"Lower Heterobranchia"
[non-Uristidae] (temporary name )
[non-Uristidae] dawsoni Hurley, 1963
[non-Uristidae] georgianus (Schellenberg, 1931)
[unassigned] Abyssochrysoidea (temporary name )
[unassigned] Buccinidae (temporary name )
[unassigned] Buccinoidea (temporary name )
[unassigned] Caenogastropoda (temporary name )
[unassigned] Cardiidae (temporary name )
[unassigned] Cephalaspidea (temporary name )
[unassigned] Cladobranchia (temporary name )
[unassigned] Conoidea (temporary name )
[unassigned] Decapodiformes (temporary name )
[unassigned] Enteropneusta (temporary name )
[unassigned] Euheterodonta (temporary name )
[unassigned] Euthyneura (temporary name )
[unassigned] Heterobranchia (temporary name )
[unassigned] Muricidae (temporary name )
[unassigned] Neogastropoda (temporary name )
[unassigned] Neomphaloidea (temporary name )
[unassigned] Oegopsida (temporary name )
[unassigned] Seguenziidae (temporary name )
[unassigned] Seguenzioidea (temporary name )
[unassigned] Stylommatophora (temporary name )
[unassigned] Trochidae (temporary name )
[unassigned] Vetigastropoda (temporary name )
[unassigned] Gadilida (temporary name )
[unassigned] Mytilidae (temporary name )
[unassigned] Pectinidae (temporary name )
“Montereina” sensu Dayrat, 2010 (unaccepted > unavailable name )
“Montereina” achroma (Á. Valdés, 2001) represented as Discodoris achroma Á. Valdés, 2001
Aaptolasma Newman & Ross, 1971 accepted as Hexelasma Hoek, 1913
Aaptolasma americanum (Pilsbry, 1916) accepted as Hexelasma americanum Pilsbry, 1916
Aaptolasma triderma Newman & Ross, 1971 accepted as Hexelasma triderma (Newman & Ross, 1971)
Aaptos Gray, 1867
Aaptos robustus Plotkin & Janussen, 2008
Abalistes Jordan & Seale, 1906
Abalistes stellaris (Bloch & Schneider, 1801) accepted as Abalistes stellatus (Anonymous, 1798)
Abalistes stellatus (Anonymous, 1798)
Abatus Troschel, 1851
Abatus (Pseudabatus) Koehler, 1911
Abatus (Pseudabatus) nimrodi (Koehler, 1911)
Abatus agassizii Mortensen, 1910
Abatus beatriceae (Larrain, 1986)
Abatus cavernosus (Philippi, 1845)
Abatus cordatus (Verrill, 1876)
Abatus curvidens Mortensen, 1936
Abatus elongatus (Koehler, 1908) accepted as Abatus koehleri (Thiéry, 1909)
Abatus ingens Koehler, 1926
Abatus koehleri (Thiéry, 1909)
Abatus nimrodi (Koehler, 1911) accepted as Pseudabatus nimrodi Koehler, 1911 accepted as Abatus (Pseudabatus) nimrodi (Koehler, 1911)
Abatus philippii Lovén, 1871
Abatus shackletoni Koehler, 1911
Abderos Schüller & Jirkov, 2013
Abderos minotaurus Schüller & Jirkov, 2013
Abditoconus Voight, 2019
Abditoconus anselli (Harvey, 1996)
Abditoconus brava (Romano, Pérez-Portela & D. Martin, 2014)
Abditoconus heterosiphon (Voight, 2007)
Abditodentrix Patterson, 1985
Abditodentrix asketocomptella Patterson, 1985 accepted as Abditodentrix pseudothalmanni (Boltovskoy & Guissani de Kahn, 1981)
Abditodentrix pseudothalmanni (Boltovskoy & Guissani de Kahn, 1981)
Aberratylus Bousfield & Kendall, 1994
Aberratylus aberrantis (J.L. Barnard, 1962)
Aberrodomus Gordon, 1988
Aberrodomus candidus Gordon, 1988
Abietinaria Kirchenpauer, 1884
Abietinaria abietina (Linnaeus, 1758)
Abietinaria anguina (Trask, 1857)
Abietinaria costata (Nutting, 1901) accepted as Abietinaria inconstans (Clark, 1877)
Abietinaria filicula (Ellis & Solander, 1786)
Abietinaria gracilis Nutting, 1904
Abietinaria inconstans (Clark, 1877)
Abietinella Levinsen, 1913
Abietinella operculata (Jäderholm, 1903)
Ablennes Jordan & Fordice, 1887
Ablennes hians (Valenciennes, 1846)
Abludomelita Karaman, 1981
Abludomelita richardi (Chevreux, 1900)
Abludomelita sexstachya (Gamo, 1977) accepted as Quasimelita sexstachya (Gamo, 1977)
Abos Rubtzov, 1980 accepted as Benthimermis Petter, 1980 accepted as Trophomera Rubtzov & Platonova, 1974
Abos bathycola Rubtzov, 1980 accepted as Benthimermis bathycola (Rubtzov, 1980) Chesunov, 1997 accepted as Trophomera bathycola (Rubtzov, 1980) Miljutin, 2004
Abra Lamarck, 1818
Abra braziliensis (E. A. Smith, 1885)
Abra demosia (Dautzenberg & H. Fischer, 1906)
Abra lioica (Dall, 1881)
Abra longicallis (R. A. Philippi, 1844) accepted as Abra longicallus (Scacchi, 1835)
Abra longicallis var. americana Verrill & K. J. Bush, 1898 accepted as Abra longicallus (Scacchi, 1835)
Abra longicallus (Scacchi, 1835)
Abra longicallus americana Verrill & K. J. Bush, 1898 accepted as Abra longicallus (Scacchi, 1835)
Abra maxima (G. B. Sowerby III, 1894) accepted as Abra philippinensis (E. A. Smith, 1885)
Abra nitida (O. F. Müller, 1776)
Abra philippinensis (E. A. Smith, 1885)
Abra profundorum (E. A. Smith, 1885)
Abra profundorum japonicum Okutani, 1975 accepted as Abra profundorum (E. A. Smith, 1885)
Abra sibogai Prashad, 1932
Abralia Gray, 1849
Abralia (Abralia) Gray, 1849 represented as Abralia Gray, 1849
Abralia (Abralia) armata (Quoy & Gaimard, 1832) represented as Abralia armata (Quoy & Gaimard, 1832)
Abralia (Asteroteuthis) Pfeffer, 1908 represented as Abralia Gray, 1849