EUCONULIDAE)
- wilsoni, Spinicharybdis wilsoni Rohr & A. Packard, 1982 † - (EUOMPHALIDAE) (FOSSIL)
- wilsoni, Glaphyrites wilsoni Miller, 1949 † - (GLAPHYRITIDAE) (FOSSIL)
- wilsoni, Ludwigia wilsoni Buckman † - (GRAPHOCERATIDAE) (FOSSIL)
- wilsoni, Andangularia wilsoni McRoberts & Blodgett, 2000 † - (HARPIDAE) (FOSSIL)
- wilsoni, Austroharpa wilsoni H.A. Rehder, 1973 - (HARPIDAE)
- wilsoni, Ischnochiton wilsoni E.R. Sykes, 1896 - (ISCHNOCHITONIDAE)
- wilsoni, Hormotoma wilsoni Okulitch, 1935 † - (MURCHISONIIDAE) (FOSSIL)
- wilsoni, Haustellum wilsoni d'Attilio & W.E. Old, 1971 - (MURICIDAE)
- wilsoni, Coralliophila wilsoni G.B. Pritchard & J.H. Gatliff, 1898 - (MURICIDAE)
- wilsoni, Pterorytis wilsoni E.J. Petuch, 1994 † - (MURICIDAE) (FOSSIL)
- wilsoni, Mya wilsoni Ward, 1992 † - (MYIDAE) (FOSSIL)
- wilsoni, Tritia wilsoni N.H. Ludbrook, 1978 † - (NASSARIIDAE) (FOSSIL)
- wilsoni, Nassarius wilsoni (C.B. Adams, 1852) - (NASSARIIDAE)
- wilsoni, Calophos wilsoni W. Allmon, 1990 † - (NASSARIIDAE) (FOSSIL)
- wilsoni, Olivella wilsoni A.A. Olsson, 1956 † - (OLIVELLIDAE) (FOSSIL)
- wilsoni, Roburnella wilsoni (R. Tate, 1889) - (OXYNOIDAE)
- wilsoni, Strombus wilsoni R.T. Abbott, 1967 - syn of: Canarium wilsonorum (R.T. Abbott, 1967) - (STROMBIDAE)
- wilsoni, Canarium wilsoni R.T. Abbott, 1967 - syn of: Canarium wilsonorum (R.T. Abbott, 1967) - (STROMBIDAE)
- wilsoni, Tellina wilsoni Anderson & Martin, 1914 † - (TELLINIDAE) (FOSSIL)
- wilsoni, Turbinella wilsoni T.A. Conrad, 1847 † - (TURBINELLIDAE) (FOSSIL)
- wilsoni, Mysticoncha wilsoni E.A. Smith, 1886 - syn of: Mysticoncha wilsonae (E.A. Smith, 1886) - (VELUTINIDAE)
- wilsoni, Periglypta wilsoni (Hislop, 1859 †) - (VENERIDAE) (FOSSIL)
- Wilsonia, Genus Wilsonia Hudleston, 1896 (MOLLUSCA INCERTAE SEDIS) (FOSSIL)
- wilsoniana, Prionovolva wilsoniana C.N. Cate, 1973 - syn of: Prionovolva brevis (Sowerby, 1825) - (OVULIDAE)
- Wilsoniconcha, Genus Wilsoniconcha W.A. Wenz, 1939 (CHILODONTIDAE)
- wilsonii, Velesunio wilsonii (I. Lea, 1859) - (HYRIIDAE)
- wilsonii, Centralhyria wilsonii T. Iredale, 1934 - syn of: Alathyria pertexta T. Iredale, 1934 - (HYRIIDAE)
- wilsonii, Pholadidea wilsonii T.A. Conrad, 1849 - syn of: Pholadidea melanura (G.B. I Sowerby, 1834) - (PHOLADIDAE)
- wilsonii, Solecurtus wilsonii G.W. Tryon, 1870 - syn of: Solecurtus exaratus (R.A. Philippi, 1849) - (SOLECURTIDAE)
- wilsonii, Succinea wilsonii I. Lea, 1864 - (SUCCINEIDAE)
- wilsonii, Unio wilsonii I. Lea, 1859 - syn of: Velesunio wilsonii (I. Lea, 1859) - (UNIONIDAE)
- Wilsonoceras, Genus Wilsonoceras Foerste, 1929 (APSIDOCERATIDAE) (FOSSIL)
- wilsonorum, Canarium wilsonorum (R.T. Abbott, 1967) - (STROMBIDAE)
- wilsonorum, Strombus wilsonorum E.J. Petuch, 1994 - syn of: Lobatus raninus (J.F. Gmelin, 1791) - (STROMBIDAE)
- wiltonensis, Acteonina wiltonensis J. Lycett, 1863 † - (ACTEONINIDAE) (FOSSIL)
- wiltonensis, Cylindrobullina wiltonensis (Lycett) † - (CYLINDROBULLINIDAE) (FOSSIL)
- wiltonensis, Liostrea wiltonensis (J. Lycett, 1863 †) - (OSTREIDAE) (FOSSIL)
- wiltoni, Astarte wiltoni Morris & J. Lycett, 1855 † - (ASTARTIDAE) (FOSSIL)
- wiltoni, Stiracolpus wiltoni (J. Marwick, 1957 †) - (TURRITELLIDAE) (FOSSIL)
- wiltshirei, Deshayesites wiltshirei Casey † - (DESHAYESITIDAE) (FOSSIL)
- Wiltshireia, Genus Wiltshireia Buckman, 1904 (MOLLUSCA INCERTAE SEDIS) (FOSSIL)
- wimani, Austroficopsis wimani J.D. Stilwell & Zinsmeister, 1992 † - (FICIDAE) (FOSSIL)
- wimmeri, Anodonta wimmeri H. Drouët, 1881 - syn of: Anodonta cygnea (C. Linnaeus, 1758) - (UNIONIDAE)
- wimmisense, Pterocardia wimmisense Rollier, 1912 † - (PTEROCARDIIDAE) (FOSSIL)
- wimmisensis, Ceratomya wimmisensis Gillieron, 1886 † - (CERATOMYIDAE) (FOSSIL)
- winchelli, Aviculopecten winchelli F.B. Meek, 1875 † - (AVICULOPECTINIDAE) (FOSSIL)
- winchelli, Engorthoceras winchelli (Flower, 1963 †) - (ENGORTHOCERATIDAE) (FOSSIL)
- winchelli, Ischyrinia winchelli Billings, 1866 † - (ISCHYRINIIDAE) (FOSSIL)
- winchelli, Orthoceras winchelli Flower, 1963 † - syn of: Engorthoceras winchelli (Flower, 1963 †) - (ORTHOCERATIDAE) (FOSSIL)
- Winchelloceras, Genus Winchelloceras Ruzhencev , 1965 (GIRTYOCERATIDAE) (FOSSIL)
- winchesterae, Carinodrillia winchesterae H.A. Pilsbry, 1922 † - (PSEUDOMELATOMIDAE) (FOSSIL)
- winckworthi, Erosaria turdus winckworthi F.A. Schilder & M. Schilder, 1938 - (CYPRAEIDAE)
- winckworthi, Otinodoris winckworthi K.M. White, 1948 - syn of: Asteronotus raripilosus (F.D. Abraham, 1877) - (DISCODORIDIDAE)
- winckworthi, Ischnochiton winckworthi E.H.J. Leloup, 1936 - (ISCHNOCHITONIDAE)
- winckworthi, Callucina winckworthi (J.M.R.M. Viader, 1951) - (LUCINIDAE)
- winckworthi, Hirtomurex winckworthi (H.C. Fulton, 1930) - (MURICIDAE)
- winckworthi, Latiaxis winckworthi H.C. Fulton, 1930 - syn of: Hirtomurex winckworthi (H.C. Fulton, 1930) - (MURICIDAE)
- winckworthi, Macrochlaena winckworthi (G.C. Robson, 1926) - (OCTOPODIDAE)
- winckworthi, Tropidophora winckworthi E. Fischer-Piette, 1949 - (POMATIIDAE)
- winckworthi, Sepia winckworthi W. Adam, 1939 - syn of: Sepia brevimana J.J.S. Steenstrup, 1875 - (SEPIIDAE)
- winckworthi, Solemya winckworthi B. Prashad, 1932 - (SOLEMYIDAE)
- winckworthi, Wareniconcha winckworthi (B. Prashad, 1932) - (VESICOMYIDAE)
- winckworthi, Vesicomya winckworthi B. Prashad, 1932 - syn of: Wareniconcha winckworthi (B. Prashad, 1932) - (VESICOMYIDAE)
- Winckworthia, syn of: Genus Limaria J.H.F. Link, 1807 (LIMIDAE)
- windhauseni, Choicensisphinctes windhauseni (C.S. Weaver, 1931 †) - (ATAXIOCERATIDAE) (FOSSIL)
- Windhauseniceras, Genus Windhauseniceras Leanza, 1945 (HIMALAYITIDAE) (FOSSIL)
- windmorense, Rayonnoceras windmorense J.S. Turner, 1951 † - (CARBACTINOCERATIDAE) (FOSSIL)
- windoesi, Trigonia windoesi Lycett, 1883 † - (TRIGONIIDAE) (FOSSIL)
- windowblindensis, Worthenia windowblindensis Batten & A. Stokes, 1986 † - (LOPHOSPIRIDAE) (FOSSIL)
- winensis, Macrochilina winensis Dickins, 1963 † - (SOLENISCIDAE) (FOSSIL)
- winfriedi, Odostomia winfriedi A. Peñas & E. Rolán, 1999 - (PYRAMIDELLIDAE)
- winfriedi, Megastomia winfriedi A. Peñas & E. Rolán, 1999 - (PYRAMIDELLIDAE)
- Wingeastonia, Genus Wingeastonia K. Martin, 1906 (PACHYCHILIDAE) (FOSSIL)
- Wingenella, syn of: Subgenus Pyramidella (Longchaeus) O.A.L. Mφrch, 1875 (PYRAMIDELLIDAE)
- wingi, Morrowites wingi (C.C. Morrow, 1935 †) - (ACANTHOCERATIDAE) (FOSSIL)
- winifredae, Chicoreus winifredae E.H. Vokes, 1995 † - (MURICIDAE) (FOSSIL)
- winifredae, Simnia winifredae Gibson-Smith, 1974 † - (OVULIDAE) (FOSSIL)
- winkleri, Toxoceras winkleri Rodighiero, 1919 † - (ANCYLOCERATIDAE) (FOSSIL)
- winkleri, Promathildia winkleri E.A.L. Kittl, 1894 † - (GORDENELLIDAE) (FOSSIL)
- winkleri, Cataschisma winkleri E.F.R.K. Koken & J. Perner, 1925 † - (GOSSELETINIDAE) (FOSSIL)
- winkleri, Goniochilus winkleri Sauerzopf, 1952 † - (HYDROBIIDAE) (FOSSIL)
- winkleri, Rissoa winkleri Müller, 1851 † - (RISSOIDAE) (FOSSIL)
- winkleri, Melanoides winkleri (C. Mayer, 1861 †) - (THIARIDAE) (FOSSIL)
- winkleri, Usedomella winkleri Grundel, 1999 † - (TOFANELLIDAE) (FOSSIL)
- Winkleriteuthis, Genus Winkleriteuthis Fuchs, Heyng & Keupp, 2013 (BELEMNITIDA (UNASSIGNED)) (FOSSIL)
- winkleyi, Amnicola winkleyi H.A. Pilsbry, 1912 - syn of: Cincinnatia winkleyi (H.A. Pilsbry, 1912) - (AMNICOLIDAE)
- winkleyi, Ampullaria winkleyi H.A. Pilsbry, 1901 - (AMPULLARIIDAE)
- winkleyi, Cincinnatia winkleyi (H.A. Pilsbry, 1912) - (HYDROBIIDAE)
- winkleyi, Odostomia winkleyi P. Bartsch, 1909 - syn of: Sayella fusca (Adams, 1839) - (PYRAMIDELLIDAE)
- winkleyi, Musculium winkleyi V. Sterki, 1909 - syn of: Musculium lacustre (O.F. Müller, 1774) - (SPHAERIIDAE)
- winkleyi mozleyi, Cincinnatia winkleyi mozleyi B. Walker, 1925 - (HYDROBIIDAE)
- winneba, Aplysia winneba N.B. Eales, 1957 - (APLYSIIDAE)
- winnebagoensis, Valvata winnebagoensis H.B. Baker, 1928 - (VALVATIDAE)
- winneckeana, Semotrachia winneckeana (R. Tate, 1894) - (CAMAENIDAE)
- winneguthi, Albinaria scopulosa winneguthi (A.J. Wagner, 1914) - (CLAUSILIIDAE)
- winneguthi, Napaeopsis merditanus winneguthi (R. Sturany, 1907) - (ENIDAE)
- winnemae, Proarcestes winnemae Smith, 1927 † - (ARCESTIDAE) (FOSSIL)
- winnerae, Melongena corona winnerae E.J. Petuch, 2004 - (MELONGENIDAE)
- winniei, Partulina winniei D.D. Baldwin, 1908 - (ACHATINELLIDAE)
- winnipegense, Whiteavesites winnipegense (J.J.F. Whiteaves, 1892 †) - (CLINOCERATIDAE) (FOSSIL)
- winnipegense, Loxonema winnipegense J.J.F. Whiteaves, 1893 † - (LOXONEMATIDAE) (FOSSIL)
- winnipegensis, Hormotoma winnipegensis J.J.F. Whiteaves, 1897 † - (MURCHISONIIDAE) (FOSSIL)
- winnipegensis, Physella winnipegensis E. Pip, 2004 - (PHYSIDAE)
- Winnipegoceras, Genus Winnipegoceras Foerste, 1928 (WESTONOCERATIDAE) (FOSSIL)
- winnipegosis, Euomphalus winnipegosis E.G. Linsley & E.L. Yochelson, 1973 † - syn of: Pseudomphalotrochus winnipegosis (E.G. Linsley & E.L. Yochelson, 1973 †) - (EUOMPHALIDAE) (FOSSIL)
- winnipegosis, Pseudomphalotrochus winnipegosis (E.G. Linsley & E.L. Yochelson, 1973 †) - (OMPHALOTROCHIDAE) (FOSSIL)
- winonicum, Ellesmeroceras winonicum (Sardeson, 1896 †) - (ELLESMEROCERATIDAE) (FOSSIL)
- winslowae, Arene winslowae H.A. Pilsbry & H.N. Lowe, 1932 - (ARENEIDAE)
- winslowae, Cingula winslowae (P. Bartsch, 1928) - (RISSOIDAE)
- winslowi, Nautilus winslowi F.B. Meek & A.H. Worthen, 1873 † - (NAUTILIDAE) (FOSSIL)
- Winslowoceras, Genus Winslowoceras Miller & Downs, 1948 (WELLERITIDAE) (FOSSIL)
- winsnesi, Streblochondria winsnesi Nakazawa, 1999 † - (STREBLOCHONDRIIDAE) (FOSSIL)
- winstoni, Actinoceras winstoni Flower, 1957 † - (ACTINOCERATIDAE) (FOSSIL)
- Winstonoceras, Genus Winstonoceras Flower, 1984 (ENDOCERIDA (UNASSIGNED)) (FOSSIL)
- wintei, Liguus fasciatus wintei R.H. Humes, 1952 - (ORTHALICIDAE)
- Winterbergiella, Genus Winterbergiella Blodgett & Frύda, 1999 (GOSSELETINIDAE) (FOSSIL)
- winteri, Amphidromus winteri (L. Pfeiffer, 1849) - (CAMAENIDAE)
- winteri, Fusus winteri R.W. Dunker, 1847 - syn of: Orania ficula (L.A. Reeve, 1848) - (FASCIOLARIIDAE)
- winteri, Thiara winteri G. von dem Busch, 1842 - (THIARIDAE)
- winteri, Turbo winteri R.A. Philippi, 1846 - syn of: Marmarostoma argyrostomus (C. Linnaeus, 1758) - (TURBINIDAE)
- winteriana, Landouria winteriana (L. Pfeiffer, 1841) - (CAMAENIDAE)
- winteriana, Neosiliqua winteriana (R.W. Dunker, 1853) - (PHARIDAE)
- winteriana crassiuscula, Landouria winteriana crassiuscula G.A. Solem - (CAMAENIDAE)
- winthropi, Penion winthropi J. Marwick, 1965 † - (BUCCINIDAE) (FOSSIL)
- wintlei, Drymaeus wintlei J. Finch, 1929 - (BULIMULIDAE)
- wintlei, Friginatica wintlei (J.E. Tenison-Woods, 1876 †) - (NATICIDAE) (FOSSIL)
- wintoni, Pseudacanthoceras wintoni Adkins, 1928 † - (ACANTHOCERATIDAE) (FOSSIL)
- wintoni, Angolaites wintoni (Adkins, 1920 †) - (BRANCOCERATIDAE) (FOSSIL)
- Wintonia, Subgenus Mariella (Wintonia) Adkins, 1920 (TURRILITIDAE) (FOSSIL)
- wintunium, Hoplocrioceras wintunium F.M. Anderson, 1938 † - (ACRIOCERATIDAE) (FOSSIL)
- winwoodii, Trapezium winwoodii Moore † - (TRAPEZIDAE) (FOSSIL)
- wira, Pucamya wira T.M. Sánchez, 2007 † - (PUCAMYIDAE) (FOSSIL)
- wireni, Falcidens wireni (H.F. Nierstrasz, 1902) - (CHAETODERMATIDAE)
- Wirenia, Genus Wirenia N.H. Odhner, 1921 (GYMNOMENIIDAE)
- WIRENIIDAE - syn of Family: GYMNOMENIIDAE
- wirthi, Carpathica wirthi L. Forcart, 1971 - (OXYCHILIDAE)
- wirtzi, Pleurobranchus wirtzi J.A. Ortea, L. Moro & G.M. Caballer, 2014 - (PLEUROBRANCHIDAE)
- wisbeyensis, Pleurorima wisbeyensis (Lindström, 1884 †) - (GOSSELETINIDAE) (FOSSIL)
- wisbeyensis, Pleurotomaria wisbeyensis Lindström, 1884 † - syn of: Pleurorima wisbeyensis (Lindström, 1884 †) - (PLEUROTOMARIIDAE) (FOSSIL)
- wisbyense, Oriostoma wisbyense Lindström, 1884 † - (ORIOSTOMATIDAE) (FOSSIL)
- wisbyensis, Boucotspira wisbyensis (Lindström, 1884 †) - (HELICOTOMIDAE) (FOSSIL)
- wisbyensis, Trochus wisbyensis Lindström, 1884 † - syn of: Boucotspira wisbyensis (Lindström, 1884 †) - (TROCHIDAE) (FOSSIL)
- Wisconsinella, Genus Wisconsinella Blodgett , 1988 (GOSSELETINIDAE) (FOSSIL)
- wisconsinense, Platyceras wisconsinense Ulrich & Scofield, 1897 † - syn of: Helcionopsis wisconsinensis Ulrich & Scofield, 1897 † - (PLATYCERATIDAE) (FOSSIL)
- wisconsinensis, Eunema wisconsinensis Ulrich & Scofield, 1897 † - syn of: Eunema helicteres Salter, 1859 † - (LOPHOSPIRIDAE) (FOSSIL)
- wisconsinensis, Tetranota wisconsinensis (R.P. Whitfield, 1878 †) - (PLECTONOTIDAE) (FOSSIL)
- wisconsinensis, Helcionopsis wisconsinensis Ulrich & Scofield, 1897 † - (TRYBLIDIIDAE) (FOSSIL)
- wiseae, Beddomeia wiseae W.F. Ponder & K.B. Clark, 1993 - (HYDROBIIDAE)
- wisei, Ceratopea wisei Fix, 1975 † - (RAPHISTOMATIDAE) (FOSSIL)
- wisemani, Vexillum pacificum wisemani (W.L.H. Dohrn, 1860) - (COSTELLARIIDAE)
- wisemani, Phasianella wisemani W. Baird, 1873 - (PHASIANELLIDAE)
- wisemani, Cymbiola pulchra wisemani (J.W. Brazier, 1870) - (VOLUTIDAE)
- wisemani randalli, Cymbiola pulchra wisemani randalli A. Stokes, 1961 - (VOLUTIDAE)
- wiseri, Calliostoma wiseri P. Calcara, 1842 - syn of: Putzeysia wiseri (P. Calcara, 1842) - (CALLIOSTOMATIDAE)
- wiseri, Putzeysia wiseri (P. Calcara, 1842) - (CALLIOTROPIDAE)
- wiseri, Danilia wiseri P. Calcara, 1842 - syn of: Putzeysia wiseri (P. Calcara, 1842) - (CHILODONTIDAE)
- wiseri, Trochus wiseri P. Calcara, 1842 - syn of: Putzeysia wiseri (P. Calcara, 1842) - (TROCHIDAE)
- wisewoodae, Simnia wisewoodae C.J. Maury, 1917 † - (OVULIDAE) (FOSSIL)
- wishkahensis, Glycymeris wishkahensis Clark, 1925 † - syn of: Glycymeris slodkewitschi V.N. Sinelnikova, 1984 † - (GLYCYMERIDIDAE) (FOSSIL)
- Wisonsinella, Genus Wisonsinella (ARCHAEOGASTROPODA (UNASSIGNED)) (FOSSIL)
- Wissenbachia, Genus Wissenbachia Foerste, 1926 (BREVICOCERATIDAE) (FOSSIL)
- wissmanni, Goniatites wissmanni Münster, 1841 † - (GONIATITIDAE) (FOSSIL)
- wissmanni, Chambardia wissmanni (E.C. Von Martens, 1883) - (IRIDINIDAE)
- wissmanni, Avicula wissmanni Münster, 1841 † - (PTERIIDAE) (FOSSIL)
- wissneri, Ambites wissneri Tozer, 1994 † - (GYRONITIDAE) (FOSSIL)
- wistaria, Conus wistaria T. Shikama, 1970 - syn of: Pionoconus fulmen (L.A. Reeve, 1843) - (CONIDAE)
- wistarmorrisi, Mutela wistarmorrisi D.L. Graf & K.S. Cummings, 2006 - (IRIDINIDAE)
- wiswellense, Paradimorphoceras wiswellense (Moore, 1939 †) - (DIMORPHOCERATIDAE) (FOSSIL)
- witchelli, Globularia witchelli Cox & Arkell † - (AMPULLINIDAE) (FOSSIL)
- witchelli, Cylindrobullina witchelli L.R. Cox & W.J. Arkell † - (CYLINDROBULLINIDAE) (FOSSIL)
- witchelli, Rissoina witchelli J. Lycett, 1863 † - (RISSOINIDAE) (FOSSIL)
- Witchellia, Genus Witchellia Imlay, 1964 (HAMMATOCERATIDAE) (FOSSIL)
- withami, Crassina withami J. Smith, 1839 - syn of: Astarte borealis (H.C.F. Schumacher, 1817) - (ASTARTIDAE)
- withlacoochensis, Venericardia withlacoochensis H.G. Richards, 1953 † - (CARDITIDAE) (FOSSIL)
- withlacoochensis, Astraea withlacoochensis K.V.W. Palmer, 1953 † - (TURBINIDAE) (FOSSIL)
- withnalli, Eucochlis withnalli Cook & A. Nützel, 2005 † - (EUCOCHLIDAE) (FOSSIL)
- withrowi, Trigonaphera withrowi R.E. Petit, 1976 - syn of: Trigonostoma scala (J.F. Gmelin, 1791) - (CANCELLARIIDAE)
- withrowi, Scalptia withrowi R.E. Petit, 1976 - syn of: Trigonostoma scala (J.F. Gmelin, 1791) - (CANCELLARIIDAE)
- withrowi, Muricopsis withrowi E.H. Vokes & R. Houart, 1986 - (MURICIDAE)
- withrowi, Metatirolites withrowi Tozer, 1994 † - (USSURITIDAE) (FOSSIL)
- witjazi, Pteroctopus witjazi I.I. Akimushkin, 1963 - (OCTOPODIDAE)
- witryana, Bucania witryana de Koninck, 1883 † - (BUCANIIDAE) (FOSSIL)
- wittei, Crassiatractites wittei (Mojsisovics, 1871 †) - (AULACOCERIDA (UNASSIGNED)) (FOSSIL)
- wittekindi, Menuites wittekindi (F. Schlüter, 1876 †) - (PACHYDISCIDAE) (FOSSIL)
- wittenburgi, Proarcestes wittenburgi Shevyrev, 1995 † - (ARCESTIDAE) (FOSSIL)
- wittichi, Thais wittichi L.G. Hertlein, 1927 † - (MURICIDAE) (FOSSIL)
- wittichi, Turritella wittichi L.G. Hertlein, 1927 † - (TURRITELLIDAE) (FOSSIL)
- wittigi, Graphiconus wittigi (J.G. Walls, 1977) - (CONIDAE)
- wittmanni, Helix wittmanni Zawadzky - syn of: Arianta arbustorum (C. Linnaeus, 1758) - (HELICIDAE)
- wittmanni, Ferrissia wittmanni W.R. Schlickum, 1964 † - (PLANORBIDAE) (FOSSIL)
- Wiwaxia, Genus Wiwaxia Mathew, 1899 (WIWAXIIDAE) (FOSSIL)
- WIWAXIIDAE Conway Morris & Caron, 2007 - Family (DIPLACOPHORA-SACHITIDA [Order]) (FOSSIL)
- Wladislawia, Subgenus Campylaea (Wladislawia) A. Wagner, 1927 (HELICIDAE)
- wocklumensis, Finiclymenia wocklumensis (C.N. Lange, 1929 †) - (GONIOCLYMENIIDAE) (FOSSIL)
- wocklumeri, Lissoclymenia wocklumeri (Wedekind, 1914 †) - (KOSMOCLYMENIIDAE) (FOSSIL)
- Wocklumeria, Genus Wocklumeria Wedekind , 1918 (WOCKLUMERIIDAE) (FOSSIL)
- WOCKLUMERIIDAE Schindewolf, 1937 - Family (CEPHALOPODA-AMMONOIDEA [Subclass]-CLYMENIIDA [Order]-WOCKLUMERIOIDEA [Superfamily]) (FOSSIL)
- wocklumerioides, Proshumardites wocklumerioides (Rauser-Tschernoussowa 1928 †) - (AGATHICERATIDAE) (FOSSIL)
- wodani, Tropites wodani Mojsisovics, 1893 † - (TROPITIDAE) (FOSSIL)
- woeckeneri, Paracrioceras woeckeneri (A. von Koenen, 1902 †) - (ANCYLOCERATIDAE) (FOSSIL)
- woeckeneri, Crioceras woeckeneri A. von Koenen, 1902 † - syn of: Paracrioceras woeckeneri (A. von Koenen, 1902 †) - (CRIOCERATITIDAE) (FOSSIL)
- woehrmanni, Platychilina woehrmanni E.F.R.K. Koken, 1892 † - syn of: Platychilina pustulosa (Münster, 1841 †) - (DELPHINULOPSIDAE) (FOSSIL)
- woehrmanni, Gruenewaldia woehrmanni (Bittner, 1895 †) - (MYOPHORIIDAE) (FOSSIL)
- woehrmanni, Heminajas woehrmanni L. Waagen, 1907 † - (TRIGONODIDAE) (FOSSIL)
- Woehrmannia, Subgenus Euomphalus (Woehrmannia) Bφhm, 1895 (EUOMPHALIDAE) (FOSSIL)
- wohlberedti, Montenegrina subcristata wohlberedti O.F. von Möllendorff - (CLAUSILIIDAE)
- wohlberedti, Helix wohlberedti W. Kobelt, 1905 - syn of: Chilostoma pouzolzi montenegrina (E.A. Rossmässler, 1836) - (HELICIDAE)
- wohlberedti, Limax wohlberedti H.R. Simroth, 1900 - (LIMACIDAE)
- wohlersi, Megalobulimus wohlersi F. Lange de Morretes, 1952 - (MEGALOBULIMIDAE)
- wohltmanni, Mesocallista wohltmanni (v. Koenen 1897) † - (CARDIIDA (UNASSIGNED)) (FOSSIL)
- wohltmanni, Hoplitoides wohltmanni (A. von Koenen, 1897 †) - (COILOPOCERATIDAE) (FOSSIL)
- wohltmanni, Hoplites wohltmanni A. von Koenen, 1897 † - (HOPLITIDAE) (FOSSIL)
- wohrmani, Palaeomutela wohrmani Netschajew, 1894 † - (PALAEOMUTELIDAE) (FOSSIL)
- woldemarii, Vexillum woldemarii (L.C. Kiener, 1838) - (COSTELLARIIDAE)
- wolfae, Pupilla wolfae Y. Tzvetkov, 1940 - syn of: Pupilla sterri (I. von Voith in F. Forster, 1840) - (PUPILLIDAE)
- Wolfataria, syn of: Genus Pinctada P.F. Rφding, 1798 (PTERIIDAE)
- wolfcampensis, Omphalotrochus wolfcampensis E.L. Yochelson, 1956 † - (OMPHALOTROCHIDAE) (FOSSIL)
- wolfei, Bursa latitudo wolfei T.A. Garrard, 1961 - (BURSIDAE)
- wolfei, Vexillum wolfei W.O. Cernohorsky, 1978 - (COSTELLARIIDAE)
- wolfei, Drillia wolfei D.L. Tippett, 1995 - (DRILLIIDAE)
- wolffi, Sandbergeria wolffi F. Kautsky, 1925 † - (DIASTOMATIDAE) (FOSSIL)
- wolffi, Laevityphis wolffi R. Houart, 2013 - (MURICIDAE)
- wolffi, Nassarius wolffi (J. Knudsen, 1956) - (NASSARIIDAE)
- wolffi, Nassa wolffi J. Knudsen, 1956 - syn of: Nassarius wolffi (J. Knudsen, 1956) - (NASSARIIDAE)
- wolffi, Nuculana wolffi (Nicklès, 1955) - (NUCULANIDAE)
- wolffi, Jupiteria wolffi R.K. Dell, 1956 - (NUCULANIDAE)
- wolffi, Trenchia wolffi J. Knudsen, 1964 - (SEGUENZIOIDEA (UNASSIGNED))
- wolffi, Xylophaga wolffi J. Knudsen, 1961 - syn of: Xylophaga grevei J. Knudsen, 1961 - (XYLOPHAGAIDAE)
- wolfgangfischeri, Melanopsis wolfgangfischeri T.A. Neubauer, M. Harzhauser & al., 2014 † - (MELANOPSIDAE) (FOSSIL)
- wolfgangi, Strioterebrum wolfgangi F. Toula, 1909 † - (TEREBRIDAE) (FOSSIL)
- Wolfgangia, Subgenus Fonscochlea (Wolfgangia) W.F. Ponder, R. Hershler & B.W. Jenkins, 1989 (HYDROBIIDAE)
- wolfi, Naesiotus wolfi (P.H. Reibisch, 1892) - (BULIMULIDAE)
- wolfi, Detracia wolfi (K. Miller, 1879) - (ELLOBIIDAE)
- wolfi, Nesonanina wolfi C.R. Böttger, 1918 - (HELICARIONIDAE)
- wolfi, Arganiella wolfi (P. Glöer & H.D. Boeters, 2007) - (HYDROBIIDAE)
- wolfi, Boetersiella wolfi P. Glöer & H.D. Boeters, 2007 - syn of: Arganiella wolfi (P. Glöer & H.D. Boeters, 2007) - (HYDROBIIDAE)
- wolfi, Octopus wolfi (G. Wülker, 1913) - (OCTOPODIDAE)
- wolfi, Lamelliconcha wolfi A.A. Olsson, 1931 † - (VENERIDAE) (FOSSIL)
- wolfi, Viviparus wolfi M. von Neumayr in M. von Neumayr & C.R.C. Paul, 1875 † - (VIVIPARIDAE) (FOSSIL)
- wolfii, Gastrocopta wolfii (K. Miller, 1879) - (GASTROCOPTIDAE)
- wolfischeri, Iglica wolfischeri A. Reischütz & P.L. Reischütz, 2004 - (HYDROBIIDAE)
- wolkbergensis, Sheldonia wolkbergensis Herbert, 2016 - (UROCYCLIDAE)
- wollastoni, Conolithes wollastoni (P.A. Maxwell, 1978 †) - (CONIDAE) (FOSSIL)
- wollastoni, Ferussacia wollastoni R.B. Watson, 1877 - syn of: Ferussacia folliculus (J.S. Schröter, 1784) - (FERUSSACIIDAE)
- wollastoni, Leptaxis wollastoni R.T. Lowe, 1852 - (HYGROMIIDAE)
- wollastoni, Leiostyla wollastoni (C.de Paiva, 1866) - (LAURIIDAE)
- wollastoni, Leiostyla wollastoni R.T. Lowe, 1867 - syn of: Leiostyla loweana T.V. Wollaston, 1878 - (LAURIIDAE)
- wollastoni, Globisinum wollastoni H.J. Finlay, 1927 - syn of: Globisinum drewi (R. Murdoch, 1899) - (NATICIDAE)
- wollastoni, Ostrea wollastoni Finlay, 1927 † - (OSTREIDAE) (FOSSIL)
- wollastoni, Sectipecten wollastoni (Finlay, 1927 †) - (PECTINIDAE) (FOSSIL)
- wollastoni, Quickia wollastoni (W.L.H. Dohrn, 1869) - (SUCCINEIDAE)
- wollastoni forensis, Leptaxis wollastoni forensis T.V. Wollaston, 1878 - (HYGROMIIDAE)
- wollastoniana, Fadyenia wollastoniana E. Chitty, 1857 - (HELICINIDAE)
- wollastonii, Cuspidaria wollastonii (E.A. Smith, 1885) - (CUSPIDARIIDAE)
- Wollastonula, Subgenus Leiostyla (Wollastonula) H.A. Pilsbry, 1922 (LAURIIDAE)
- Wollemanniceras, Subgenus Callizoniceras (Wollemanniceras) Imlay, 1960 (DESMOCERATIDAE) (FOSSIL)
- wollumbi, Colpospira wollumbi T.A. Garrard, 1972 - (TURRITELLIDAE)
- wolterecki, Tylomelania wolterecki T. von Rintelen, P. Bouchet & M. Glaubrecht, 2007 - (PACHYCHILIDAE)
- wolteri, Vertigo wolteri I. Kilias, 1969 - syn of: Vertigo angustior J.G. Jeffreys, 1830 - (VERTIGINIDAE)
- wolterstorffi, Limax wolterstorffi H.R. Simroth, 1900 - (LIMACIDAE)
- wolungense, Manchuroceras wolungense T. Kobayashi, 1931 † - syn of: Piloceras wolungense (T. Kobayashi, 1931 †) - (MANCHUROCERATIDAE) (FOSSIL)
- wolungense, Piloceras wolungense (T. Kobayashi, 1931 †) - (PILOCERATIDAE) (FOSSIL)
- Wolungoceras, Genus Wolungoceras Kobayashi, 1931 (SACTORTHOCERATIDAE) (FOSSIL)
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