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)
- Subfamily Austroginellinae G. A. Coovert & H. K. Coovert, 1995 (204)
- Genus Alaginella Laseron, 1957 (26)
- Species Alaginella aikeni Lussi, 2013
- Species Alaginella albino Laseron, 1957
- Species Alaginella aldingae (Tate, 1878) †
- Species Alaginella atractus (Tomlin, 1918)
- Species Alaginella aupouria (A. W. B. Powell, 1937) accepted as Mesoginella aupouria (A. W. B. Powell, 1937)
- Species Alaginella borda (Cotton, 1944)
- Species Alaginella brazieri (E. A. Smith, 1891)
- Species Alaginella carinata (E. A. Smith, 1891)
- Species Alaginella charma (Cotton, 1949) †
- Species Alaginella clara (Thiele, 1925) accepted as Dentimargo clara (Thiele, 1925)
- Species Alaginella clisia (Cotton, 1949) † accepted as Mesoginella clisia (Cotton, 1949) †
- Species Alaginella cottoni F. Boyer, 2001
- Species Alaginella fraudulenta (Suter, 1917) †
- Species Alaginella gatliffi (May, 1911)
- Species Alaginella geminata (Hedley, 1912)
- Species Alaginella julia (Thiele, 1925) accepted as Alaginella atractus (Tomlin, 1918)
- Species Alaginella kerochuta (Shackleford, 1914)
- Species Alaginella labinensis (P. A. Maxwell, 1988) †
- Species Alaginella laeviplicata (Laseron, 1948) accepted as Alaginella ochracea (Angas, 1871)
- Species Alaginella malina (Hedley, 1915)
- Species Alaginella ochracea (Angas, 1871)
- Species Alaginella pachia (R. B. Watson, 1886)
- Species Alaginella palla (Cotton, 1949) †
- Species Alaginella parvisinus (P. A. Maxwell, 1992) †
- Species Alaginella pemphix (B. Roth, 1973)
- Species Alaginella pygmora Laseron, 1957
- Species Alaginella sica (Cotton, 1949) accepted as Alaginella vercoi (May, 1911)
- Species Alaginella totangiensis (Marwick, 1931) †
- Species Alaginella umlaasensis (Lussi & G. Smith, 1996) accepted as Volvarina umlaasensis Lussi & G. Smith, 1996
- Species Alaginella valida (R. B. Watson, 1886)
- Species Alaginella vercoi (May, 1911)
- Species Alaginella waikohuensis (Marwick, 1931) †
- Species Alaginella zeyheri (Krauss, 1852)
- Genus Austroginella Laseron, 1957 (12)
- Genus Carinaginella Laseron, 1957 accepted as Alaginella Laseron, 1957
- Genus Cassoginella Laseron, 1957 † accepted as Alaginella Laseron, 1957
- Genus Conuginella Laseron, 1957 † (1)
- Genus Deviginella Laseron, 1957 accepted as Mesoginella Laseron, 1957
- Genus Exiginella Laseron, 1957 † accepted as Serrata Jousseaume, 1875
- Genus Haloginella Laseron, 1957 accepted as Serrata Jousseaume, 1875
- Genus Hydroginella Laseron, 1957 (33)
- Genus Marigordiella Espinosa & Ortea, 2010 (1)
- Genus Mesoginella Laseron, 1957 (41)
- Genus Mioginella Laseron, 1957 † (2)
- Genus Neptoginella Laseron, 1957 accepted as Hydroginella Laseron, 1957
- Genus Ovaginella Laseron, 1957 (6)
- Genus Pillarginella Gabriel, 1962 accepted as Hydroginella Laseron, 1957
- Genus Plicaginella Laseron, 1957 accepted as Austroginella Laseron, 1957
- Genus Protoginella Laseron, 1957 (17)
- Genus Serrata Jousseaume, 1875 (63)
- Genus Serrataginella G. A. Coovert & H. K. Coovert, 1995 accepted as Serrata Jousseaume, 1875
- Genus Sinuginella Laseron, 1957 accepted as Mesoginella Laseron, 1957
- Genus Spiroginella Laseron, 1957 accepted as Mesoginella Laseron, 1957
- Genus Stromboginella Laseron, 1957 † (2)
- Genus Triginella Laseron, 1957 accepted as Alaginella Laseron, 1957
- Genus Urniginella Laseron, 1957 † accepted as Mesoginella Laseron, 1957
- Subfamily Granulininae G. A. Coovert & H. K. Coovert, 1995 accepted as Granulinidae G. A. Coovert & H. K. Coovert, 1995
- Subfamily Marginellidae incertae sedis (22)
- Subfamily Marginellinae J. Fleming, 1828 (979)
- Subfamily Marginelloninae Coan, 1965 accepted as Marginellonidae Coan, 1965
- Subfamily Pruninae G. A. Coovert & H. K. Coovert, 1995 (234)
- Genus Hianoginella Laseron, 1957 accepted as Mesoginella Laseron, 1957
- Genus Janaginella T. Cossignani & Lorenz, 2021 (4)
- Genus Luciaginella Espinosa, Ortea & Pina Amargós, 2024 (1)
- 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)
- 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