Between brackets is the number of accepted species

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- Mollusca (133 306)
- Subphylum Aculifera
- Subphylum Conchifera
- Subphylum Placophora accepted as Polyplacophora
- Superclass Aplacophora
- Class Amphineura accepted as Aculifera
- Class Bivalvia (25 081)
- Class Caudofoveata (143)
- Class Cephalopoda (1 921)
- Class Conchifera accepted as Bivalvia
- Class Cricoconarida † (1)
- Class Gastropoda (103 047)
- Subclass Amphigastropoda † (434)
- Subclass Angiogastropoda represented as Gastropoda
- Subclass Apogastropoda
- Subclass Caenogastropoda (53 850)
- Subterclass Sorbeoconcha (147)
- Superorder Hypsogastropoda
- Order Architaenioglossa (4 921)
- Order Caenogastropoda incertae sedis (7 722)
- Order Littorinimorpha (17 232)
- Order Neogastropoda (23 828)
- Superfamily Buccinoidea Rafinesque, 1815 (5 270)
- Superfamily Cancellarioidea Forbes & Hanley, 1851 accepted as Volutoidea Rafinesque, 1815
- Superfamily Conoidea J. Fleming, 1822 (8 744)
- Superfamily Mitroidea Swainson, 1831 (634)
- Superfamily Muricacea accepted as Muricoidea Rafinesque, 1815
- Superfamily Muricoidea Rafinesque, 1815 (2 944)
- Superfamily Neogastropoda incertae sedis (1 151)
- Superfamily Olivoidea Latreille, 1825 (741)
- Superfamily Pholidotomoidea Cossmann, 1896 † (57)
- 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 (1 256)
- Superfamily Volutoidea Rafinesque, 1815 (3 031)
- Family Cystiscidae W. Stimpson, 1865 (557)
- Family Granulinidae G. A. Coovert & H. K. Coovert, 1995 (156)
- Family Marginellidae J. Fleming, 1828 (1 447)
- 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 (867)
- Subfamily Amoriinae J. E. Gray, 1857 (170)
- Subfamily Athletinae Pilsbry & Olsson, 1954 (105)
- 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 (64)
- Subfamily Volutilithinae Pilsbry & Olsson, 1954 † (21)
- Subfamily Volutinae Rafinesque, 1815 (154)
- Tribe Lyriini Pilsbry & Olsson, 1954 (126)
- Genus Callipara J. E. Gray, 1847 (10)
- Subgenus Callipara (Callipara) J. E. Gray, 1847 represented as Callipara J. E. Gray, 1847
- Subgenus Callipara (Canalilyria) Bail & Poppe, 2001 represented as Callipara J. E. Gray, 1847
- Subgenus Callipara (Festilyria) Pilsbry & Olsson, 1954 accepted as Festilyria Pilsbry & Olsson, 1954
- Subgenus Callipara (Simililyria) Bail & Poppe, 2001 accepted as Simililyria Bail & Poppe, 2001
- Species Callipara (Simililyria) aikeni J. H. Veldsman, 2012 accepted as Simililyria aikeni (J. H. Veldsman, 2012)
- Species Callipara (Simililyria) queketti (E. A. Smith, 1901) accepted as Simililyria queketti (E. A. Smith, 1901)
- Subspecies Callipara (Simililyria) queketti parkrynieensis J. H. Veldsman, 2012 accepted as Simililyria parkrynieensis (J. H. Veldsman, 2012)
- Subspecies Callipara (Simililyria) queketti queketti (E. A. Smith, 1901) accepted as Simililyria queketti (E. A. Smith, 1901)
- Species Callipara (Simililyria) veldsmani J. H. Veldsman, 2012 accepted as Simililyria veldsmani (J. H. Veldsman, 2012)
- Species Callipara (Simililyria) zululandensis J. H. Veldsman, 2012 accepted as Simililyria zululandensis (J. H. Veldsman, 2012)
- Species Callipara africana (Reeve, 1856)
- Species Callipara afrileviathan S. G. Veldsman & J. H. Veldsman, 2022
- Species Callipara aikeni J. H. Veldsman, 2012 accepted as Simililyria aikeni (J. H. Veldsman, 2012)
- Species Callipara aphrodite (Bondarev, 1999)
- Species Callipara beckeri (W. H. Turton, 1932)
- Species Callipara bullatiana C. S. Weaver & duPont, 1967
- Species Callipara casaana Childs, R. Aiken & Bail, 2020 accepted as Festilyria casaana (Childs, R. Aiken & Bail, 2020)
- Species Callipara duponti (C. S. Weaver, 1968) accepted as Festilyria duponti C. S. Weaver, 1968
- Species Callipara festiva (Lamarck, 1811) accepted as Festilyria festiva (Lamarck, 1811)
- Species Callipara kurodai (Kawamura, 1964)
- Species Callipara ponsonbyi (E. A. Smith, 1901) accepted as Festilyria ponsonbyi (E. A. Smith, 1901)
- Species Callipara pumila Bail & R. Aiken, 2017
- Species Callipara queketti (E. A. Smith, 1901) accepted as Simililyria queketti (E. A. Smith, 1901)
- Species Callipara rietensis (W. H. Turton, 1933)
- Species Callipara susmanae S. G. Veldsman & J. H. Veldsman, 2022
- Species Callipara transkeiensis S. G. Veldsman & J. H. Veldsman, 2022
- Species Callipara veldsmani J. H. Veldsman, 2012 accepted as Simililyria veldsmani (J. H. Veldsman, 2012)
- Species Callipara victoriae Childs, R. Aiken & Bail, 2020 accepted as Festilyria victoriae (Childs, R. Aiken & Bail, 2020)
- Species Callipara zululandensis J. H. Veldsman, 2012 accepted as Simililyria zululandensis (J. H. Veldsman, 2012)
- Genus Dallivoluta Okutani, 1982 accepted as Lyria J. E. Gray, 1847
- Genus Enaeta H. Adams & A. Adams, 1853 (11)
- Genus Falsilyria Pilsbry & Olsson, 1954 † (1)
- Genus Festilyria Pilsbry & Olsson, 1954 (5)
- Genus Harpella Gray, 1858 accepted as Lyria J. E. Gray, 1847
- Genus Harpeola Dall, 1907 accepted as Lyria J. E. Gray, 1847
- Genus Harpulina Dall, 1906 (3)
- Genus Indolyria Bail & Poppe, 2001 accepted as Lyria (Indolyria) Bail & Poppe, 2001
- Genus Leptoscapha P. Fischer, 1883 † (3)
- Genus Lyreneta Iredale, 1937 accepted as Lyria J. E. Gray, 1847
- Genus Lyria J. E. Gray, 1847 (82)
- Genus Lyriopsis Merle & Pacaud, 2014 † (1)
- Genus Mitraelyria Bail & Poppe, 2001 accepted as Lyria (Mitraelyria) Bail & Poppe, 2001
- Genus Otocheilus Conrad, 1865 † accepted as Lyria J. E. Gray, 1847
- Genus Plicolyria Bail & Poppe, 2001 accepted as Lyria (Plicolyria) Bail & Poppe, 2001
- Genus Pseudolyria K. Martin, 1931 † accepted as Lyria J. E. Gray, 1847
- Genus Sannalyria Pilsbry & Olsson, 1954 † accepted as Lyria J. E. Gray, 1847
- Genus Simililyria Bail & Poppe, 2001 (10)
- Genus Similyria [sic] accepted as Simililyria Bail & Poppe, 2001
- Tribe Volutini Rafinesque, 1815 (28)
- 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 (313)
- Subclass Heterobranchia (39 231)
- Subclass Neomphaliones accepted as Vetigastropoda
- Subclass Neritimorpha (1 916)
- Subclass Orthogastropoda represented as Gastropoda
- Subclass Patellogastropoda (514)
- Subclass Prosobranchia
- Subclass Psilogastropoda represented as Gastropoda
- Subclass Vetigastropoda (6 789)
- 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 (1 381)
- Class Polyplaxiphora accepted as Polyplacophora
- Class Rostroconchia † (64)
- Class Scaphopoda (754)
- Class Solenoconchia accepted as Scaphopoda
- Class Solenogastres (313)
- Subclass Chaetodermomorpha accepted as Caudofoveata