- Wopfingites, Genus Wopfingites Wiedmann , 1970 † (USSURITIDAE) (FOSSIL)
- worcesteri, Cochlostyla worcesteri P. Bartsch, 1910 - syn of: Hypselostyla velata worcesteri P. Bartsch, 1909 - (BRADYBAENIDAE)
- worcesteri, Hypselostyla velata worcesteri P. Bartsch, 1909 - (BRADYBAENIDAE)
- worcesteri, Conus worcesteri J.W. Brazier, 1891 - syn of: Pionoconus magus (C. Linnaeus, 1758) - (CONIDAE)
- worcesteri, Geophorus worcesteri P. Bartsch, 1918 - (HELICINIDAE)
- wordeni, Anadara wordeni W.P. Woodring, 1925 † - (ARCIDAE) (FOSSIL)
- wordeni, Cymbophora wordeni Gardner, 1916 † - (MACTRIDAE) (FOSSIL)
- wordensis, Manzanospira wordensis Batten, 1989 † - (LOPHOSPIRIDAE) (FOSSIL)
- wordensis, Hesperiella wordensis Batten, 1989 † - (PORCELLIIDAE) (FOSSIL)
- wordiei, Wordieoceras wordiei (Spath, 1930 †) - (OPHICERATIDAE) (FOSSIL)
- Wordieoceras, Genus Wordieoceras Tozer , 1971 † (OPHICERATIDAE) (FOSSIL)
- worki, Conus worki E.J. Petuch, 1998 - syn of: Dauciconus daucus riosi (E.J. Petuch, 1986) - (CONIDAE)
- worki, Dimorphoceras worki W. Korn & Titus, 2011 † - (DIMORPHOCERATIDAE) (FOSSIL)
- worki, Sclerodoris worki (Er. Marcus & Ev. Marcus, 1967) - (DISCODORIDIDAE)
- worki, Neogoniatites worki W. Korn & Ebbighausen, 2006 † - (GONIATITIDAE) (FOSSIL)
- worki, Strombus pugilis worki E.J. Petuch, 1993 - (STROMBIDAE)
- worki, Scaphella robusta worki J. Coltro, 1998 - (VOLUTIDAE)
- worleyi, Pseudegestula worleyi (A.W.B. Powell, 1928) - (CHAROPIDAE)
- worleyi, Charopa worleyi A.W.B. Powell, 1928 - syn of: Pseudegestula worleyi (A.W.B. Powell, 1928) - (CHAROPIDAE)
- wormaldi, Dentimargo wormaldi (A.W.B. Powell, 1971) - (MARGINELLIDAE)
- wormaldi, Babelomurex wormaldi (A.W.B. Powell, 1971) - (MURICIDAE)
- wormaldi, Latiaxis wormaldi A.W.B. Powell, 1971 - syn of: Babelomurex wormaldi (A.W.B. Powell, 1971) - (MURICIDAE)
- wormaldi, Coluzea wormaldi (A.W.B. Powell, 1971) - (TURBINELLIDAE)
- worsfoldi, Acanthochitona worsfoldi W.G. Lyons, 1988 - (ACANTHOCHITONIDAE)
- worsfoldi, Heliacus worsfoldi (J.F. Quinn, 1981) - (ARCHITECTONICIDAE)
- worsfoldi, Teretropoma worsfoldi J.F. Quinn, 1981 - syn of: Heliacus worsfoldi (J.F. Quinn, 1981) - (ARCHITECTONICIDAE)
- worsfoldi, Epitonium worsfoldi R. Robertson, 1994 - (EPITONIIDAE)
- worsfoldi, Nanobalcis worsfoldi A. Warén, 1990 - (EULIMIDAE)
- worsfoldi, Dermomurex worsfoldi E.H. Vokes, 1992 - (MURICIDAE)
- worsfoldi, Macromphalina worsfoldi E. Rolán & F. Rubio, 1998 - (VANIKORIDAE)
- wortheni, Vanuxemia wortheni Ulrich, 1894 † - (CYRTODONTIDAE) (FOSSIL)
- wortheni, Naticopsis wortheni Knight, 1933 † - syn of: Naticopsis wortheniana Knight, 1934 † - (DELPHINULOPSIDAE) (FOSSIL)
- wortheni, Taosia wortheni Knight 1942 † - (GONIASMATIDAE) (FOSSIL)
- wortheni, Dictyotomaria wortheni (Weller, 1916 †) - (GOSSELETINIDAE) (FOSSIL)
- wortheni, Domatoceras wortheni Tucker, 1976 † - (GRYPOCERATIDAE) (FOSSIL)
- wortheni, Loxonema wortheni Weller, 1916 † - syn of: Palaeozygopleura wortheni (Weller, 1916 †) - (LOXONEMATIDAE) (FOSSIL)
- wortheni, Phestia wortheni Hoare & al., 1989 † - (NUCULANIDAE) (FOSSIL)
- wortheni, Palaeozygopleura wortheni (Weller, 1916 †) - (PALAEOZYGOPLEURIDAE) (FOSSIL)
- wortheni, Phanerotrema wortheni J.W. Hall, 1856 † - syn of: Rhineoderma wortheni (J.W. Hall, 1856 †) - (PHANEROTREMATIDAE) (FOSSIL)
- wortheni, Phragmoceras wortheni Foerste, 1929 † - (PHRAGMOCERATIDAE) (FOSSIL)
- wortheni, Strophostylus wortheni Weller, 1916 † - (PLATYCERATIDAE) (FOSSIL)
- wortheni, Rhineoderma wortheni (J.W. Hall, 1856 †) - (PLATYCERATIDAE) (FOSSIL)
- wortheni, Platyostoma wortheni T.A. Conrad 1842 † - (PLATYCERATIDAE) (FOSSIL)
- wortheni, Pleurotomaria wortheni J.W. Hall, 1856 † - syn of: Rhineoderma wortheni (J.W. Hall, 1856 †) - (PLEUROTOMARIIDAE) (FOSSIL)
- wortheni, Ptychomphalus wortheni Weller, 1916 † - syn of: Dictyotomaria wortheni (Weller, 1916 †) - (PTYCHOMPHALIDAE) (FOSSIL)
- Worthenia, Genus Worthenia de Koninck, 1883 † (LOPHOSPIRIDAE) (FOSSIL)
- wortheniaeformis, Chartronella wortheniaeformis (Cox, 1949 †) - (PARATURBINIDAE) (FOSSIL)
- wortheniaeformis, Chartroniella wortheniaeformis Cox, 1949 † - syn of: Chartronella wortheniaeformis (Cox, 1949 †) - (PARATURBINIDAE) (FOSSIL)
- wortheniana, Naticopsis wortheniana Knight, 1934 † - (DELPHINULOPSIDAE) (FOSSIL)
- Wortheniella, Genus Wortheniella Schwardt, 1992 † (WORTHENIELLIDAE) (FOSSIL)
- WORTHENIELLIDAE Bandel, 2009 † - Family (GASTROPODA-ARCHAEOGASTROPODA) (FOSSIL)
- wortheniiformis, Chartroniella wortheniiformis Cox, 1949 † - syn of: Chartronella wortheniaeformis (Cox, 1949 †) - (PARATURBINIDAE) (FOSSIL)
- Wortheniopsis, Genus Wortheniopsis Böhm, 1895 † (PLETHOSPIRIDAE) (FOSSIL)
- Worthenoceras, Genus Worthenoceras Foerste, 1930 † (ACLEISTOCERATIDAE) (FOSSIL)
- Worthenopsis, syn of: Genus Wortheniopsis Böhm, 1895 † (PLETHOSPIRIDAE) (FOSSIL)
- worthense, Mortoniceras worthense Adkins, 1920 † - syn of: Cantabrigites spinosum (Pervinquière, 1907 †) - (BRANCOCERATIDAE) (FOSSIL)
- worthense, Worthoceras worthense (Adkins, 1920 †) - (SCAPHITIDAE) (FOSSIL)
- worthensis, Turritella worthensis Adkins, 1920 † - syn of: Turritella ventrivoluta (Cragin, 1893 †) - (TURRITELLIDAE) (FOSSIL)
- worthingtoni, Cucullaea worthingtoni F.W. Hutton, 1873 † - (CUCULLAEIDAE) (FOSSIL)
- worthingtoni, Drillia worthingtoni E.A. Smith, 1904 - (DRILLIIDAE)
- worthingtoni, Panopea worthingtoni F.W. Hutton, 1873 † - (HIATELLIDAE) (FOSSIL)
- Worthoceras, Genus Worthoceras Adkins , 1928 † (SCAPHITIDAE) (FOSSIL)
- worthyae, Schizoglossa worthyae A.W.B. Powell, 1949 - (RHYTIDIDAE)
- worthyi, Placostylus ambagiosus worthyi A.W.B. Powell, 1947 - (BOTHRIEMBRYONTIDAE)
- worthyi, Zelandiscus worthyi F.M. Climo, 1990 - (CHAROPIDAE)
- worthyi, Allodiscus worthyi B.A. Marshall & G.M. Barker, 2008 - (CHAROPIDAE)
- wosnessenskii, Cadoceras wosnessenskii (Grewingk, 1850 †) - (CADOCERATIDAE) (FOSSIL)
- wosnessenskii, Mopalia ciliata wosnessenskii A.T. von Middendorff, 1847 - (MOPALIIDAE)
- Wothenia, syn of: Genus Worthenia de Koninck, 1883 † (LOPHOSPIRIDAE) (FOSSIL)
- wottonae, Acmaea wottonae J.M.J. Christiaens, 1975 - syn of: Lottia antillarum (G.B. I Sowerby, 1834) - (ACMAEIDAE)
- wouweri, Babylonella wouweri (F.W. Harmer, 1916 † †) - (CANCELLARIIDAE) (FOSSIL)
- woytkowskii, Leptarionta woytkowskii W.K. Weyrauch, 1960 - (XANTHONYCHIDAE)
- wrangeliae, Hermaea wrangeliae (M. Ichikawa, 1993) - (HERMAEIDAE)
- wratheri, Phygraea wratheri L.W. Stephenson, 1936 † - (GRYPHAEIDAE) (FOSSIL)
- Wrayanna, Genus Wrayanna W.J. Clench, 1948 (ASSIMINEIDAE)
- wrightae, Pollia wrightae (W.O. Cernohorsky, 1974) - (BUCCINIDAE)
- wrighti, Pseudachatina wrighti G.B. Sowerby, 1853 - (ACHATINIDAE)
- wrighti, Mexicotrochactaeon wrighti N.F. Sohl & H.A. Kollmann, 1985 † - (ACTEONELLIDAE) (FOSSIL)
- wrighti, Bellerophon wrighti Weir, 1931 † - (BELLEROPHONTIDAE) (FOSSIL)
- wrighti, Anagymnotoceras wrighti McLearn, 1946 † - (BEYRICHITIDAE) (FOSSIL)
- wrighti, Jeanneretia wrighti (J. Gundlach in L. Pfeiffer, 1865) - (CEPOLIDAE)
- wrighti, Cerion mumia wrighti C.G. Aguayo & M.I. Sánchez Roig, 1953 - (CERIONIDAE)
- wrighti, Episculites wrighti Tozer, 1994 † - (EPISCULITIDAE) (FOSSIL)
- wrighti, Japonites wrighti Tozer, 1994 † - (GYMNITIDAE) (FOSSIL)
- wrighti, Hildaites wrighti Spath, 1913 † - (HILDOCERATIDAE) (FOSSIL)
- wrighti, Pyrgulopsis wrighti C.M.F. Ancey, 1888 - syn of: Pyrgophorus coronatus (L. Pfeiffer, 1840) - (HYDROBIIDAE)
- wrighti, Wrightites wrighti Manolov, 1962 † - (LEPTOCERATOIDIDAE) (FOSSIL)
- wrighti, Ctenostreon wrighti C.É. Bayle, 1878 † - syn of: Ctenostreon rugosum (Smith, 1817 †) - (LIMIDAE) (FOSSIL)
- wrighti, Oistoceras wrighti Spath † - (LIPAROCERATIDAE) (FOSSIL)
- wrighti, Pleurolytoceras wrighti Buckman, 1905 † - (LYTOCERATIDAE) (FOSSIL)
- wrighti, Farcimen wrighti C. de la Torre & P. Bartsch, 1942 - (MEGALOMASTOMIDAE)
- wrighti, Dactyloteuthis wrighti Oppel, 1856 † - (MEGATEUTHIDIDAE) (FOSSIL)
- wrighti, Mitra wrighti J.C.H. Crosse, 1878 - syn of: Mitra inquinata L.A. Reeve, 1844 - (MITRIDAE)
- wrighti, Modiolus wrighti Warren, 1934 † - (MYTILIDAE) (FOSSIL)
- wrighti, Neilonella wrighti (C.A. Fleming, 1948) - (NEILONELLIDAE)
- wrighti, Oleacina wrighti L. Pfeiffer, 1866 - (OLEACINIDAE)
- wrighti, Neithea wrighti (Shumard, 1860 †) - (PECTINIDAE) (FOSSIL)
- wrighti, Borestus wrighti A. Thomas, 1940 † - (PHYMATOPLEURIDAE) (FOSSIL)
- wrighti, Physella wrighti G.A. Te & A.H. Clarke, 1985 - (PHYSIDAE)
- wrighti, Bulinus wrighti G. Mandahl-Barth, 1965 - (PLANORBIDAE)
- wrighti, Annularisca wrighti C. de la Torre & P. Bartsch, 1941 - (POMATIIDAE)
- wrighti, Chondropoma wrighti (L. Pfeiffer, 1862) - (POMATIIDAE)
- wrighti, Chondrothyra wrighti C. de la Torre & P. Bartsch, 1938 - (POMATIIDAE)
- wrighti, Cryptoptyxis wrighti Gerasimov, 1955 † - syn of: Exelissa quinaria (Trautschold, 1866 †) - (PROCERITHIIDAE) (FOSSIL)
- wrighti, Microptychis wrighti Longst, 1912 † - (PSEUDOZYGOPLEURIDAE) (FOSSIL)
- wrighti, Caloceras wrighti Spath, 1924 † - (PSILOCERATIDAE) (FOSSIL)
- wrighti, Ptychites wrighti McLearn, 1946 † - (PTYCHITIDAE) (FOSSIL)
- wrighti, Saghalinites wrighti Birkelund, 1965 † - (TETRAGONITIDAE) (FOSSIL)
- wrighti, Taheitia wrighti (L. Pfeiffer, 1862) - (TRUNCATELLIDAE)
- wrighti, Gongylostomella wrighti (L. Pfeiffer, 1862) - (UROCOPTIDAE)
- wrighti, Macroceramus wrighti C. de la Torre & P. Bartsch, 1972 - (UROCOPTIDAE)
- wrighti biayense, Farcimen wrighti biayense C. de la Torre & P. Bartsch, 1942 - (MEGALOMASTOMIDAE)
- wrighti bucholzi, Pseudachatina wrighti bucholzi W. Kobelt - (ACHATINIDAE)
- wrighti martianum, Farcimen wrighti martianum C. de la Torre & P. Bartsch, 1942 - (MEGALOMASTOMIDAE)
- wrighti minimus, Pyrgulopsis wrighti minimus C.M.F. Ancey, 1888 - syn of: Pyrgophorus coronatus (L. Pfeiffer, 1840) - (HYDROBIIDAE)
- wrighti minor, Pseudachatina wrighti minor T. Pain & C.R.C. Paul, 1967 - (ACHATINIDAE)
- wrighti obesus, Pyrgulopsis wrighti obesus C.M.F. Ancey, 1888 - syn of: Pyrgophorus coronatus (L. Pfeiffer, 1840) - (HYDROBIIDAE)
- wrighti oblongus, Pyrgulopsis wrighti oblongus C.M.F. Ancey, 1888 - syn of: Pyrgophorus coronatus (L. Pfeiffer, 1840) - (HYDROBIIDAE)
- wrighti plicosus, Pyrgulopsis wrighti plicosus C.M.F. Ancey, 1888 - syn of: Pyrgophorus coronatus (L. Pfeiffer, 1840) - (HYDROBIIDAE)
- wrighti transitans, Pyrgulopsis wrighti transitans C.M.F. Ancey, 1888 - syn of: Pyrgophorus coronatus (L. Pfeiffer, 1840) - (HYDROBIIDAE)
- wrightiana, Pleurolytoceras wrightiana Buckman, 1905 † - syn of: Pleurolytoceras wrighti Buckman, 1905 † - (LYTOCERATIDAE) (FOSSIL)
- wrightiana, Alasmidonta wrightiana B. Walker, 1901 - (UNIONIDAE)
- wrightiana, Pfeiffericoptis wrightiana C. de la Torre & P. Bartsch, 1972 - (UROCOPTIDAE)
- wrightianum, Rhytidopoma wrightianum (J. Gundlach in R. Arango, 1881) - (POMATIIDAE)
- wrightianum cabrasense, Rhytidopoma wrightianum cabrasense C. de la Torre & P. Bartsch, 1941 - (POMATIIDAE)
- wrightianum ottonis, Rhytidopoma wrightianum ottonis C. de la Torre & P. Bartsch, 1941 - (POMATIIDAE)
- wrightianus, Spondylus wrightianus J.C.H. Crosse, 1872 - syn of: Spondylus victoriae Sowerby, 1843 - (SPONDYLIDAE)
- wrightianus ella, Spondylus wrightianus ella T. Iredale, 1939 - syn of: Spondylus victoriae Sowerby, 1843 - (SPONDYLIDAE)
- wrightii, Harpagodes wrightii (P. Morris & J. Lycett, 1851 †) - (HARPAGODIDAE) (FOSSIL)
- wrightii, Janira wrightii Shumard, 1860 † - syn of: Neithea wrighti (Shumard, 1860 †) - (PECTINIDAE) (FOSSIL)
- wrightii, Macron wrightii H. Adams, 1865 - (PSEUDOLIVIDAE)
- wrightii, Unio wrightii I. Lea, 1865 - syn of: Nodularia douglasiae (J.E. Gray in E. Griffith & E. Pidgeon, 1834) - (UNIONIDAE)
- Wrightites, Subgenus Hamulinites (Wrightites) Manolov, 1962 † (LEPTOCERATOIDIDAE) (FOSSIL)
- Wrightoceras, Genus Wrightoceras Reyment , 1954 † (PSEUDOTISSOTIIDAE) (FOSSIL)
- wrightsvillensis, Turbonilla wrightsvillensis E.N. Powell, 1983 - (PYRAMIDELLIDAE)
- Wrightudora, Subgenus Tudora (Wrightudora) C. de la Torre & P. Bartsch, 1941 (POMATIIDAE)
- Wrigleya, Genus Wrigleya M. Glibert, 1963 (BUCCINIDAE)
- wrigleyi, Glycymeris wrigleyi Curry, 1958 † - (GLYCYMERIDIDAE) (FOSSIL)
- wrigleyi, Eotibia wrigleyi M. Glibert, 1963 † - (ROSTELLARIIDAE) (FOSSIL)
- wrobleskyi, Opalia wrobleskyi O.A.L. Mörch, 1875 - syn of: Opalia borealis (A.A. Gould, 1852) - (EPITONIIDAE)
- wroblewskyi, Architectonica wroblewskyi O.A.L. Mörch, 1875 - syn of: Architectonica nobilis P.F. Röding, 1798 - (ARCHITECTONICIDAE)
- wroblewskyi, Opalia wroblewskyi (O.A.L. Mörch, 1875) - (EPITONIIDAE)
- wroblewskyi, Epitonium wroblewskyi O.A.L. Mörch, 1875 - syn of: Opalia wroblewskyi (O.A.L. Mörch, 1875) - (EPITONIIDAE)
- wrzeesniowskii, Sultana wrzeesniowskii (W. . Lubomirski, 1880) - (ORTHALICIDAE)
- wrzeniowskii, Baicalia wrzeniowskii (W. Dybowski, 1875) - (AMNICOLIDAE)
- wrzesniowskii, Godlewskia wrzesniowskii (W. Dybowski, 1875) - (AMNICOLIDAE)
- wrzesniowskii olchonensis, Godlewskia wrzesniowskii olchonensis (Kozhov, 1936) - (AMNICOLIDAE)
- wrzesniowskii profunda, Godlewskia wrzesniowskii profunda (W.A. Lindholm, 1924) - (AMNICOLIDAE)
- wrzosoviensis, Popanites wrzosoviensis (Malinowska, 1963 †) - (OPPELIIDAE) (FOSSIL)
- wuchangensis, Clavicosta wuchangensis Liang, 1980 † - (AVICULOPECTINIDAE) (FOSSIL)
- Wuconchona, Genus Wuconchona Kang-Zaibin, 1983 (HYDROBIIDAE)
- wuelkeri, Grimpoteuthis wuelkeri (G.J. Von Grimpe, 1920) - (OPISTHOTEUTHIDAE)
- wuellerstorfi, Oospira wuellerstorfi (J. Zelebor, 1867.) - (CLAUSILIIDAE)
- wuellerstorfi, Crenostrea wuellerstorfi (C.A. von Zittel, 1864 †) - (GRYPHAEIDAE) (FOSSIL)
- wuestianum, Bythiospeum wuestianum (D. Uhl, 1938) - (HYDROBIIDAE)
- wufengensis, Erhaia wufengensis (Z. Kang, 1983) - syn of: Bythinella wufengensis (Z. Kang, 1983) - (AMNICOLIDAE)
- wufengensis, Bythinella wufengensis (Z. Kang, 1983) - (BYTHINELLIDAE)
- wuhuensis, Lophonema wuhuensis Endo, 1935 † - (HELICOTOMIDAE) (FOSSIL)
- wui, Daphnella wui C.K. Chang, 2001 - (RAPHITOMIDAE)
- wujiangensis, Latanarcestes wujiangensis Chu, 1982 † - (LATANARCESTIDAE) (FOSSIL)
- wulalam, Kimboraga wulalam F. Köhler, 2011 - (CAMAENIDAE)
- wulanwulaensis, Corbulomima wulanwulaensis Sha, 1995 † - (CORBULIDAE) (FOSSIL)
- wulanwulaensis, Lopha wulanwulaensis Sha, 1995 † - (OSTREIDAE) (FOSSIL)
- wulfeni, Nautilus wulfeni Mojsisovics, 1873 † - syn of: Enoploceras wulfeni (Mojsisovics, 1873 †) - (NAUTILIDAE) (FOSSIL)
- wulfeni, Enoploceras wulfeni (Mojsisovics, 1873 †) - (TAINOCERATIDAE) (FOSSIL)
- wulkeri, Stauroteuthis wulkeri G.J. Von Grimpe, 1920 - syn of: Grimpoteuthis wuelkeri (G.J. Von Grimpe, 1920) - (CIRROTEUTHIDAE)
- wullei, Ambigua fuscolabiata wullei (W. Kobelt, 1903) - (HELICIDAE)
- wunandarra, Globorhagada wunandarra F. Köhler, 2011 - (CAMAENIDAE)
- wunderlichi, Tornoceras wunderlichi Bockwinkel & W. Korn, 2015 † - (TORNOCERATIDAE) (FOSSIL)
- Wunderpus, Genus Wunderpus F.G. Hochberg, M.D. Norman & J. Finn, 2006 (OCTOPODIDAE)
- wunschae, Camptochlamys wunschae J. Marwick, 1953 † - (PECTINIDAE) (FOSSIL)
- wupperanum, Leptodesma wupperanum Dahmer, 1943 † - (PTERINEIDAE) (FOSSIL)
- wupperanum eifelense, Leptodesma wupperanum eifelense Dahmer, 1943 † - (PTERINEIDAE) (FOSSIL)
- wurmi, Pleurotomaria wurmi A. Römer, 1843 † - (PLEUROTOMARIIDAE) (FOSSIL)
- wurmi, Agniesella wurmi (A. Römer, 1843 †) - (PORTLOCKIELLIDAE) (FOSSIL)
- wurmii, Antirotella wurmii A. Römer, 1843 † - syn of: Antirotella helicinaeformis (von Schlotheim, 1820 †) - (ANOMPHALIDAE) (FOSSIL)
- wurmii, Manticoceras wurmii (F.A. Roemer, 1843 †) - (GEPHUROCERATIDAE) (FOSSIL)
- wurmii, Goniatites wurmii F.A. Roemer, 1843 † - syn of: Manticoceras wurmii (F.A. Roemer, 1843 †) - (GONIATITIDAE) (FOSSIL)
- wurroolgu, Globorhagada wurroolgu F. Köhler, 2011 - (CAMAENIDAE)
- wurtsbaughi, Epitonium wurtsbaughi A.M. Strong & L.G. Hertlein, 1939 - syn of: Epitonium replicatum (G.B. II Sowerby, 1844) - (EPITONIIDAE)
- wurttembergica, Oraniceras wurttembergica (Oppel †) - (PARKINSONIIDAE) (FOSSIL)
- wurttenbergeri, Ammonites wurttenbergeri Denckmann, 1887 † - syn of: Pseudolioceras boulbiense (A.T. Young & Bird, 1822 †) - (AMMONITIDA (unassigned)) (FOSSIL)
- Wustia, syn of: Genus Anisus S.E. Studer, 1820 (PLANORBIDAE)
- wutachense, Cadoceras wutachense Mitta & al., 2015 † - (CADOCERATIDAE) (FOSSIL)
- wutingi, Indothais wutingi (S.K. Tan, 1997) - (MURICIDAE)
- wutingi, Thaisella wutingi S.K. Tan, 1997 - syn of: Indothais wutingi (S.K. Tan, 1997) - (MURICIDAE)
- wutingi, Thais wutingi S.K. Tan, 1997 - syn of: Indothais wutingi (S.K. Tan, 1997) - (MURICIDAE)
- Wutinoceras, Genus Wutinoceras Shimizu & Obata, 1936 † (POLYDESMIIDAE) (FOSSIL)
- Wuxuanella, Genus Wuxuanella Cook & Pan, 2004 † (MURCHISONIIDAE) (FOSSIL)
- wuxuanensis, Crenulazone wuxuanensis Cook & Pan, 2004 † - (ARCHAEOGASTROPODA (unassigned)) (FOSSIL)
- wuxuanensis, Crenulazona wuxuanensis Cook & Pan, 2004 † - (MURCHISONIIDAE) (FOSSIL)
- Wuxuanites, Genus Wuxuanites Pojeta, Zhang Renjie & Yang Zunyi, 1986 † (PTERIIDA (unassigned)) (FOSSIL)
- wuyurru, Setobaudinia wuyurru F. Köhler, 2011 - (CAMAENIDAE)
- Wyatella, syn of: Genus Wyattella Adegoke , 1967 † (TURRITELLIDAE) (FOSSIL)
- wyattae, Sabia wyattae A.W.B. Powell, 1958 - syn of: Sabia australis (J.B.P.A. Lamarck, 1819) - (HIPPONICIDAE)
- Wyattella, Genus Wyattella Adegoke , 1967 † (TURRITELLIDAE) (FOSSIL)
- wyciski, Columella wyciski Schlickum & Strauch, 1972 † - (VERTIGINIDAE) (FOSSIL)
- wygodzinskyi, Radiodiscus wygodzinskyi W.K. Weyrauch, 1965 - (HELICODISCIDAE)
- wykoffensis, Cyrtolites wykoffensis Ulrich & Scofield, 1897 † - syn of: Cyrtospira wykoffensis (Ulrich & Scofield, 1897 †) - (CYRTOLITIDAE) (FOSSIL)
- wykoffensis, Cyrtospira wykoffensis (Ulrich & Scofield, 1897 †) - (SUBULITIDAE) (FOSSIL)
- wykoffi, Bithynia wykoffi R.A.M. Brandt, 1968 - (BITHYNIIDAE)
- wykoffi, Clea wykoffi R.A.M. Brandt, 1974 - (BUCCINIDAE)
- wykoffi, Brotia wykoffi R.A.M. Brandt, 1974 - (PACHYCHILIDAE)
- wykoffi, Stenothyra wykoffi R.A.M. Brandt, 1968 - (STENOTHYRIDAE)
- wykoffi pseudomaritima, Bithynia wykoffi pseudomaritima R.A.M. Brandt, 1968 - (BITHYNIIDAE)
- Wykoffia, Genus Wykoffia R.A.M. Brandt, 1968 (LITHOGLYPHIDAE)
- wyldi, Pierosoma wyldi (H.B. Tristram, 1861) - (PLANORBIDAE)
- wyldi salvini, Helisoma wyldi salvini S. Clessin, 1884 - syn of: Pierosoma wyldi (H.B. Tristram, 1861) - (PLANORBIDAE)
- wyleri, Vercherites wyleri Brühwiler & Bucher, 2011 † - (GALFETTITIDAE) (FOSSIL)
- wylliei, Galeodea wylliei J. Marwick, 1931 † - (CASSIDAE) (FOSSIL)
- wylliei, Cimomia wylliei R.B. Newton, 1925 † - (HERCOGLOSSIDAE) (FOSSIL)
- wymani, Anodontites patagonica wymani (I. Lea, 1860) - (MYCETOPODIDAE)
- wymanii, Diplodon wymanii (I. Lea, 1860) - (HYRIIDAE)
- wymanii, Unio wymanii I. Lea, 1860 - syn of: Diplodon wymanii (I. Lea, 1860) - (UNIONIDAE)
- wymanii apprimus, Diplodon wymanii apprimus (I. Lea, 1866) - (HYRIIDAE)
- wymanii uruguayensis, Diplodon wymanii uruguayensis I. Lea, 1860 - syn of: Diplodon wymanii (I. Lea, 1860) - (HYRIIDAE)
- wymmensis, Nuculopsis wymmensis (Keyserling, 1846 †) - (NUCULIDAE) (FOSSIL)
- wynaadense, Cyathopoma wynaadense (W.T. Blanford, 1868) - (CYCLOPHORIDAE)
- wynegungaensis, Unio wynegungaensis I. Lea, 1860 - syn of: Parreysia corrugata (O.F. Müller, 1774) - (UNIONIDAE)
- wynnei, Aviculopecten wynnei (L. Waagen, 1881 †) - (AVICULOPECTINIDAE) (FOSSIL)
- wynnei, Ceratites wynnei L. Waagen, 1895 † - (CERATITIDAE) (FOSSIL)
- wynnei, Episageceras wynnei (L. Waagen, 1880 †) - (MEDLICOTTIIDAE) (FOSSIL)
- wynnei, Nautilus wynnei L. Waagen, 1879 † - syn of: Tainionautilus wynnei (L. Waagen, 1879 †) - (NAUTILIDAE) (FOSSIL)
- wynnei, Pecten wynnei L. Waagen, 1881 † - syn of: Aviculopecten wynnei (L. Waagen, 1881 †) - (PECTINIDAE) (FOSSIL)
- wynnei, Sageceras wynnei L. Waagen, 1880 † - syn of: Episageceras wynnei (L. Waagen, 1880 †) - (SAGECERATIDAE) (FOSSIL)
- wynnei, Tainionautilus wynnei (L. Waagen, 1879 †) - (TAINOCERATIDAE) (FOSSIL)
- wynnei, Macrotheca wynnei L. Waagen, 1880 † - (TRAPEZOVITIDAE) (FOSSIL)
- wynnei, Athleta wynnei Cox, 1930 † - (VOLUTIDAE) (FOSSIL)
- wynnensis, Euphemites wynnensis Dickins, 1963 † - (EUPHEMITIDAE) (FOSSIL)
- wynnii, Bensonies wynnii (W.T. Blanford) - (ARIOPHANTIDAE)
- wynoocheensis, Cancellaria wynoocheensis C.S. Weaver, 1916 † - (CANCELLARIIDAE) (FOSSIL)
- wynyardense, Chavanicerithium wynyardense (R. Tate †) - (CERITHIIDAE) (FOSSIL)
- wynyardensis, Helix wynyardensis W.F. Petterd, 1879 - syn of: Stenacapha hamiltoni (J.C. Cox, 1868) - (HELICIDAE)
- wynyardensis, Pseudoischnochiton wynyardensis (E.A. Ashby, 1929 †) - (LEPTOCHITONIDAE) (FOSSIL)
- wynyardensis, Comitas wynyardensis (G.B. Pritchard, 1896) - (PSEUDOMELATOMIDAE)
- wyomingense, Plesiacanthoceras wyomingense (Reagan, 1924 †) - (ACANTHOCERATIDAE) (FOSSIL)
- wyomingense, Euomphaloceras wyomingense Reeside & Weymouth, 1931 † - syn of: Neogastroplites cornutus (J.J.F. Whiteaves, 1885 †) - (ACANTHOCERATIDAE) (FOSSIL)
- wyomingense, Cardioceras wyomingense Reeside, 1919 † - (CARDIOCERATIDAE) (FOSSIL)
- wyomingense, Tainoceras wyomingense Miller & A. Thomas, 1936 † - (TAINOCERATIDAE) (FOSSIL)
- wyomingensis, Pseudobaculites wyomingensis Cobban, 1952 † - (BACULITIDAE) (FOSSIL)
- wyomingensis, Prionocyclus wyomingensis F.B. Meek, 1876 † - (COLLIGNONICERATIDAE) (FOSSIL)
- wyomingensis, Fransonia wyomingensis Newell & Boyd, 1995 † - (HUNANOPECTINIDAE) (FOSSIL)
- wyomingensis, Myalina wyomingensis Lea, 1853 † - (MYALINIDAE) (FOSSIL)
- wyomingensis, Neritina wyomingensis Stanton, 1899 - (NERITIDAE)
- wyomingensis, Oxytoma wyomingensis Stanton, 1899 † - (OXYTOMIDAE) (FOSSIL)
- wyomingensis, Wilkingia wyomingensis (R.M. Branson, 1930 †) - (SANGUINOLITIDAE) (FOSSIL)
- wyomingensis, Schizodus wyomingensis Newell & Boyd, 1975 † - (SCHIZODIDAE) (FOSSIL)
- Wyomingites, Genus Wyomingites Vozin, 1972 † (DIENEROCERATIDAE) (FOSSIL)
- wysogorskii, Clymenia wysogorskii Frech, 1902 † - syn of: Trochoclymenia wysogorskii (Frech, 1902 †) - (CLYMENIIDAE) (FOSSIL)
- wysogorskii, Docidoceras wysogorskii Prinz, 1904 † - (OTOITIDAE) (FOSSIL)
- wysogorskii, Trochoclymenia wysogorskii (Frech, 1902 †) - (PLATYCLYMENIIDAE) (FOSSIL)
- wysogorskii, Mariella wysogorskii (Lasswitz, 1904 †) - (TURRILITIDAE) (FOSSIL)
- wyvillei, Echinophoria wyvillei (R.B. Watson, 1886) - (CASSIDAE)
- wyvillei oishiae, Echinophoria wyvillei oishiae (R.B. Watson, 1886) - (CASSIDAE)
- wyvillethomsoni, Punctulum wyvillethomsoni (H.B.S. Friele, 1877) - (RISSOIDAE)
- wyvillethomsoni, Alvania wyvillethomsoni (H.B.S. Friele, 1877) - syn of: Punctulum wyvillethomsoni (H.B.S. Friele, 1877) - (RISSOIDAE)
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