- exlamarcki, Dentalium exlamarcki F. Sacco, 1897 † - (DENTALIIDAE) (FOSSIL)
- Exlessia, Genus Exlessia Piette, 1860 (CAENOGASTROPODA (UNASSIGNED)) (FOSSIL)
- exlex, Elasmocentrum exlex H.A. Pilsbry, 1902 - (UROCOPTIDAE)
- exmilitare, Discopsis exmilitare E. Rolán & F. Rubio, 2002 - (TORNIDAE)
- exmouthensis, Cribrarula exmouthensis (J.C. Melvill, 1888) - (CYPRAEIDAE)
- exmouthensis, Dentalium exmouthensis K.L. Lamprell & J.M. Healy, 1998 - (DENTALIIDAE)
- exmouthensis, Ellatrivia exmouthensis (C.N. Cate, 1979) - (TRIVIIDAE)
- exmouthensis, Trivirostra exmouthensis C.N. Cate, 1979 - syn of: Ellatrivia exmouthensis (C.N. Cate, 1979) - (TRIVIIDAE)
- exmouthensis abrolhensis, Cribrarula exmouthensis abrolhensis F.Jr. Lorenz, 2002 - (CYPRAEIDAE)
- exmouthensis magnifica, Cribrarula exmouthensis magnifica F.Jr. Lorenz, 2002 - (CYPRAEIDAE)
- exmouthensis rottnestensis, Cribrarula exmouthensis rottnestensis F.Jr. Lorenz, 2002 - (CYPRAEIDAE)
- exnodosus, Strombus exnodosus F. Sacco, 1893 † - syn of: Persististrombus deperditus (Sowerby, 1840 †) - (STROMBIDAE) (FOSSIL)
- Exocardium, syn of: Genus Laevicardium W.J. Swainson, 1840 (CARDIIDAE)
- exocarpi, Badistes exocarpi J.C. Cox, 1868 - (CAMAENIDAE)
- Exochoceras, Genus Exochoceras Zhuravleva, 1972 (DISCOSORIDA (UNASSIGNED)) (FOSSIL)
- Exocholeda, Subgenus Nuculana (Exocholeda) T. Iredale, 1939 (NUCULANIDAE)
- Exochorhynchus, Genus Exochorhynchus Meek & Hayden 1864 (SANGUINOLITIDAE) (FOSSIL)
- exochum, Afrocardium exochum (J.C. Melvill, 1907) - (CARDIIDAE)
- Exoclitendoceras, Genus Exoclitendoceras Krφger & Landing, 2008 (PROTEROCAMEROCERATIDAE) (FOSSIL)
- Exocorbula, Genus Exocorbula Squires & Saul, 2004 (CORBULIDAE) (FOSSIL)
- Exocyrtoceras, Genus Exocyrtoceras Flower, 1938 (BREVICOCERATIDAE) (FOSSIL)
- exodon, Stenotrema exodon H.A. Pilsbry, 1900 - (POLYGYRIDAE)
- exodon turbinella, Stenotrema exodon turbinella (W.J. Clench & S. Archer, 1933) - (POLYGYRIDAE)
- exodonta, Stereozaptyx exodonta H.A. Pilsbry, 1909 - (CLAUSILIIDAE)
- exodonta, Nucula exodonta B. Prashad, 1932 - (NUCULIDAE)
- exogastrum, Antacaroceras exogastrum B.Z. Li, 1984 † - (ELLESMEROCERIDA (UNASSIGNED)) (FOSSIL)
- exogastrum, Huaiheceras exogastrum C. Chen & Z. Qi, 1980 † - (ELLESMEROCERIDA (UNASSIGNED)) (FOSSIL)
- exogyra, Pseudochama exogyra (T.A. Conrad, 1837) - (CHAMIDAE)
- exogyra, Chama exogyra (A. Braun in C.L.F. von Sandberger, 1863 †) - (CHAMIDAE) (FOSSIL)
- Exogyra, Genus Exogyra Say, 1820 (GRYPHAEIDAE) (FOSSIL)
- exogyroides, Volviceramus exogyroides (F.B. Meek & Hayden, 1862 †) - (INOCERAMIDAE) (FOSSIL)
- Exohaliotis, syn of: Genus Haliotis C. Linnaeus, 1758 (HALIOTIDAE)
- Exolaternula, Genus Exolaternula T. Habe, 1977 (LATERNULIDAE)
- exolescens, Trapezoideus exolescens (A.A. Gould, 1843) - (UNIONIDAE)
- exolescens comptus, Trapezoideus exolescens comptus (G.P. Deshayes, 1875) - (UNIONIDAE)
- exolescens pallegoixi, Trapezoideus exolescens pallegoixi (G.B. Sowerby, 1867) - (UNIONIDAE)
- exoleta, Glycymeris exoleta (C. Linnaeus, 1758) - (GLYCYMERIDIDAE)
- exoleta, Mactrellona exoleta (Garay, 1837) - (MACTRIDAE)
- exoleta, Mactra exoleta J.E. Gray, 1837 - syn of: Mactrellona exoleta (Garay, 1837) - (MACTRIDAE)
- exoleta, Pyrgulina exoleta Peñas & Rolán, 2017 - (PYRAMIDELLIDAE)
- exoleta, Tegula exoleta (T.A. Conrad, 1843 †) - (TEGULIDAE) (FOSSIL)
- exoleta, Dosinia exoleta (C. Linnaeus, 1758) - (VENERIDAE)
- Exoleta, syn of: Genus Dosinia J.A. Scopoli, 1777 (VENERIDAE)
- exoleta castanea, Dosinia exoleta castanea M.E.J. Bucquoy, P. Dautzenberg & G.F. Dollfus, 1893 - syn of: Dosinia exoleta (C. Linnaeus, 1758) - (VENERIDAE)
- exoleta gracilior, Turritella exoleta gracilior O.A.L. Mörch, 1876 - syn of: Turritella exoleta limonensis A.A. Olsson, 1922 - (TURRITELLIDAE)
- exoleta interrupta, Dosinia exoleta interrupta M.E.J. Bucquoy, P. Dautzenberg & G.F. Dollfus, 1893 - syn of: Dosinia exoleta (C. Linnaeus, 1758) - (VENERIDAE)
- exoleta limonensis, Turritella exoleta limonensis A.A. Olsson, 1922 - (TURRITELLIDAE)
- exoleta major, Dosinia exoleta major M.E.J. Bucquoy, P. Dautzenberg & G.F. Dollfus, 1893 - syn of: Dosinia exoleta (C. Linnaeus, 1758) - (VENERIDAE)
- exoleta parcipicta, Dosinia exoleta parcipicta M.E.J. Bucquoy, P. Dautzenberg & G.F. Dollfus, 1893 - syn of: Dosinia exoleta (C. Linnaeus, 1758) - (VENERIDAE)
- exoleta ponderosa, Dosinia exoleta ponderosa M.E.J. Bucquoy, P. Dautzenberg & G.F. Dollfus, 1893 - syn of: Dosinia exoleta (C. Linnaeus, 1758) - (VENERIDAE)
- exoleta radians, Dosinia exoleta radians M.E.J. Bucquoy, P. Dautzenberg & G.F. Dollfus, 1893 - syn of: Dosinia exoleta (C. Linnaeus, 1758) - (VENERIDAE)
- exoleta zonata, Dosinia exoleta zonata M.E.J. Bucquoy, P. Dautzenberg & G.F. Dollfus, 1893 - syn of: Dosinia exoleta (C. Linnaeus, 1758) - (VENERIDAE)
- Exomiliopsis, Genus Exomiliopsis (NEOGASTROPODA (UNASSIGNED)) (FOSSIL)
- exomilisca, Triphora exomilisca H.A. Rehder, 1980 - (TRIPHORIDAE)
- Exomiloceras, Genus Exomiloceras Wiedenmayer , 1979 (LYTOCERATIDAE) (FOSSIL)
- Exomilopsis, Genus Exomilopsis A. Powell, 1964 (COLUMBELLIDAE)
- exomilum, Epitonium exomilum J.C. Melvill & R. Standen, 1896 - syn of: Epitonium beachportense (B.C. Cotton & F.C. Godfrey, 1938) - (EPITONIIDAE)
- Exomilus, Genus Exomilus C. Hedley, 1918 (RAPHITOMIDAE)
- exophthalmica, Valbyteuthis exophthalmica (C. Chun, 1908) - (CHIROTEUTHIDAE)
- exopilatum, Glyphostoma exopilatum W.P. Woodring, 1928 † - (CLATHURELLIDAE) (FOSSIL)
- Exopinacites, Genus Exopinacites Chlupac & Turek, 1983 (PINACITIDAE) (FOSSIL)
- exopleura, Narona exopleura W.H. Dall, 1908 - (CANCELLARIIDAE)
- exopleura, Opalia exopleura (W.H. Dall, 1917) - (EPITONIIDAE)
- exopleura, Acirsa exopleura W.H. Dall, 1917 - syn of: Opalia exopleura (W.H. Dall, 1917) - (EPITONIIDAE)
- exoplicata, Aylacostoma exoplicata L.R.L. Simone, 2001 - (THIARIDAE)
- exoptabilis, Leptachatina exoptabilis C.M. Cooke, 1910 - (AMASTRIDAE)
- exoptanda, Amoria exoptanda (L.A. Reeve, 1849) - (VOLUTIDAE)
- exoptanda, Nipponomelon exoptanda T. Shikama, 1967 - syn of: Nipponomelon megaspira (G.B. I Sowerby, 1844) - (VOLUTIDAE)
- exoptandus, Chiton exoptandus (W.T. Bednall, 1897) - (CHITONIDAE)
- exoptandus, Rhyssoplax exoptandus W.T. Bednall, 1897 - syn of: Chiton exoptandus (W.T. Bednall, 1897) - (CHITONIDAE)
- exoptata, Mandarina exoptata H.A. Pilsbry, 1902 - (CAMAENIDAE)
- exoptata, Neniatracta exoptata H. Nordsieck, 1999. - (CLAUSILIIDAE)
- exoptata, Strobeliella whateliana exoptata (A. Schmidt, 1857) - (CLAUSILIIDAE)
- exoptata, Flabellina exoptata T.M. Gosliner & R.C. Willan, 1991 - (FLABELLINIDAE)
- exoptata, Resania exoptata J.A. Bartrum & Powell, 1928 † - (MACTRIDAE) (FOSSIL)
- exoptata, Adrana exoptata H.A. Pilsbry & H.N. Lowe, 1932 - syn of: Adrana metcalfei (S.C.T. Hanley, 1860) - (NUCULANIDAE)
- exoptatus, Penion exoptatus (Powell & J.A. Bartrum, 1929 †) - (BUCCINIDAE) (FOSSIL)
- exopthalmica, Planctoteuthis exopthalmica (C. Chun, 1908) - (CHIROTEUTHIDAE)
- exorata, Lyria exorata (P. Bouchet & G.T. Poppe, 1988) - (VOLUTIDAE)
- exorata, Plicolyria exorata P. Bouchet & G.T. Poppe, 1988 - syn of: Lyria exorata (P. Bouchet & G.T. Poppe, 1988) - (VOLUTIDAE)
- exoratum, Echioceras exoratum C.T. Simpson, 1855 † - syn of: Echioceras exortum (C.T. Simpson, 1855 †) - (ECHIOCERATIDAE) (FOSSIL)
- exorbitans, Radiocentrum exorbitans (W.B. Miller, 1973) - (OREOHELICIDAE)
- exornata, Barbatia exornata (G.P. Deshayes, 1858 †) - (ARCIDAE) (FOSSIL)
- exornata, Herilla bosniensis exornata (A.J. Wagner, 1915) - (CLAUSILIIDAE)
- exornata, Omphaloptycha exornata E.A.L. Kittl, 1894 † - (COELOSTYLINIDAE) (FOSSIL)
- exornatus, Spirolaxis exornatus R. Bieler, 1993 - (ARCHITECTONICIDAE)
- exornatus, Naesiotus exornatus (L.A. Reeve, 1849) - (BULIMULIDAE)
- exorta, Cerion exorta (C.J. Maynard & W.F. Clapp, 1920) - (CERIONIDAE)
- exortum, Echioceras exortum (C.T. Simpson, 1855 †) - (ECHIOCERATIDAE) (FOSSIL)
- exorum, Depressizona exorum D.L. Geiger, 2003 - (DEPRESSIZONIDAE)
- Exosiperna, Genus Exosiperna T. Iredale, 1929 (MYTILIDAE)
- exotica, Iridina exotica J.B.P.A. Lamarck, 1819 - syn of: Mutela dubia J.F. Gmelin, 1793 - (IRIDINIDAE)
- exotica, Iridina exotica E.A. Smith, 1881 - syn of: Mutela soleniformis J.R. Bourguignat, 1885 - (IRIDINIDAE)
- exotica, Taiwannuculana exotica (T.A. Okutani & T.C. Lan, 1999) - (MALLETIIDAE)
- exotica, Anodontites trapesialis exotica (J.B.P.A. Lamarck, 1818) - (MYCETOPODIDAE)
- exotica, Ostrea exotica L.W. Dillwyn, 1817 - syn of: Lissochlamys exotica (L.W. Dillwyn, 1817) - (OSTREIDAE)
- exotica, Ostrea exotica H.S. Holten, 1802 - syn of: Lissochlamys exotica (L.W. Dillwyn, 1817) - (OSTREIDAE)
- exotica, Lissochlamys exotica (L.W. Dillwyn, 1817) - (PECTINIDAE)
- exotica, Chlamys exotica H.S. Holten, 1802 - syn of: Lissochlamys exotica (L.W. Dillwyn, 1817) - (PECTINIDAE)
- exotica, Meekia exotica Saul & W.P. Popenoe, 1962 † - (TANCREDIIDAE) (FOSSIL)
- Exotica, Genus Exotica Lamy, 1918 (TELLINIDAE) (FOSSIL)
- exotica, Tellina exotica (F.P. Jousseaume in É. Lamy, 1918) - (TELLINIDAE)
- Exotica, syn of: Genus Tellina C. Linnaeus, 1758 (TELLINIDAE)
- exotica, Bolma exotica (T.A. Okutani, 1969) - (TURBINIDAE)
- exotica, Anodonta exotica J.B.P.A. Lamarck, 1819 - syn of: Anodontites trapesialis exotica (J.B.P.A. Lamarck, 1818) - (UNIONIDAE)
- exotica, Valvata exotica Papp, 1954 † - (VALVATIDAE) (FOSSIL)
- exotica, Venerupis exotica S.C.T. Hanley, 1854 - syn of: Irus carditoides J.B.P.A. Lamarck, 1818 - (VENERIDAE)
- exotica, Portlandia exotica T.A. Okutani & T.C. Lan, 1999 - syn of: Taiwannuculana exotica (T.A. Okutani & T.C. Lan, 1999) - (YOLDIIDAE)
- Exoticeras, Genus Exoticeras Barskov & Shilovsky, 2014 (DOMATOCERATIDAE) (FOSSIL)
- exoticum, Exoticeras exoticum I.S. Barskov & Shilovsky, 2014 † - (DOMATOCERATIDAE) (FOSSIL)
- exoticum, Orthoceras exoticum Barrande, 1866 † - (ORTHOCERATIDAE) (FOSSIL)
- exoticus, Drymaeus exoticus S.I. Da Costa, 1901 - (BULIMULIDAE)
- exoticus, Lytoceras exoticus (Oppel 1863 †) - (LYTOCERATIDAE) (FOSSIL)
- exoticus, Pecten exoticus J.H. Chemnitz, 1795 - syn of: Lissochlamys exotica (L.W. Dillwyn, 1817) - (PECTINIDAE)
- exoticus, Anodon exoticus G.B. Sowerby, 1867 - syn of: Anodontites trapesialis exotica (J.B.P.A. Lamarck, 1818) - (UNIONIDAE)
- exoticus, Irus exoticus (J.B.P.A. Lamarck, 1818) - (VENERIDAE)
- Exotornoceras, Genus Exotornoceras Becker , 1993 (POSTTORNOCERATIDAE) (FOSSIL)
- expallescens, Staphylaea expallescens P. Dautzenberg, 1933 - syn of: Staphylaea staphylaea (C. Linnaeus, 1758) - (CYPRAEIDAE)
- expallescens, Pseudosimnia carnea expallescens F.A. Schilder, 1967 - (OVULIDAE)
- expallescens, Venus expallescens R.A. Philippi, 1844 - syn of: Eurhomalea rufa (J.B.P.A. Lamarck, 1818) - (VENERIDAE)
- expalliata, Mioawateria expalliata (C.R. Laws, 1947 †) - (RAPHITOMIDAE) (FOSSIL)
- expandens, Holopea expandens J. Perner, 1907 † - (HOLOPEIDAE) (FOSSIL)
- expandens, Holopella expandens J. Perner, 1903 † - (LOXONEMATIDAE) (FOSSIL)
- expandus, Discartemon expandus T. Siriboon & S. Panha, 2014 - (STREPTAXIDAE)
- expansa, Fernandezia expansa H.A. Pilsbry, 1911 - (ACHATINELLIDAE)
- expansa, Auriculella expansa W.H. Pease, 1868 - (ACHATINELLIDAE)
- expansa, Eusetia expansa (A.W.B. Powell, 1930) - (ACLIDIDAE)
- expansa, Mytilarca expansa Isberg, 1934 † - (AMBONYCHIIDAE) (FOSSIL)
- expansa, Pomacea expansa (K. Miller, 1879) - (AMPULLARIIDAE)
- expansa, Effusa expansa (K. Miller, 1879) - syn of: Pomacea expansa (K. Miller, 1879) - (AMPULLARIIDAE)
- expansa, Argonauta expansa W.H. Dall, 1872 - syn of: Argonauta cornutus T.A. Conrad, 1854 - (ARGONAUTIDAE)
- expansa, Salpingostoma expansa (J.W. Hall, 1847 †) - (BUCANIIDAE) (FOSSIL)
- expansa, Margarella expansa (G.B. I Sowerby, 1838) - (CALLIOSTOMATIDAE)
- expansa, Margarella expansa J.M. Gaillard, 1954 - syn of: Margarella refulgens (E.A. Smith, 1907) - (CALLIOSTOMATIDAE)
- expansa, Photinula expansa G.B. I Sowerby, 1838 - syn of: Margarella expansa (G.B. I Sowerby, 1838) - (CALLIOSTOMATIDAE)
- expansa, Planispira expansa (L. Pfeiffer, 1861) - (CAMAENIDAE)
- expansa, Cyclocardia expansa (H. Takeda, 1953 †) - (CARDITIDAE) (FOSSIL)
- expansa, Bucanospira expansa Ulrich & Scofield, 1897 † - (CRASPEDOSTOMATIDAE) (FOSSIL)
- expansa, Cypraea brocchii expansa J.P.S. Grateloup, 1840 - (CYPRAEIDAE)
- expansa, Geloina expansa (A. Mousson, 1849) - (CYRENIDAE)
- expansa, Corbicula expansa A. Mousson, 1849 - syn of: Geloina expansa (A. Mousson, 1849) - (CYRENIDAE)
- expansa, Cyrtodonta expansa (Portlock) † - (CYRTODONTIDAE) (FOSSIL)
- expansa, Naticopsis expansa (Laube, 1868 †) - (DELPHINULOPSIDAE) (FOSSIL)
- expansa, Diaphana expansa J.G. Jeffreys, 1864 - syn of: Diaphana minuta T. Brown, 1827 - (DIAPHANIDAE)
- expansa, Edmondia expansa Hind, 1899 † - (EDMONDIIDAE) (FOSSIL)
- expansa, Sthenorytis expansa (T.A. Conrad, 1842 †) - (EPITONIIDAE) (FOSSIL)
- expansa, Cranopsis expansa (W.H. Dall, 1896) - (FISSURELLIDAE)
- expansa, Rimula expansa W.H. Dall, 1896 - syn of: Cranopsis expansa (W.H. Dall, 1896) - (FISSURELLIDAE)
- expansa, Puncturella expansa W.H. Dall, 1896 - syn of: Cranopsis expansa (W.H. Dall, 1896) - (FISSURELLIDAE)
- expansa, Mourlonia expansa (B. Phillips, 1836 †) - (GOSSELETINIDAE) (FOSSIL)
- expansa, Deltoideum expansa (Sowerby, 1832 †) - (GRYPHAEIDAE) (FOSSIL)
- expansa, Haliotis expansa R.R. Talmadge, 1954 - syn of: Haliotis cracherodi W.E. Leach, 1814 - (HALIOTIDAE)
- expansa, Hyalogyra expansa B.A. Marshall, 1988 - (HYALOGYRINIDAE)
- expansa, Yochelsonella expansa Flower, 1968 † - (HYPSELOCONIDAE) (FOSSIL)
- expansa, Rissopsis expansa A.W.B. Powell, 1930 - syn of: Eusetia expansa (A.W.B. Powell, 1930) - (IRAVADIIDAE)
- expansa, Lesueurilla expansa E.F.R.K. Koken & J. Perner, 1925 † - syn of: Maclurites expansa (E.F.R.K. Koken & J. Perner, 1925 †) - (LESUEURILLIDAE) (FOSSIL)
- expansa, Lima expansa Forbes † - (LIMIDAE) (FOSSIL)
- expansa, Manningiella expansa R.A.M. Brandt, 1970 - (LITHOGLYPHIDAE)
- expansa, Paupospira expansa Secrist & Evitt, 1943 † - syn of: Paupospira tropidophora (F.B. Meek, 1873 †) - (LOPHOSPIRIDAE) (FOSSIL)
- expansa, Maclurites expansa (E.F.R.K. Koken & J. Perner, 1925 †) - (MACLURITIDAE) (FOSSIL)
- expansa, Lutraria oblonga expansa G.F. Dollfus, Cotter & R. dos Santos Gomes, 1904 † - (MACTRIDAE) (FOSSIL)
- expansa, Oenopota expansa G.O. Sars, 1878 - syn of: Oenopota violacea (J.W. Mighels & C.B. Adams, 1842) - (MANGELIIDAE)
- expansa, Hemithecella expansa Butts, 1941 † - (MATTHEVIIDAE) (FOSSIL)
- expansa, Melanopsis magnifica expansa P.M. Pallary, 1920 - (MELANOPSIDAE)
- expansa, Whiteavsia expansa W.J. Raymond, 1906 † - (MODIOLOPSIDAE) (FOSSIL)
- expansa, Modiolopsis expansa Portlock † - (MODIOMORPHIDAE) (FOSSIL)
- expansa, Typhina expansa (G.B. II Sowerby, 1874) - (MURICIDAE)
- expansa, Pteropurpura plorator expansa (G.B. Sowerby, 1860) - (MURICIDAE)
- expansa, Nerinea expansa Hudleston † - (NERINEIDAE) (FOSSIL)
- expansa, Neritina expansa A.E. Reuss, 1855 † - (NERITIDAE) (FOSSIL)
- expansa, Nuculana expansa Staadt & A.E.M. Cossmann, 1913 † - (NUCULANIDAE) (FOSSIL)
- expansa, Nucula expansa Wissmann, 1841 † - (NUCULIDAE) (FOSSIL)
- expansa, Nucula expansa L.A. Reeve, 1855 - syn of: Ennucula tenuis (G. Montagu, 1808) - (NUCULIDAE)
- expansa, Otina expansa R.P. Whitfield, 1865 † - syn of: Leptonotis expansus (R.P. Whitfield, 1865 †) - (OTINIDAE) (FOSSIL)
- expansa, Philine expansa Sowerby & G. Dixon, 1850 † - (PHILINIDAE) (FOSSIL)
- expansa, Elysia expansa (O'Donoghue, 1924) - (PLAKOBRANCHIDAE)
- expansa, Cryptaenia expansa Sowerby, 1821 † - syn of: Ptychomphalus expansus (Sowerby, 1821 †) - (PLEUROTOMARIIDAE) (FOSSIL)
- expansa, Annularia uncinata expansa C. de la Torre & P. Bartsch - (POMATIIDAE)
- expansa, Tricula gregoriana expansa Surya Rao, 1923 - (POMATIOPSIDAE)
- expansa, Praenucula expansa Pfab, 1934 † - syn of: Praenucula dispar (Barrande, 1881 †) - (PRAENUCULIDAE) (FOSSIL)
- expansa, Gamizyga expansa Hoare & Sturgeon, 1980 † - (PSEUDOZYGOPLEURIDAE) (FOSSIL)
- expansa, Pterotheca expansa (E. Emmons, 1842 †) - (PTEROTHECIDAE) (FOSSIL)
- expansa, Phragmosphaera expansa (J. de C. Sowerby & Murchison, 1839 †) - (PTEROTHECIDAE) (FOSSIL)
- expansa, Rissoina expansa P.P. Carpenter, 1865 - (RISSOINIDAE)
- expansa, Rissoina expansa G.P. Deshayes, 1864 † - syn of: Cossmannia expansa (G.P. Deshayes, 1864 †) - (RISSOINIDAE) (FOSSIL)
- expansa, Macoma expansa P.P. Carpenter, 1864 - (TELLINIDAE)
- expansa, Geomelania expansa C.B. Adams, 1849 - syn of: Geomelania jamaicensis L. Pfeiffer, 1845 - (TRUNCATELLIDAE)
- expansa, Vanikoro expansa (G.B. I Sowerby, 1842) - (VANIKORIDAE)
- expansa, Velutina expansa R.P. Whitfield, 1865 † - syn of: Leptonotis expansus (R.P. Whitfield, 1865 †) - (VELUTINIDAE) (FOSSIL)
- expansa, Verticordia expansa B. Prashad, 1932 - (VERTICORDIIDAE)
- expansa, Yoldiella expansa (J.G. Jeffreys, 1876) - (YOLDIIDAE)
- expansa, Cossmannia expansa (G.P. Deshayes, 1864 †) - (ZEBINIDAE) (FOSSIL)
- expansa perconica, Cossmannia expansa perconica A.E.M. Cossmann, 1907 † - (ZEBINIDAE) (FOSSIL)
- expansa porcellana, Auriculella expansa porcellana C.M.F. Ancey, 1889 - (ACHATINELLIDAE)
- expansilabra, Sabinella expansilabra R. Tate & W.L. May, 1910 - syn of: Sabinella munita (C. Hedley, 1903) - (EULIMIDAE)
- expansilabris, Amnicola expansilabris T.H. Aldrich, 1911 † - (AMNICOLIDAE) (FOSSIL)
- expansilabris, Emmericia expansilabris J.R. Bourguignat, 1880 - (AMNICOLIDAE)
- expansilabris, Omphalotropis expansilabris (L. Pfeiffer, 1852) - (ASSIMINEIDAE)
- expansilabris, Hemiphaedusa expansilabris (O. Böttger, 1878) - (CLAUSILIIDAE)
- expansilabris, Platyrhaphe expansilabris O.F. von Möllendorff, 1897 - (CYCLOPHORIDAE)
- expansilabris, Helix expansilabris W. Kobelt, 1906 - syn of: Helix pomatia C. Linnaeus, 1758 - (HELICIDAE)
- expansilabris, Helminthoglypta expansilabris H.A. Pilsbry, 1898 - (HELMINTHOGLYPTIDAE)
- expansilabris, Ancylus expansilabris S. Clessin, 1882 - (PLANORBIDAE)
- expansilabrum, Sierraia expansilabrum D.S. Brown, 1988 - (BITHYNIIDAE)
- expansilabrum, Iravadia expansilabrum W.F. Ponder, 1984 - (IRAVADIIDAE)
- expansilabrum, Scoliostoma expansilabrum C.L.F. von Sandberger & C.L.F. von Sandberger, 1853 † - (SCOLIOSTOMATIDAE) (FOSSIL)
- expansior, Xenophora infundibulum expansior F. Sacco, 1896 † - (XENOPHORIDAE) (FOSSIL)
- expanstoma, Chamalycaeus expanstoma H. Minato, 1982 - (CYCLOPHORIDAE)
- expansum, Barnesoceras expansum Flower, 1964 † - (ELLESMEROCERATIDAE) (FOSSIL)
- expansum, Ellesmeroceras expansum Flower, 1941 † - (ELLESMEROCERATIDAE) (FOSSIL)
- expansum, Ellipsoceras expansum M. Collignon, 1950 † - (LABECERATIDAE) (FOSSIL)
- expansum, Eutrephoceras expansum (Sowerby, 1824 †) - (NAUTILIDAE) (FOSSIL)
- expansum, Orthoceras expansum C.H. Blake, 1882 † - (ORTHOCERATIDAE) (FOSSIL)
- expansum, Trachysma expansum G.O. Sars, 1878 - syn of: Torellia delicata (R.A. Philippi, 1844) - (PENDROMIDAE)
- expansum, Hipparionoceras expansum Flower, 1945 † - (POLYELASMOCERATIDAE) (FOSSIL)
- expansum, Platysiphon expansum Flower, 1956 † - (PROTEROCAMEROCERATIDAE) (FOSSIL)
- expansum, Rioceras expansum Flower, 1964 † - (RIOCERATIDAE) (FOSSIL)
- expansum, Teinostoma expansum F. Rubio, R. Fernández-Garcés & E. Rolán, 2011 - (TORNIDAE)
- expansum, Enida expansum M.M. Schepman, 1908 - syn of: Enida japonica A. Adams, 1860 - (TROCHIDAE)
- expansus, Agoniatites expansus (Vanuxem, 1842 †) - (AGONIATITIDAE) (FOSSIL)
- expansus, Quadrinervus expansus (Brösamlen, 1909 †) - (APORRHAIDAE) (FOSSIL)
- expansus, Bucanopsis expansus J. de C. Sowerby & Murchison, 1839 † - syn of: Phragmosphaera expansa (J. de C. Sowerby & Murchison, 1839 †) - (BELLEROPHONTIDAE) (FOSSIL)
- expansus, Bucanopsis expansus J. de C. Sowerby & Murchison, 1839 † - syn of: Phragmosphaera expansa (J. de C. Sowerby & Murchison, 1839 †) - (BELLEROPHONTIDAE) (FOSSIL)
- expansus, Bellerophon expansus J. de C. Sowerby & Murchison, 1839 † - syn of: Phragmosphaera expansa (J. de C. Sowerby & Murchison, 1839 †) - (BELLEROPHONTIDAE) (FOSSIL)
- expansus, Drymaeus expansus (L. Pfeiffer, 1848) - (BULIMULIDAE)
- expansus, Cyclophorus expansus (L. Pfeiffer, 1851) - (CYCLOPHORIDAE)
- expansus, Alycaeus expansus Foon & Liew, 2017 - (CYCLOPHORIDAE)
- expansus, Cyrtonella expansus J.W. Hall, 1860 † - (CYRTOLITIDAE) (FOSSIL)
- expansus, Goniatites expansus Vanuxem, 1842 † - syn of: Agoniatites expansus (Vanuxem, 1842 †) - (GONIATITIDAE) (FOSSIL)
- expansus, Leptonotis expansus (R.P. Whitfield, 1865 †) - (HIPPONICIDAE) (FOSSIL)
- expansus, Cambrioconus expansus Stinchcomb, 1986 † - (HYPSELOCONIDAE) (FOSSIL)
- expansus, Diplodon expansus (H.C. Küster, 1853) - (HYRIIDAE)
- expansus, Diplodon expansus H.F.A. von Ihering, 1910 - syn of: Diplodon granosus (J.G. Bruguière, 1792) - (HYRIIDAE)
- expansus, Kirengella expansus Stinchcomb, 1986 † - (KIRENGELLIDAE) (FOSSIL)
- expansus, Littorina expansus T. Brown in J. Smith, 1839 - syn of: Littorina fabalis (W. Turton, 1825) - (LITTORINIDAE)
- expansus, Sluha expansus Barrande, 1881 † - (MALLETIIDAE) (FOSSIL)
- expansus, Xymene expansus (F.W. Hutton, 1882 †) - (MURICIDAE) (FOSSIL)
- expansus, Murex expansus G.B. II Sowerby, 1860 - syn of: Pteropurpura plorator (A. Adams & L.A. Reeve, 1845) - (MURICIDAE)
- expansus, Crenomytilus expansus (R. Arnold, 1907 †) - (MYTILIDAE) (FOSSIL)
- expansus, Pecten expansus Smith, 1847 † - (PECTINIDAE) (FOSSIL)
- expansus, Pecten expansus W.H. Dall, 1879 † - syn of: Patinopecten healeyi R. Arnold, 1906 † - (PECTINIDAE) (FOSSIL)
- expansus, Platyceras expansus T.A. Conrad, 1842 † - (PLATYCERATIDAE) (FOSSIL)
- expansus, Ptychomphalus expansus (Sowerby, 1821 †) - (PTYCHOMPHALIDAE) (FOSSIL)
- expansus, Charonia expansus Sowerby † - (RANELLIDAE) (FOSSIL)
- expansus, Lusitanops expansus (G.O. Sars, 1878) - (RAPHITOMIDAE)
- expansus, Strombus expansus G.W. Tryon, 1885 - syn of: Labiostrombus epidromis (C. Linnaeus, 1758) - (STROMBIDAE)
- expansus, Turbo expansus T. Brown in J. Smith, 1839 - syn of: Littorina fabalis (W. Turton, 1825) - (TURBINIDAE)
- expansus, Unio expansus H.C. Küster, 1856 - syn of: Diplodon expansus (H.C. Küster, 1853) - (UNIONIDAE)
- expansus altorum, Drymaeus expansus altorum W.K. Weyrauch, 1958 - (BULIMULIDAE)
- expansus balboa, Drymaeus expansus balboa H.A. Pilsbry, 1926 - (BULIMULIDAE)
- expansus eurhynchus, Diplodon expansus eurhynchus (H.C. Küster, 1861) - (HYRIIDAE)
- expansus flavilabrum, Drymaeus expansus flavilabrum W.K. Weyrauch, 1967 - (BULIMULIDAE)
- expansus mimus, Diplodon expansus mimus C.T. Simpson, 1914 - (HYRIIDAE)
- expansus orcesi, Drymaeus expansus orcesi W.K. Weyrauch, 1958 - (BULIMULIDAE)
- expansus perenensis, Drymaeus expansus perenensis S.I. Da Costa, 1901 - (BULIMULIDAE)
- expansus scitus, Drymaeus expansus scitus A. Adams, 1867 - syn of: Drymaeus expansus (L. Pfeiffer, 1848) - (BULIMULIDAE)
- expansus semigranosus, Diplodon expansus semigranosus C.T. Simpson, 1914 - (HYRIIDAE)
- expansus subprotractus, Drymaeus expansus subprotractus H.A. Pilsbry, 1901 - (BULIMULIDAE)
- expansus vanattai, Drymaeus expansus vanattai H.A. Pilsbry, 1898 - (BULIMULIDAE)
- expatriatus, Drymaeus expatriatus H.B. Preston, 1909 - (BULIMULIDAE)
- expatriatus, Chamalycaeus expatriatus (W.T. Blanford & H.F. Blanford, 1860) - (CYCLOPHORIDAE)
- expectans, Straparollus expectans J. Perner, 1907 † - (EUOMPHALIDAE) (FOSSIL)
- expectata, Onchidoris expectata Martynov & Korshunova, 2017 - (ONCHIDORIDIDAE)
- expectatum, Clauseniceras expectatum (Wedekind, 1913 †) - (GEPHUROCERATIDAE) (FOSSIL)
- expedenta, Candidula expedenta É.A.A. Locard, 1899 - syn of: Candidula intersecta (J.L.M. Poiret, 1801) - (HYGROMIIDAE)
- expedita, Conchothyra expedita H.J. Finlay & J. Marwick, 1937 - (STRUTHIOLARIIDAE)
- expeditionis, Apaturris expeditionis (W.R.B. Oliver, 1915) - (BORSONIIDAE)
- expeditionis, Galadistes expeditionis (J.C. Cox, 1868) - (CAMAENIDAE)
- expeditionis, Helix expeditionis J.C. Cox, 1868 - syn of: Galadistes expeditionis (J.C. Cox, 1868) - (HELICIDAE)
- expeditionis, Mitromorpha expeditionis W.R.B. Oliver, 1915 - syn of: Apaturris expeditionis (W.R.B. Oliver, 1915) - (MITROMORPHIDAE)
- expeditionis, Exilia expeditionis (R.K. Dell, 1956) - (PTYCHATRACTIDAE)
- expeditionis, Surculina expeditionis R.K. Dell, 1956 - syn of: Exilia expeditionis (R.K. Dell, 1956) - (PTYCHATRACTIDAE)
- expeditionis, Pleurotomella expeditionis (R.K. Dell, 1956) - (RAPHITOMIDAE)
- expeditum, Pseudogrammoceras expeditum Buckman, 1902 † - syn of: Pseudogrammoceras fallaciosum (C.É. Bayle, 1878 †) - (HILDOCERATIDAE) (FOSSIL)
- experta, Westralaoma experta T. Iredale, 1939 - (PUNCTIDAE)
- experta, Awheaturris experta (C.R. Laws, 1947 †) - (RAPHITOMIDAE) (FOSSIL)
- expetendus, Microptychis expetendus Hoare & Sturgeon, 1981 † - (PSEUDOZYGOPLEURIDAE) (FOSSIL)
- expicta, Westralaoma expicta T. Iredale, 1939 - (PUNCTIDAE)
- expidita, Eopleurotoma expidita (G.P. Deshayes, 1865 †) - (TURRIDAE) (FOSSIL)
- explanata, Neklania explanata (Barrande, 1881 †) - (ANTIPLEURIDAE) (FOSSIL)
- explanata, Archinacella explanata Wilson, 1951 † - (ARCHINACELLIDAE) (FOSSIL)
- explanata, Crepidula explanata A.A. Gould, 1853 - syn of: Crepidula perforans (A. Valenciennes, 1846) - (CALYPTRAEIDAE)
- explanata, Helcionella explanata S.Y. Feng & al., 2000 † - (HELCIONELLIDAE) (FOSSIL)
- explanata, Murella scabriuscula explanata (L. Benoit, 1857) - (HELICIDAE)
- explanata, Dumortieria explanata (Buckman 1904 †) - (HILDOCERATIDAE) (FOSSIL)
- explanata, Xerosecta explanata (O.F. Müller, 1774) - (HYGROMIIDAE)
- explanata, Mactrotoma explanata (L.A. Reeve, 1854) - (MACTRIDAE)
- explanata, Natica explanata P.F. Röding, 1798 - syn of: Naticarius orientalis (J.F. Gmelin, 1791) - (NATICIDAE)
- explanata, Talona explanata (L. Spengler, 1792) - (PHOLADIDAE)
- explanata, Carinaropsis explanata Ulrich & Scofield, 1897 † - (PTEROTHECIDAE) (FOSSIL)
- explanata, Albea explanata (O.F. Müller, 1774) - (SPHINCTEROCHILIDAE)
- explanata, Catinella explanata (A.A. Gould, 1852) - (SUCCINEIDAE)
- explanator, Cassinoceras explanator (R.P. Whitfield, 1886 †) - (PILOCERATIDAE) (FOSSIL)
- explanatum, Procerithium explanatum Yamnichenko, 1987 † - syn of: Cryptaulax protortile L.R. Cox, 1965 † - (PROCERITHIIDAE) (FOSSIL)
- explanatus, Belemnites explanatus J. Phillips, 1870 † - (BELEMNITELLIDAE) (FOSSIL)
- explanatus, Straparollus explanatus de Koninck, 1881 † - (EUOMPHALIDAE) (FOSSIL)
- explanatus, Papilloconus explanatus S.Y. Feng & al., 2000 † - syn of: Helcionella explanata S.Y. Feng & al., 2000 † - (HELCIONELLIDAE) (FOSSIL)
- expleta, Aldisa expleta J.A. Ortea, A.M. Pérez & E.M. Llera, 1981 - syn of: Aldisa banyulensis A. Pruvot-Fol, 1951 - (CADLINIDAE)
- expleta, Neomenia expleta Ó. García-Álvarez, M. Zamarro & V. Urgorri, 2010 - (NEOMENIIDAE)
- explicata, Brocchinia explicata (C.R. Laws, 1935 †) - (CANCELLARIIDAE) (FOSSIL)
- explicata, Nucinella explicata Berezovsky, 2015 † - (NUCINELLIDAE) (FOSSIL)
- explicata, Cyrtonaias explicata (P.M.A. Morelet, 1849) - (UNIONIDAE)
- explicatum, Pseudogrammoceras explicatum Buckman, 1904 † - syn of: Pseudogrammoceras doerntense (Denckmann, 1887 †) - (HILDOCERATIDAE) (FOSSIL)
- explicatus, Pachychilus explicatus (P.H. Fischer & J.C.H. Crosse, 1892) - (PACHYCHILIDAE)
- explicatus, Unio explicatus P.M.A. Morelet, 1849 - syn of: Cyrtonaias livida (C.T. Simpson, 1900) - (UNIONIDAE)
- explicibilis, Manaria explicibilis Fraussen & Stahlschmidt, 2016 - (BUCCINIDAE)
- explicita, Quirella explicita Peñas & Rolán, 2017 - (PYRAMIDELLIDAE)
- explorata, Cavolinia explorata P.D. Montfort, 1810 - syn of: Cavolinia inflexa (C.A. Lesueur, 1813) - (CAVOLINIIDAE)
- explorata, Maoricrater explorata (R.K. Dell, 1953) - (LEPETIDAE)
- explorator, Jerrybuccinum explorator (K. Fraussen & J. Sellanes, 2008) - (BUCCINIDAE)
- explorator, Purpuriconus explorator (D.L.N. Vink, 1990) - (CONIDAE)
- explorator caysalensis, Purpuriconus explorator caysalensis L. Raybaudi Massilia & A. Prati Musetti, 1994 - syn of: Purpuriconus caysalensis (L. Raybaudi Massilia & A. Prati Musetti, 1994) - (CONIDAE)
- exploratorum, Syrnola exploratorum A. Peñas & E. Rolán, 2016 - (PYRAMIDELLIDAE)
- exploratum, Mixomanticoceras exploratum Becker & al., 1993 † - (GEPHUROCERATIDAE) (FOSSIL)
- Expocystis, syn of: Genus Tengchiena F.C. Baker, 1942 (EUCONULIDAE)
- expoliatum, Ptychopoma expoliatum P.M. Heude, 1885 - (CYCLOPHORIDAE)
- expoliatum vestitum, Ptychopoma expoliatum vestitum P.M. Heude, 1885 - (CYCLOPHORIDAE)
- expolita, Mitrella expolita K. Monsecour & D. Monsecour, 2016 - (COLUMBELLIDAE)
- expolita, Waldemaria japonica expolita (H.A. Pilsbry, 1903) - (HELICINIDAE)
- expolitum, Dendropoma expolitum R.E. Golding, R. Bieler, T.A. Rawlings & T.M. Collins, 2014 - (VERMETIDAE)
- expolitus, Magilus expolitus (T. Shikama, 1963) - (MURICIDAE)
- exponens, Bellerophon exponens J.W. Hall, 1879 † - syn of: Bellerophon pelops J.W. Hall, 1862 † - (BELLEROPHONTIDAE) (FOSSIL)
- exporrecta, Bakevellia exporrecta (Lepsius, 1878 †) - (BAKEVELLIIDAE) (FOSSIL)
- exporrecta, Gervillia exporrecta Lepsius, 1878 † - syn of: Bakevellia exporrecta (Lepsius, 1878 †) - (MYALINIDAE) (FOSSIL)
- exporrecta, Subulophora exporrecta C.F. Laseron, 1958 - syn of: Subulophora rutilans (R.P.J. Hervier, 1898) - (TRIPHORIDAE)
- exporrecta, Coriophora exporrecta C.F. Laseron - syn of: Subulophora rutilans (R.P.J. Hervier, 1898) - (TRIPHORIDAE)
- exposita, Mitra exposita T. Iredale, 1936 - syn of: Mitra glabra W.J. Swainson, 1821 - (MITRIDAE)
- exposita, Protonerita exposita E.A.L. Kittl, 1894 † - syn of: Neritaria comensis (R. Hoernes, 1856 †) - (NERITIDAE) (FOSSIL)
- exposita, Coxiella exposita (T. Iredale, 1943) - (POMATIOPSIDAE)
- expositum, Sinumelon expositum T. Iredale, 1937 - (CAMAENIDAE)
- expositum, Fanulum expositum (A. Mousson, 1873) - (EUCONULIDAE)
- expositus, Aviculopecten expositus Reed, 1944 † - (AVICULOPECTINIDAE) (FOSSIL)
- expositus, Hadopyrgus expositus M. Haase, 2008 - (HYDROBIIDAE)
- expressa, Parthenina expressa Peñas & Rolán, 2017 - (PYRAMIDELLIDAE)
- expressa, Pilsbryoconcha expressa (E.C. Von Martens, 1900) - (UNIONIDAE)
- expressus, Callistochiton expressus (P.P. Carpenter, 1865) - (CALLISTOPLACIDAE)
- expulsus, Rhabdocolpus expulsus A.E.M. Cossmann, 1912 † - syn of: Procerithium russiense (A.V.M.D. D'Orbigny, 1845 †) - (PROCERITHIIDAE) (FOSSIL)
- Exputens, Genus Exputens Clark, 1934 (PTERIIDA (UNASSIGNED)) (FOSSIL)
- exquisita, Acanthochitona exquisita (H.A. Pilsbry, 1893) - (ACANTHOCHITONIDAE)
- exquisita, Anatoma exquisita M.M. Schepman, 1908 - syn of: Anatoma japonica (C.B. Adams, 1862) - (ANATOMIDAE)
- exquisita, Hydatina exquisita R.P.A. Voskuil, 1995 - (APLUSTRIDAE)
- exquisita, Spirolaxis exquisita W.H. Dall & C.T. Simpson, 1901 - syn of: Spirolaxis centrifuga (T.A. de M. Monterosato, 1890) - (ARCHITECTONICIDAE)
- exquisita, Omphalotropis exquisita (L. Pfeiffer, 1855) - (ASSIMINEIDAE)
- exquisita, Fusipagoda exquisita (W.H. Dall, 1913) - (BUCCINIDAE)
- exquisita, Mohnia exquisita W.H. Dall, 1913 - syn of: Fusipagoda exquisita (W.H. Dall, 1913) - (BUCCINIDAE)
- exquisita, Bullina exquisita J.T.L. McGinty, 1955 - (BULLINIDAE)
- exquisita, Fusiaphera exquisita H.B. Preston, 1905 - syn of: Fusiaphera macrospira producta (A. Adams & L.A. Reeve, 1850) - (CANCELLARIIDAE)
- exquisita, Sundaya exquisita W.R.B. Oliver, 1915 - (CERITHIOPSIDAE)
- exquisita, Seila exquisita A. Cecalupo & I. Perugia, 2012 - (CERITHIOPSIDAE)
- exquisita, Cerithiopsis exquisita G.B. III Sowerby, 1897 - (CERITHIOPSIDAE)
- exquisita, Pseudocharopa exquisita A.J. Peile, 1929 - (CHAROPIDAE)
- exquisita, Discocharopa exquisita T. Iredale, 1913 - (CHAROPIDAE)
- exquisita, Lienardia exquisita (G. Nevill & H. Nevill, 1875) - (CLATHURELLIDAE)
- exquisita, Thala exquisita A. Garrett, 1872 - (COSTELLARIIDAE)
- exquisita, Costellaria exquisita G.B. III Sowerby, 1889 - syn of: Vexillum suluense (A. Adams & L.A. Reeve, 1850) - (COSTELLARIIDAE)
- exquisita, Cylichna exquisita J.T.L. McGinty, 1955 - (CYLICHNIDAE)
- exquisita, Polymesoda exquisita (T. Prime, 1867) - (CYRENIDAE)
- exquisita, Cyanocyclas exquisita W.B. Marshall, 1924 - syn of: Corbicula limosa (W.G. Maton, 1809) - (CYRENIDAE)
- exquisita, Turritoma exquisita P. Bartsch, 1941 - syn of: Oenopota candida (M. Yokoyama, 1926) - (EOTOMARIIDAE)
- exquisita, Foratiscala exquisita P. Bouchet & A. Warén, 1986 - syn of: Eccliseogyra exquisita (P. Bouchet & A. Warén, 1986) - (EPITONIIDAE)
- exquisita, Mucronalia exquisita G.B. III Sowerby, 1915 - (EULIMIDAE)
- exquisita, Cranopsis exquisita (A. Adams, 1853) - (FISSURELLIDAE)
- exquisita, Fissurella exquisita L.A. Reeve, 1840 - syn of: Fissurella radiosa R.P. Lesson, 1831 - (FISSURELLIDAE)
- exquisita, Rimula exquisita A. Adams, 1853 - syn of: Cranopsis exquisita (A. Adams, 1853) - (FISSURELLIDAE)
- exquisita, Cataschisma exquisita (Lindström, 1884 †) - (GOSSELETINIDAE) (FOSSIL)
- exquisita, Haloceras exquisita A. Warén & P. Bouchet, 1991 - (HALOCERATIDAE)
- exquisita, Austroharpa exquisita (T. Iredale, 1931) - (HARPIDAE)
- exquisita, Anacithara exquisita C. Hedley, 1922 - (HORAICLAVIDAE)
- exquisita, Julia exquisita A.A. Gould, 1862 - (JULIIDAE)
- exquisita, Lucina exquisita F.E. Eames, 1951 † - (LUCINIDAE) (FOSSIL)
- exquisita, Propebela exquisita P. Bartsch, 1941 - (MANGELIIDAE)
- exquisita, Cytharopsis exquisita (E.A. Smith, 1882) - (MANGELIIDAE)
- exquisita, Curtitoma exquisita (M. Yokoyama, 1926) - (MANGELIIDAE)
- exquisita, Serrata exquisita F. Boyer, 2008 - (MARGINELLIDAE)
- exquisita, Mitra exquisita A. Garrett, 1873 - syn of: Vexillum exquisitum (A. Garrett, 1873) - (MITRIDAE)
- exquisita, Nassaria exquisita K. Fraussen & G.T. Poppe, 2007 - (NASSARIIDAE)
- exquisita, Eccliseogyra exquisita (P. Bouchet & A. Warén, 1986) - (NYSTIELLIDAE)
- exquisita, Belloliva exquisita (G.F. Angas, 1871) - (OLIVIDAE)
- exquisita, Pseudocypraea exquisita E.J. Petuch, 1979 - (PEDICULARIIDAE)
- exquisita, Martesia exquisita P. Bartsch & H.A. Rehder, 1945 - syn of: Martesia fragilis A.E. Verrill & K.J. Bush, 1898 - (PHOLADIDAE)
- exquisita, Phyllidia exquisita D.J. Brunckhorst, 1993 - (PHYLLIDIIDAE)
- exquisita, Eirlysia exquisita Batten, 1956 † - (PHYMATOPLEURIDAE) (FOSSIL)
- exquisita, Pinna exquisita (W.H. Dall, P. Bartsch & H.A. Rehder, 1938) - (PINNIDAE)
- exquisita, Subitopinna exquisita W.H. Dall, P. Bartsch & H.A. Rehder, 1938 - syn of: Pinna exquisita (W.H. Dall, P. Bartsch & H.A. Rehder, 1938) - (PINNIDAE)
- exquisita, Scissurella exquisita M.M. Schepman, 1908 - syn of: Anatoma japonica (C.B. Adams, 1862) - (SCISSURELLIDAE)
- exquisita, Benthobrookula exquisita (A.H. Clarke, 1961) - (SEGUENZIOIDEA (UNASSIGNED))
- exquisita, Brookula exquisita A.H. Clarke, 1961 - syn of: Benthobrookula exquisita (A.H. Clarke, 1961) - (SEGUENZIOIDEA (unassigned))
- exquisita, Tjaernoeia exquisita (J.G. Jeffreys, 1883) - (TJAERNOEIIDAE)
- exquisita, Pleurotoma exquisita E.A. Smith, 1882 - syn of: Cytharopsis exquisita (E.A. Smith, 1882) - (TURRIDAE)
- exquisita, Torrecoptis barbouri exquisita (W.J. Clench, 1966) - (UROCOPTIDAE)
- exquisita borbonica, Julia exquisita borbonica G.P. Deshayes, 1863 - (JULIIDAE)
- exquisitum, Vexillum exquisitum (A. Garrett, 1873) - (COSTELLARIIDAE)
- exquisitum, Morum exquisitum (A. Adams & L.A. Reeve, 1848) - (HARPIDAE)
- exquisitum, Trachysma exquisitum J.G. Jeffreys, 1883 - syn of: Tjaernoeia exquisita (J.G. Jeffreys, 1883) - (PENDROMIDAE)
- exquisitum, Chondropometes exquisitum C. de la Torre & P. Bartsch, 1938 - (POMATIIDAE)
- exquisitum cereum, Chondropometes exquisitum cereum C. de la Torre & P. Bartsch, 1938 - (POMATIIDAE)
- exquisitum notatum, Chondropometes exquisitum notatum C. de la Torre & P. Bartsch, 1938 - (POMATIIDAE)
- exquisitum punctolineatum, Chondropometes exquisitum punctolineatum C. de la Torre & P. Bartsch, 1938 - (POMATIIDAE)
- exquisitus, Sphaerocyclus exquisitus Spitz, 1907 † - (BELLEROPHONTIDAE) (FOSSIL)
- exquisitus, Conus exquisitus G.B. III Sowerby, 1887 - syn of: Purpuriconus cardinalis (C.H. Hwass in J.G. Bruguière, 1792) - (CONIDAE)
- exquisitus, Collina exquisitus Spitz, 1907 † - (DACTYLIOCERATIDAE) (FOSSIL)
- exquisitus, Buliminus exquisitus G. Nägele, 1901 - (ENIDAE)
- exquisitus, Euphemites exquisitus E.L. Yochelson, 1960 † - (EUPHEMITIDAE) (FOSSIL)
- exquisitus, Subpterynotus exquisitus (G.B. III Sowerby, 1904) - (MURICIDAE)
- exquisitus, Lacunoides exquisitus A. Warén & P. Bouchet, 1989 - (NEOMPHALIDAE)
- exquisitus, Cyclopecten exquisitus G. Grau, 1959 - (PROPEAMUSSIIDAE)
- exquisitus, Parathetidites exquisitus (McLearn, 1947 †) - (THETIDITIDAE) (FOSSIL)
- exquisitus, Solariorbis exquisitus H.A. Pilsbry & A.A. Olsson, 1952 - (TORNIDAE)
- exquisitus, Carswellena exquisitus (G.F. Angas, 1877) - (TURBINIDAE)
- exrectus, Ramosites exrectus Ruzhencev & Bogoslovskaya, 1978 † - (RAMOSITIDAE) (FOSSIL)
- Exrhysota, Subgenus Bertia (Exrhysota) F.C. Baker, 1941 (TROCHOMORPHIDAE)
- exsanguis, Indomitrella exsanguis K. Monsecour & D. Monsecour, 2016 - (COLUMBELLIDAE)
- exsarcus, Nassarius exsarcus (W.H. Dall, 1908) - (NASSARIIDAE)
- exsculpta, Bohaispira exsculpta Y.F. Huang, 1983 † - (BOHAISPIRIDAE) (FOSSIL)
- exsculpta, Cominella exsculpta (H.H. Suter, 1917 †) - (BUCCINIDAE) (FOSSIL)
- exsculpta, Pollia exsculpta (F. Dujardin, 1837 †) - (BUCCINIDAE) (FOSSIL)
- exsculpta, Tritonidea exsculpta F. Dujardin, 1837 † - syn of: Pollia aquitanensis (M.A. Peyrot, 1924 †) - (BUCCINIDAE) (FOSSIL)
- exsculpta, Etrema exsculpta A.W.B. Powell, 1944 † - (CLATHURELLIDAE) (FOSSIL)
- exsculpta, Drillia exsculpta R.B. Watson, 1882 - syn of: Belomitra pourtalesii (W.H. Dall, 1881) - (DRILLIIDAE)
- exsculpta, Mangelia exsculpta R.B. Watson, 1881 - (MANGELIIDAE)
- exsculpta, Mangelia exsculpta W.H. Dall, 1889 - syn of: Belomitra pacifica (W.H. Dall, 1908) - (MANGELIIDAE)
- exsculpta, Pleurotoma exsculpta R.B. Watson, 1882 - syn of: Belomitra pourtalesii (W.H. Dall, 1881) - (TURRIDAE)
- exsculptum, Buccinulum vittatum exsculptum A.W.B. Powell, 1929 - (BUCCINIDAE)
- exsculptus, Cantharus exsculptus (F. Dujardin, 1837 †) - (BUCCINIDAE) (FOSSIL)
- exsculptus, Fusiguraleus exsculptus (A.W.B. Powell, 1942 †) - (MANGELIIDAE) (FOSSIL)
- exsculptus, Paratrophon cheesemani exsculptus A.W.B. Powell, 1933 - (MURICIDAE)
- exserta, Tornatina exserta C. Hedley, 1903 - (CYLICHNIDAE)
- exserta, Scacchia exserta J. van der Linden, 1996 - (LASAEIDAE)
- exserta, Littorina exserta P. Dautzenberg & H. Fischer, 1915 - syn of: Littorina obtusata (C. Linnaeus, 1758) - (LITTORINIDAE)
- exserta, Oenopota exserta C.W.S. Aurivillius, 1885 - syn of: Oenopota violacea (J.W. Mighels & C.B. Adams, 1842) - (MANGELIIDAE)
- exserta, Brotia oppenoorthi exserta C.H. Oostingh, 1935 - (PACHYCHILIDAE)
- exserta, Syrnola exserta C.F. Laseron, 1959 - (PYRAMIDELLIDAE)
- exserta, Ringicula exserta R.B. Hinds - (RINGICULIDAE)
- exserta, Alvania exserta (H.H. Suter, 1908) - (RISSOIDAE)
- exserta, Stenotheca exserta Sardeson † - (STENOTHECIDAE) (FOSSIL)
- exserta, Tryblidium exserta Sardeson, 1892 † - (TRYBLIDIIDAE) (FOSSIL)
- exserta, Tapes exserta A. Römer, 1872 - syn of: Marcia recens (H.S. Holten, 1802) - (VENERIDAE)
- exsertum, Dendropoma exsertum (W.H. Dall, 1881) - (VERMETIDAE)
- exsertus, Straparollus exsertus Hudleston † - (EUOMPHALIDAE) (FOSSIL)
- exsertus, Geophorus exsertus (E.C. Von Martens, 1891) - (HELICINIDAE)
- exsertus, Radulonectites exsertus C. Chen, 1982 † - (PECTINIDAE) (FOSSIL)
- exsignata, Sepia exsignata K.H. Barnard, 1962 - syn of: Sepia burnupi W.E. Hoyle, 1904 - (SEPIIDAE)
- exsiliens, Trochagnesia exsiliens (C.L.F. von Sandberger & C.L.F. von Sandberger, 1853 †) - (PORCELLIIDAE) (FOSSIL)
- exsilium, Blauneria exsilium H.B. Preston, 1912 - (ELLOBIIDAE)
- exspectata, Circuloscala exspectata M.E.A. de Boury, 1913 † - syn of: Epitonium subscalare (A.V.M.D. D'Orbigny, 1852 †) - (EPITONIIDAE) (FOSSIL)
- exspectatus, Crickites exspectatus Wedekind, 1913 † - syn of: Clauseniceras expectatum (Wedekind, 1913 †) - (GEPHUROCERATIDAE) (FOSSIL)
- exspinata, Hysteroconcha exspinata L.A. Reeve, 1863 - syn of: Hysteroconcha lupanaria (R.P. Lesson, 1831) - (VENERIDAE)
- exsputa, Amalda exsputa (J.A. Bartrum & A.W.B. Powell, 1928 †) - (ANCILLARIIDAE) (FOSSIL)
- exstans, Mangelia exstans K.H. Barnard, 1958 - (MANGELIIDAE)
- exstincteliratus, Nassarius exstincteliratus (Fischer in J. Wanner, 1927 †) - (NASSARIIDAE) (FOSSIL)
- exstriatulum, Pratulum exstriatulum F. Sacco, 1899 - syn of: Pratulum pulchellum (J.E. Gray, 1843) - (CARDIIDAE)
- exstriolata, Raphitoma exstriolata S. Cerulli-Irelli, 1910 - syn of: Mangelia costulata A. Risso, 1826 - (RAPHITOMIDAE)
- exstructa, Comitas exstructa (E.C. Von Martens, 1904) - (PSEUDOMELATOMIDAE)
- Exsuavitas, Subgenus Aquebana (Exsuavitas) F.C. Baker, 1939 (SAGDIDAE)
- exsul, Maclurites exsul E.F.R.K. Koken, 1897 † - (MACLURITIDAE) (FOSSIL)
- exsul, Pellasimnia exsul T. Iredale, 1935 - syn of: Pellasimnia maccoyi (J.E. Tenison-Woods, 1878) - (OVULIDAE)
- exsul, Phenacovolva exsul T. Iredale, 1935 - syn of: Pellasimnia angasi (L.A. Reeve, 1865) - (OVULIDAE)
- exsulans, Tritonia exsulans L.S.R. Bergh, 1894 - (TRITONIIDAE)
- exsulcata, Syrnola exsulcata A. Peñas & E. Rolán, 2016 - (PYRAMIDELLIDAE)
- exsultans, Papuina exsultans (C.M. Tapparone-Canefri, 1883) - (CAMAENIDAE)
- extendia, Worthenia extendia Tong & Erwin, 2001 † - (LOPHOSPIRIDAE) (FOSSIL)
- Extendilabrum, syn of: Genus Patellilabia Knight, 1945 (KNIGHTITIDAE) (FOSSIL)
- extensa, Leptachatina extensa W.H. Pease, 1870 - (AMASTRIDAE)
- extensa, Pomacea extensa (J.P. Müller, 1879) - (AMPULLARIIDAE)
- extensa, Astarte extensa B. Phillips, 1929 † - (ASTARTIDAE) (FOSSIL)
- extensa, Gervilliopsis ensiformis extensa L.W. Stephenson, 1941 † - (BAKEVELLIIDAE) (FOSSIL)
- extensa, Chloraea extensa (O.F. Müller, 1774) - (BRADYBAENIDAE)
- extensa, Buchia extensa Holdhaus, 1913 † - (BUCHIIDAE) (FOSSIL)
- extensa, Cupedora extensa T. Iredale, 1937 - (CAMAENIDAE)
- extensa, Strophiops extensa C.J. Maynard, 1924 - (CERIONIDAE)
- extensa, Albinaria teres extensa (L. Pfeiffer, 1864) - (CLAUSILIIDAE)
- extensa, Omphaloptycha extensa E.A.L. Kittl, 1899 † - (COELOSTYLINIDAE) (FOSSIL)
- extensa, Naticopsis extensa C.O. Waterhouse, 1963 † - (DELPHINULOPSIDAE) (FOSSIL)
- extensa, Radix extensa (Gorjanovic-Kramberger, 1890 †) - (LYMNAEIDAE) (FOSSIL)
- extensa, Plethospira extensa J. Heller, 1954 † - (MURCHISONIIDAE) (FOSSIL)
- extensa, Vitularia extensa M. Smith, 1947 - syn of: Vitularia salebrosa (P.P. King, 1832) - (MURICIDAE)
- extensa, Opisthoteuthis extensa K.H.J. Thiele, 1915 - (OPISTHOTEUTHIDAE)
- extensa, Crassostrea extensa (G.P. Deshayes, 1832 †) - (OSTREIDAE) (FOSSIL)
- extensa, Tragatoma extensa (Heidenhain, 1869 †) - (PLEUROTOMARIOIDEA (UNASSIGNED)) (FOSSIL)
- extensa, Mioawateria extensa (W.H. Dall, 1881) - (RAPHITOMIDAE)
- extensa, Juga extensa (Martens, 1905) - (SEMISULCOSPIRIDAE)
- extensa, Trochotoma extensa (P. Morris & J. Lycett, 1851 †) - (TROCHOTOMIDAE) (FOSSIL)
- extensa, Yoldiella extensa J.A. Allen, A. Sanders & G. Hannah, 1995 - (YOLDIIDAE)
- extensaeformis, Mioawateria extensaeformis (M.M. Schepman, 1913) - (RAPHITOMIDAE)
- extensesculpta, Clavatula kraepelini extensesculpta (H. Strebel, 1914) - (CLAVATULIDAE)
- extensibilis, Deshayesiella extensibilis B.I. Sirenko, 1973 - syn of: Deshayesiella curvata (P.P. Carpenter in W.H. Dall, 1879) - (LEPTOCHITONIDAE)
- extensiva, Palaeomutela extensiva Gusev † - (PALAEOMUTELIDAE) (FOSSIL)
- extensum, Entolium extensum Yu & Li † - syn of: Entolium inequivalve I. Hayami, 1959 † - (ENTOLIIDAE) (FOSSIL)
- extensum, Aliculastrum extensum J. de C. Sowerby - (HAMINOEIDAE)
- extensum, Orthonychia extensum (Barrois, 1889 †) - (ORTHONYCHIIDAE) (FOSSIL)
- extensum, Platyceras extensum Barrois, 1889 † - syn of: Orthonychia extensum (Barrois, 1889 †) - (PLATYCERATIDAE) (FOSSIL)
- extensum, Labyrinthoceras extensum Buckman † - (SPHAEROCERATIDAE) (FOSSIL)
- extensum, Tarphyceras extensum A. Hyatt, 1894 † - (TARPHYCERATIDAE) (FOSSIL)
- extensum, Proplina extensum (Berkey, 1898 †) - (TRYBLIDIIDAE) (FOSSIL)
- extensus, Bostryx extensus F. Haas, 1955 - (BULIMULIDAE)
- extensus, Conus extensus Hoernes, 1851 † - (CONIDAE) (FOSSIL)
- extensus, Squamuliferipecten extensus (E.M. Fletcher, 1929 †) - (DELTOPECTINIDAE) (FOSSIL)
- extensus, Ectenolites extensus Flower, 1964 † - (ELLESMEROCERATIDAE) (FOSSIL)
- extensus, Worthenia extensus Yin & E.L. Yochelson, 1983 † - (LOPHOSPIRIDAE) (FOSSIL)
- extensus, Modiolus extensus Lutkevitch & Lobanova, 1960 † - (MYTILIDAE) (FOSSIL)
- extensus, Unio extensus I. Lea, 1857 - syn of: Elliptio pullata (I. Lea, 1856) - (UNIONIDAE)
- extensus, Tapes extensus É.A.A. Locard, 1886 - syn of: Venerupis decussata (C. Linnaeus, 1758) - (VENERIDAE)
- extenta, Pleurophopsis extenta E.M. Krylova & L.I. Moskalev, 1996 - syn of: Calyptogena extenta (E.M. Krylova & L.I. Moskalev, 1996) - (KELLIELLIDAE)
- extenta, Natica extenta É.A.A. Locard, 1897 - syn of: Euspira subplicata (J.G. Jeffreys, 1885) - (NATICIDAE)
- extenta, Parthenina extenta Peñas & Rolán, 2017 - (PYRAMIDELLIDAE)
- extenta, Platyoptera extenta (T.A. Conrad in Wailes, 1854 †) - (ROSTELLARIIDAE) (FOSSIL)
- extenta, Policordia extenta I.N.V. Ivanova, 1977 - (VERTICORDIIDAE)
- extenta, Calyptogena extenta (E.M. Krylova & L.I. Moskalev, 1996) - (VESICOMYIDAE)
- extenta, Ectenagena extenta E.M. Krylova & L.I. Moskalev, 1996 - syn of: Calyptogena extenta (E.M. Krylova & L.I. Moskalev, 1996) - (VESICOMYIDAE)
- extentum, Trigonia extentum Repman, 1963 † - (TRIGONIIDAE) (FOSSIL)
- extenuata, Opisthoptera extenuata Ulrich, 1895 † - syn of: Opisthoptera alternata Ulrich, 1895 † - (AMBONYCHIIDAE) (FOSSIL)
- extenuata, Barrandicellopsis extenuata (J. Perner, 1903 †) - (ARCHINACELLIDAE) (FOSSIL)
- extenuata, Clathurella extenuata (W.H. Dall, 1927) - (CLATHURELLIDAE)
- extenuata, Corbula extenuata W.H. Dall, 1898 † - (CORBULIDAE) (FOSSIL)
- extenuata, Ovocerina extenuata (Barrande, 1865 †) - (MANDALOCERATIDAE) (FOSSIL)
- extenuata, Murchisonia extenuata J.W. Hall 1859 † - (MURCHISONIIDAE) (FOSSIL)
- extenuata, Propeleda extenuata (W.H. Dall, 1897) - (NUCULANIDAE)
- extenuata, Leda extenuata W.H. Dall, 1897 - syn of: Propeleda extenuata (W.H. Dall, 1897) - (NUCULANIDAE)
- extenuata, Nuculana extenuata W.H. Dall, 1897 - syn of: Propeleda extenuata (W.H. Dall, 1897) - (NUCULANIDAE)
- extenuata, Orthonychia extenuata J. Perner, 1903 † - syn of: Barrandicellopsis extenuata (J. Perner, 1903 †) - (ORTHONYCHIIDAE) (FOSSIL)
- extenuata, Odostomia extenuata A. Peñas & E. Rolán, 1999 - (PYRAMIDELLIDAE)
- extenuata, Philbertia extenuata W.H. Dall, 1927 - syn of: Clathurella extenuata (W.H. Dall, 1927) - (RAPHITOMIDAE)
- extenuata, Macoma extenuata W.H. Dall, 1900 - (TELLINIDAE)
- extenuata panamensis, Macoma extenuata panamensis W.H. Dall, 1900 - syn of: Macoma panamensis W.H. Dall, 1900 - (TELLINIDAE)
- extenuatum, Gomphoceras extenuatum Barrande, 1865 † - syn of: Ovocerina extenuata (Barrande, 1865 †) - (DIESTOCERATIDAE) (FOSSIL)
- extenuatum, Cancelloceras extenuatum Ruzhencev & Bogoslovskaya, 1978 † - (GASTRIOCERATIDAE) (FOSSIL)
- extenuatum, Uraloceras extenuatum Ruzhentsev, 1956 † - (PARAGASTRIOCERATIDAE) (FOSSIL)
- extenuatus, Conus extenuatus Tate, 1890 † - (CONIDAE) (FOSSIL)
- extenuatus, Planpyrgiscus extenuatus (J. Marwick, 1924) - (PYRAMIDELLIDAE)
- extenuatus, Technophorus extenuatus (Ulrich, 1894 †) - (TECHNOPHORIDAE) (FOSSIL)
- extenuatus, Austrocochlea extenuatus P. Fischer, 1876 - syn of: Austrocochlea porcata (A. Adams, 1853) - (TROCHIDAE)
- extenuicostata, Spiniscala extenuicostata M.E.A. de Boury, 1913 - syn of: Epitonium tenuicostatum (G.B. II Sowerby, 1844) - (EPITONIIDAE)
- extenuicostata, Epitonium extenuicostata M.E.A. de Boury, 1913 - syn of: Epitonium tenuicostatum (G.B. II Sowerby, 1844) - (EPITONIIDAE)
- exterebratus, Cenoceras exterebratus (Crick, 1898 †) - (CENOCERATIDAE) (FOSSIL)
- exterebratus, Nautilus exterebratus Crick, 1898 † - syn of: Cenoceras exterebratus (Crick, 1898 †) - (NAUTILIDAE) (FOSSIL)
- externecavatus, Cladiscites externecavatus Welter, 1914 † - (CLADISCITIDAE) (FOSSIL)
- externeplicatus, Cladiscites externeplicatus Mojsisovics, 1902 † - (CLADISCITIDAE) (FOSSIL)
- externiplicatus, Anatomites externiplicatus Mojsisovics, 1893 † - (HALORITIDAE) (FOSSIL)
- externnodosum, Strebliticeras externnodosum (Dorn, 1930 †) - (OPPELIIDAE) (FOSSIL)
- externum, Phragmoceras externum C.H. Blake, 1882 † - (PHRAGMOCERATIDAE) (FOSSIL)
- externus, Monodosus externus Rubio & Rolán, 2016 - (TORNIDAE)
- exterolaevis, Ervilia exterolaevis D.T. Dockery, 1982 † - (SEMELIDAE) (FOSSIL)
- extima, Isthmia extima (C.A. Westerlund, 1877) - (VERTIGINIDAE)
- extincta, Tornatellina extincta C.M.F. Ancey - syn of: Lamellidea gracilis (W.H. Pease, 1871) - (ACHATINELLIDAE)
- extincta, Amastra extincta L. Pfeiffer, 1856 - syn of: Amastra morticina A. Hyatt & H.A. Pilsbry, 1911 - (AMASTRIDAE)
- extincta, Leptachatina extincta L. Pfeiffer, 1856 - syn of: Amastra morticina A. Hyatt & H.A. Pilsbry, 1911 - (AMASTRIDAE)
- extincta, Pseudochloritis incrassata extincta (J.P. Rambur, 1862 †) - (ELONIDAE) (FOSSIL)
- extincta, Pseudolibera extincta A.F. Sartori, O. Gargominy & Fontaine, 2014 - (ENDODONTIDAE)
- extincta, Pleuropoma extincta (N.H. Odhner, 1917) - (HELICINIDAE)
- extincta, Penitella extincta J.T. Kuroda, 1946 - (PHOLADIDAE)
- extinctorium, Desmaulus extinctorium (J.B.P.A. Lamarck, 1822) - (CALYPTRAEIDAE)
- extinctorium, Calyptraea extinctorium H.M.D. de Blainville, 1825 † - syn of: Bicatillus renovata J.C.H. Crosse & Fischer, 1923 † - (CALYPTRAEIDAE) (FOSSIL)
- extinctorium, Calyptraea extinctorium J.B.P.A. Lamarck, 1822 - syn of: Desmaulus extinctorium (J.B.P.A. Lamarck, 1822) - (CALYPTRAEIDAE)
- extinctorium, Crucibulum extinctorium J.B.P.A. Lamarck, 1822 - syn of: Desmaulus extinctorium (J.B.P.A. Lamarck, 1822) - (CALYPTRAEIDAE)
- extinctorium morbida, Desmaulus extinctorium morbida (L.A. Reeve, 1859) - (CALYPTRAEIDAE)
- extinctum, Phalium extinctum J.H.F. Link, 1807 - syn of: Phalium areola (C. Linnaeus, 1758) - (CASSIDAE)
- extinctus, Cadomites extinctus (F.A. von Quenstedt †) - (STEPHANOCERATIDAE) (FOSSIL)
- Extra, Genus Extra F.P. Jousseaume, 1894 (CYSTISCIDAE)
- extra, Extra extra (F.P. Jousseaume, 1894) - (CYSTISCIDAE)
- extra, Marginella extra F.P. Jousseaume, 1894 - syn of: Extra extra (F.P. Jousseaume, 1894) - (MARGINELLIDAE)
- extra, Punctum belli extra T. Iredale, 1944 - (PUNCTIDAE)
- extracarinacostata, Ammonicera extracarinacostata W.J. Sleurs, 1985 - (OMALOGYRIDAE)
- Extractrix, Subgenus Trigonostoma (Extractrix) Korobkov, 1955 (CANCELLARIIDAE) (FOSSIL)
- Extractrix, syn of: Genus Trigonostoma H.M.D. De Blainville, 1825 (CANCELLARIIDAE)
- extralaevis, Ludwigia extralaevis (F.A. von Quenstedt †) - (GRAPHOCERATIDAE) (FOSSIL)
- extranea, Strophiops extranea C.J. Maynard, 1924 - (CERIONIDAE)
- extranea, Dosinia extranea (T. Iredale, 1937) - (VENERIDAE)
- extraneum, Vexillum extraneum G.P. Deshayes, 1865 † - (COSTELLARIIDAE) (FOSSIL)
- extraneus, Drymaeus extraneus F. Haas, 1955 - (BULIMULIDAE)
- extraneus, Torvamurex extraneus T. Iredale, 1936 - syn of: Chicoreus denudatus (G. Perry, 1811) - (MURICIDAE)
- extraneus, Visitator extraneus J. Perner, 1911 † - (PLATYCERATIDAE) (FOSSIL)
- extraneus, Streptartemon extraneus F. Haas, 1955 - (STREPTAXIDAE)
- Extranodites, Genus Extranodites Jeannet , 1951 (ASPIDOCERATIDAE) (FOSSIL)
- extraordinaria, Aplysia extraordinaria (J.K. Allan, 1932) - (APLYSIIDAE)
- extraordinarius, Trigonodus extraordinarius Jelen, 1989 † - (PACHYCARDIIDAE) (FOSSIL)
- extravaganta, Agardhiella extravaganta P. Subai, 2008 - (ARGNIDAE)
- extrema, Cerion extrema C.J. Maynard & W.F. Clapp, 1920 - (CERIONIDAE)
- extrema, Diaphana extrema K.H.J. Thiele, 1912 - syn of: Diaphana paessleri (H. Strebel, 1905) - (DIAPHANIDAE)
- extrema, Claraia extrema Spath, 1935 † - (PTERINOPECTINIDAE) (FOSSIL)
- extrema, Cirsonella extrema K.H.J. Thiele, 1912 - (SKENEIDAE)
- extrema, Vallonia extrema C.A. Westerlund, 1898 - syn of: Vallonia pulchella (O.F. Müller, 1774) - (VALLONIIDAE)
- extrema, Pseudaphrodina extrema Kalishevich, 1981 † - (VENERIDAE) (FOSSIL)
- extremalis, Unio extremalis A.V. Martynov & A. Tshernyshev, 1992 - syn of: Nodularia douglasiae (J.E. Gray in E. Griffith & E. Pidgeon, 1834) - (UNIONIDAE)
- extremis, Cochliopina extremis J.P.E. Morrison, 1946 - (COCHLIOPIDAE)
- extremis, Eulima extremis T.H. Aldrich, 1911 † - (EULIMIDAE) (FOSSIL)
- extremis, Sonneratia extremis Casey † - (HOPLITIDAE) (FOSSIL)
- extremitatis, Oreohelix yavapai extremitatis H.A. Pilsbry & J.H. Ferriss, 1911 - (OREOHELICIDAE)
- extremum, Glyptophiceras extremum Spath, 1935 † - syn of: Tompophiceras extremum (Spath, 1935 †) - (KASHMIRITIDAE) (FOSSIL)
- extremum, Tompophiceras extremum (Spath, 1935 †) - (XENODISCIDAE) (FOSSIL)
- extremus, Euflemingites extremus Smyshlyaeva & Zakharov, 2013 † - (FLEMINGITIDAE) (FOSSIL)
- extremus, Tylotrochus extremus Garvie, 2013 † - (PROCONULIDAE) (FOSSIL)
- extremus, Retites extremus Ruzhencev & Bogoslovskaya, 1978 † - (RETICULOCERATIDAE) (FOSSIL)
- extremus, Eurycephalites extremus Tornquist, 1898 † - (SPHAEROCERATIDAE) (FOSSIL)
- extrenuatus, Endemoconus extrenuatus (R. Tate, 1890 †) - (CONIDAE) (FOSSIL)
- extricarinata, Turritella extricarinata F. Sacco, 1895 - syn of: Turritella cingulata G.B. I Sowerby, 1825 - (TURRITELLIDAE)
- Extropharciceras, Genus Extropharciceras Bockwinkel & al., 2009 (PHARCICERATIDAE) (FOSSIL)
- extumida, Ambonychinia extumida Isberg, 1934 † - (AMBONYCHIIDAE) (FOSSIL)
- extumida, Heikea extumida Isberg, 1934 † - (CYRTODONTIDAE) (FOSSIL)
- extusdentata, Zonarina extusdentata (F. Sacco, 1894 †) - (CYPRAEIDAE) (FOSSIL)
- exuberans, Fissidentalium exuberans É.A.A. Locard, 1897 - syn of: Fissidentalium paucicostatum (R.B. Watson, 1879) - (DENTALIIDAE)
- exuberans, Chicoreus exuberans T. Cossignani, 2004 - syn of: Chicoreus bundharmai R. Houart, 1992 - (MURICIDAE)
- exuberans, Caracolus marginella exuberans (W.J. Clench & C.G. Aguayo, 1951) - (PLEURODONTIDAE)
- exul, Columbinia exul F.G. Thompson, 2008 - (CLAUSILIIDAE)
- exulans, Stereozaptyx exulans H.A. Pilsbry, 1908 - (CLAUSILIIDAE)
- exulans, Limatula exulans C.A. Fleming, 1978 † - (LIMIDAE) (FOSSIL)
- exulans, Amauropsis exulans A.A. Gould, 1841 - syn of: Amauropsis islandica (J.F. Gmelin, 1791) - (NATICIDAE)
- exulans, Leucosyrinx exulans (W.H. Dall, 1890) - (PSEUDOMELATOMIDAE)
- exulans, Pleurotoma exulans W.H. Dall, 1890 - syn of: Leucosyrinx exulans (W.H. Dall, 1890) - (TURRIDAE)
- exulata, Carditella exulata E.A. Smith, 1885 - (CONDYLOCARDIIDAE)
- exulata, Melanella exulata (E.A. Smith, 1915) - (EULIMIDAE)
- exulatus, Erycites exulatus P. Callomon & D.M. Chandler, 1994 † - syn of: Erycites barodiscus C. Gemmellaro, 1886 † - (HAMMATOCERATIDAE) (FOSSIL)
- exulatus, Nassarius exulatus (E.A. Smith, 1911) - (NASSARIIDAE)
- exulatus, Chilonopsis exulatus L.A. Reeve, 1852 - (SUBULINIDAE)
- exulcerata, Cerithium vulgatum exulcerata T.A. de M. Monterosato, 1917 - (CERITHIIDAE)
- exulta, Anadara exulta T. Iredale, 1939 - syn of: Anadara vellicata (L.A. Reeve, 1844) - (ARCIDAE)
- exulta, Terebra exulta T. Iredale, 1931 - syn of: Terebra punctatostriata J.E. Gray, 1834 - (TEREBRIDAE)
- exumaensis, Jaspidiconus exumaensis E.J. Petuch, 2013 - syn of: Conasprella jaspidea (J.F. Gmelin, 1791) - (CONIDAE)
- exumaensis, Opisthosiphon bahamiense exumaensis P. Bartsch, 1946 - (POMATIIDAE)
- exumense, Cerion exumense H.P. Plate, 1907 - (CERIONIDAE)
- exusta, Costellaria exusta P. Dautzenberg & J.L. Bouge, 1923 - syn of: Vexillum exasperatum (J.F. Gmelin, 1791) - (COSTELLARIIDAE)
- exusta, Talparia exusta (G.B. I Sowerby, 1832) - (CYPRAEIDAE)
- exusta, Cypraea exusta G.B. I Sowerby, 1832 - syn of: Talparia exusta (G.B. I Sowerby, 1832) - (CYPRAEIDAE)
- exusta, Scutellastra exusta (L.A. Reeve, 1854) - (PATELLIDAE)
- exusta, Patella exusta L.A. Reeve, 1854 - syn of: Scutellastra exusta (L.A. Reeve, 1854) - (PATELLIDAE)
- exusta, Atrina exusta (J.F. Gmelin, 1791) - (PINNIDAE)
- exusta, Elimia exusta E.L. Mihalcik & F.G. Thompson, 2002 - (PLEUROCERIDAE)
- exusta, Xenophora exusta L.A. Reeve, 1842 - syn of: Onustus exutus L.A. Reeve, 1842 - (XENOPHORIDAE)
- exusta pica, Scutellastra exusta pica (L.A. Reeve, 1854) - (PATELLIDAE)
- exustus, Brachidontes exustus (C. Linnaeus, 1758) - (MYTILIDAE)
- exustus, Indoplanorbis exustus (G.P. Deshayes, 1834) - (PLANORBIDAE)
- exustus, Strombus exustus W.J. Swainson, 1822 - syn of: Lentigo pipus (P.F. Röding, 1798) - (STROMBIDAE)
- exuta, Onoba exuta (A.W.B. Powell, 1937) - (RISSOIDAE)
- exutum, Xenophora exutum L.A. Reeve, 1843 - syn of: Onustus exutus L.A. Reeve, 1842 - (XENOPHORIDAE)
- exutus, Strombus exutus W.J. Swainson, 1822 - syn of: Lentigo pipus (P.F. Röding, 1798) - (STROMBIDAE)
- exutus, Onustus exutus L.A. Reeve, 1842 - (XENOPHORIDAE)
- exuvia, Nerita exuvia C. Linnaeus, 1758 - (NERITIDAE)
- exuviata, Crepidula exuviata L.A. Reeve, 1859 - syn of: Crepidula perforans (A. Valenciennes, 1846) - (CALYPTRAEIDAE)
- exuvioides, Theliostyla exuvioides C.T. Trechmann, 1935 † - (NERITIDAE) (FOSSIL)
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