Between brackets is the number of accepted species

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- Mollusca (132 791)
- Subphylum Aculifera
- Subphylum Conchifera
- Subphylum Placophora accepted as Polyplacophora
- Superclass Aplacophora
- Class Amphineura accepted as Aculifera
- Class Bivalvia (25 009)
- Class Caudofoveata (143)
- Class Cephalopoda (1 834)
- Class Conchifera accepted as Bivalvia
- Class Cricoconarida † (1)
- Class Gastropoda (102 697)
- Subclass Amphigastropoda † (390)
- Subclass Angiogastropoda represented as Gastropoda
- Subclass Apogastropoda
- Subclass Caenogastropoda (53 636)
- Subterclass Sorbeoconcha (147)
- Superorder Hypsogastropoda
- Order Architaenioglossa (4 918)
- Order Caenogastropoda incertae sedis (7 676)
- Order Littorinimorpha (17 179)
- Order Neogastropoda (23 716)
- Superfamily Buccinoidea Rafinesque, 1815 (5 253)
- Superfamily Cancellarioidea Forbes & Hanley, 1851 accepted as Volutoidea Rafinesque, 1815
- Superfamily Conoidea J. Fleming, 1822 (8 674)
- Superfamily Mitroidea Swainson, 1831 (633)
- Superfamily Muricacea accepted as Muricoidea Rafinesque, 1815
- Superfamily Muricoidea Rafinesque, 1815 (2 940)
- Superfamily Neogastropoda incertae sedis (296)
- Superfamily Olivoidea Latreille, 1825 (740)
- Superfamily Pholidotomoidea Cossmann, 1896 † (55)
- Superfamily Pseudolivoidea De Gregorio, 1880 accepted as Olivoidea Latreille, 1825
- Superfamily Pyrifusoidea Bandel & Dockery, 2001 † accepted as Pholidotomoidea Cossmann, 1896 †
- Superfamily Sarganoidea Stephenson, 1923 † accepted as Pholidotomoidea Cossmann, 1896 †
- Superfamily Toxoglossa Troschel, 1848 accepted as Conoidea J. Fleming, 1822
- Superfamily Turbinelloidea Swainson, 1835 (1 252)
- Superfamily Volutoidea Rafinesque, 1815 (3 873)
- Family Cancellariidae Forbes & Hanley, 1851 (855)
- Family Cystiscidae W. Stimpson, 1865 (552)
- Family Granulinidae G. A. Coovert & H. K. Coovert, 1995 (152)
- Family Marginellidae J. Fleming, 1828 (1 444)
- Family Marginellonidae Coan, 1965 (4)
- Family Paladmetidae Stephenson, 1941 † accepted as Admetinae Troschel, 1865
- Family Plesiocystiscidae G. A. Coovert & H. K. Coovert, 1995 accepted as Plesiocystiscinae G. A. Coovert & H. K. Coovert, 1995
- Family Volutidae Rafinesque, 1815 (866)
- Subfamily Amoriinae J. E. Gray, 1857 (170)
- Subfamily Athletinae Pilsbry & Olsson, 1954 (105)
- Genus Afriathleta S. G. Veldsman & J. H. Veldsman, 2022 accepted as Athleta (Neoathleta) Sacco, 1890 † (7)
- Genus Athleta Conrad, 1853 (63)
- Subgenus Athleta (Athleta) Conrad, 1853 represented as Athleta Conrad, 1853
- Subgenus Athleta (Boncavailia) Roman & Mazeran, 1920 † accepted as Boncavailia Roman & Mazeran, 1920 †
- Subgenus Athleta (Neoathleta) Sacco, 1890 † represented as Athleta Conrad, 1853
- Subgenus Athleta (Oligoathleta) Lozouet, 2019 † represented as Athleta Conrad, 1853
- Subgenus Athleta (Ternivoluta) E. von Martens, 1897 accepted as Ternivoluta E. von Martens, 1897
- Subgenus Athleta (Volutocorbis) Dall, 1890 † represented as Athleta Conrad, 1853
- Subgenus Athleta (Volutopupa) Dall, 1890 † represented as Athleta Conrad, 1853
- Subgenus Athleta (Volutospina) R. B. Newton, 1906 † represented as Athleta Conrad, 1853
- Species Athleta abyssicola (A. Adams & Reeve, 1848) accepted as Capensisvoluta abyssicola (A. Adams & Reeve, 1848)
- Species Athleta acutinodula Belliard & Gain, 2025 †
- Species Athleta affinis (Brocchi, 1814) †
- Species Athleta ambiguus (Solander, 1766) †
- Species Athleta anticingulata (F. McCoy, 1866) † accepted as Athleta anticingulata anticingulata (F. McCoy, 1866) †
- Species Athleta antiscalaris (F. McCoy, 1866) † accepted as Ternivoluta antiscalaris (F. McCoy, 1866) †
- Species Athleta antispinosa (Tate, 1899) † accepted as Ternivoluta antispinosa (Tate, 1899) †
- Species Athleta athleta (Solander, 1766) †
- Species Athleta baili Pacaud & Ledon, 2023 †
- Species Athleta barrandii (Deshayes, 1865) †
- Species Athleta bicorona (Lamarck, 1803) †
- Species Athleta blanfordi Vredenburg, 1923 † accepted as Lyrischapa blanfordi (Vredenburg, 1923) †
- Species Athleta boswellae (Rehder, 1969) accepted as Capensisvoluta boswellae (Rehder, 1969)
- Species Athleta bulbulus (Lamarck, 1803) †
- Species Athleta bungae Darragh, 1971 † accepted as Ternivoluta bungae (Darragh, 1971) †
- Species Athleta burtoni Vredenburg, 1923 †
- Species Athleta canaligera Staadt, 1913 †
- Species Athleta citharoedus (Holten, 1802) †
- Species Athleta citharopsis Merle & Pacaud, 2014 †
- Species Athleta crenulifer (Bayan, 1870) †
- Species Athleta curvicostata Darragh, 1971 † accepted as Ternivoluta curvicostata (Darragh, 1971) †
- Species Athleta delvallei Astibia, Merle & Pacaud, 2018 †
- Species Athleta depauperatus (J. De C. Sowerby, 1823) †
- Species Athleta depressus (Lamarck, 1803) †
- Species Athleta digitalinus (Lamarck, 1810) †
- Species Athleta disparilis (Rehder, 1969) accepted as Capensisvoluta disparilis (Rehder, 1969)
- Species Athleta easoni Petuch & Berschauer, 2017 accepted as Capensisvoluta easoni (Petuch & Berschauer, 2017)
- Species Athleta elevatus (J. De C. Sowerby, 1840) †
- Species Athleta emmanuelae (Rosso, 1985) accepted as Capensisvoluta emmanuelae (Rosso, 1985)
- Species Athleta epigona (E. von Martens, 1904) accepted as Afriathleta epigona (E. von Martens, 1904)
- Species Athleta eugeniae Vredenburg, 1923 †
- Species Athleta fabri (Deshayes, 1866) †
- Species Athleta ficulina (Lamarck, 1811) †
- Species Athleta fournigaulti Belliard & Gain, 2025 †
- Species Athleta gabriellis (Benoist, 1874) †
- Species Athleta gandilloti (Chavan, 1941) †
- Species Athleta gandilloti Chavan, 1941 † accepted as Athleta gandilloti (Chavan, 1941) †
- Species Athleta gilchristi (G. B. Sowerby III, 1902) accepted as Nataliavoluta gilchristi (G. B. Sowerby III, 1902)
- Species Athleta glabrata (Kilburn, 1971) accepted as Nataliavoluta glabrata (Kilburn, 1971)
- Species Athleta haueri (M. Hörnes, 1852) †
- Species Athleta insperata Darragh, 1979 accepted as Ternivoluta insperata (Darragh, 1979)
- Species Athleta intercrenatus (Cossmann & Pissarro, 1909) †
- Species Athleta kilburni (Rehder, 1974) accepted as Afriathleta kilburni (Rehder, 1974)
- Species Athleta labrellus (Lamarck, 1803) †
- Species Athleta lasharii Merle & Pacaud, 2014 †
- Species Athleta lata (Marwick, 1926) †
- Species Athleta lineolatus (Deshayes, 1835) †
- Species Athleta listerarum Le Renard, 1994 †
- Species Athleta ludensis Périer, 1941 †
- Species Athleta lutosa (H. J. Koch, 1948) accepted as Capensisvoluta lutosa (H. J. Koch, 1948)
- Species Athleta lyra (Lamarck, 1803) †
- Species Athleta maculosus Lozouet, 2019 †
- Species Athleta magister (Kilburn, 1980)
- Species Athleta marocanus Moret, 1938 †
- Species Athleta marwicki P. A. Maxwell, 2003 †
- Species Athleta massieri Petuch & Berschauer, 2017 accepted as Capensisvoluta massieri (Petuch & Berschauer, 2017)
- Species Athleta memoirae Lozouet, 2019 †
- Species Athleta mimica P. A. Maxwell, 2003 †
- Species Athleta monstrosus (J. Sowerby, 1816) †
- Species Athleta mozambicana (Rehder, 1972) accepted as Nataliavoluta mozambicana (Rehder, 1972)
- Species Athleta mutatus (Deshayes, 1835) †
- Species Athleta nana (Rehder, 1974) accepted as Nataliavoluta nana (Rehder, 1974)
- Species Athleta necopinata Suter, 1917 †
- Species Athleta nicklesi (Rosso, 1976) accepted as Capensisvoluta nicklesi (Rosso, 1976)
- Species Athleta nikolaji Schnetler & M. S. Nielsen, 2018 †
- Species Athleta noetlingi (Cossmann & Pissarro, 1909) †
- Species Athleta permulticostatus (Telegdi-Roth, 1914) †
- Species Athleta peyreirensis Lozouet, 2019 †
- Species Athleta pisororum H. Morrison, 2006 accepted as Ternivoluta pisororum (H. Morrison, 2006)
- Species Athleta pseudolyra (A. d'Orbigny, 1850) †
- Species Athleta rarispina (Lamarck, 1811) † accepted as Athleta ficulina (Lamarck, 1811) †
- Species Athleta rathieri (Hébert, 1849) †
- Species Athleta rosavittoriae (Rehder, 1981) accepted as Afriathleta rosavittoriae (Rehder, 1981)
- Species Athleta scalaris (J. De C. Sowerby, 1843) †
- Species Athleta semirugata (Rehder & C. S. Weaver, 1974) accepted as Afriathleta semirugata (Rehder & C. S. Weaver, 1974)
- Species Athleta spinicosta Glibert, 1938 †
- Species Athleta spinosa (Linnaeus, 1758) † accepted as Athleta spinosus (Linnaeus, 1758) †
- Species Athleta spinosus (Linnaeus, 1758) †
- Species Athleta strombiformis (Deshayes, 1835) †
- Species Athleta studeri (E. von Martens, 1897) accepted as Ternivoluta studeri (E. von Martens, 1897)
- Species Athleta subaffinis (A. d'Orbigny, 1852) †
- Species Athleta subambiguus (A. d'Orbigny, 1852) †
- Species Athleta subcrenulifera Darragh, 1971 † accepted as Ternivoluta subcrenulifera (Darragh, 1971) †
- Species Athleta subelegans (A. d'Orbigny, 1852) †
- Species Athleta subinflatus (Moret, 1938) †
- Species Athleta suspensus (Solander, 1766) †
- Species Athleta taikoensis P. A. Maxwell, 2003 †
- Species Athleta telegdyi (Gaál, 1938) †
- Species Athleta tournoueri (Peyrot, 1928) †
- Species Athleta trisulcatus (Deshayes, 1835) †
- Species Athleta wangerrip Darragh, 1971 †
- Species Athleta wynnei L. R. Cox, 1930 †
- Genus Austrovoluta Cotton, 1949 † accepted as Ternivoluta E. von Martens, 1897
- Genus Capensisvoluta S. G. Veldsman & J. H. Veldsman, 2022 (13)
- Genus Konistra Saul & Popenoe, 1993 † (1)
- Genus Nataliavoluta S. G. Veldsman & J. H. Veldsman, 2022 (6)
- Genus Notoplejona Marwick, 1926 † accepted as Athleta Conrad, 1853
- Genus Ternivoluta E. von Martens, 1897 (11)
- Genus Volutocorbis Dall, 1890 † accepted as Athleta (Volutocorbis) Dall, 1890 † (3)
- Genus Volutospina R. B. Newton, 1906 accepted as Athleta (Volutospina) R. B. Newton, 1906 †
- Genus Volutovetus Pilsbry & Olsson, 1954 † (1)
- Subfamily Calliotectinae Pilsbry & Olsson, 1954 (22)
- Subfamily Cymbiinae H. Adams & A. Adams, 1853 (1847) (236)
- Subfamily Cymbiolinae Bondarev, 1995 accepted as Melonini Pilsbry & Olsson, 1954
- Subfamily Eovolutinae Pacaud, 2016 † (25)
- Subfamily Fulgorariinae Pilsbry & Olsson, 1954 (57)
- Subfamily Indovolutinae Halder & S. S. Das, 2019 † (11)
- Subfamily Plicolivinae Bouchet, 1990 (2)
- Subfamily Scaphellinae Gray, 1857 (63)
- Subfamily Volutilithinae Pilsbry & Olsson, 1954 † (21)
- Subfamily Volutinae Rafinesque, 1815 (154)
- Subfamily Volutomitrinae J. E. Gray, 1854 accepted as Volutomitridae J. E. Gray, 1854
- Subfamily Zidoninae H. Adams & A. Adams, 1853 accepted as Zidonini H. Adams & A. Adams, 1853
- Genus Rostellites Conrad, 1855 †
- Genus Tectaplica Wade, 1916 †
- Order Stenoglossa accepted as Neogastropoda
- Subclass Gastropoda incertae sedis (308)
- Subclass Heterobranchia (39 156)
- Subclass Neomphaliones accepted as Vetigastropoda
- Subclass Neritimorpha (1 914)
- Subclass Orthogastropoda represented as Gastropoda
- Subclass Patellogastropoda (511)
- Subclass Prosobranchia
- Subclass Psilogastropoda represented as Gastropoda
- Subclass Vetigastropoda (6 782)
- Class Lamellibranchiata accepted as Bivalvia
- Class Loricata accepted as Polyplacophora
- Class Mollusca incertae sedis † (372)
- Class Monoplacophora (229)
- Class Pelecypoda accepted as Bivalvia
- Class Polyplacophora (1 377)
- Class Polyplaxiphora accepted as Polyplacophora
- Class Rostroconchia † (64)
- Class Scaphopoda (752)
- Class Solenoconchia accepted as Scaphopoda
- Class Solenogastres (313)
- Subclass Chaetodermomorpha accepted as Caudofoveata