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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)
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)
Order Anisobranchia accepted as Trochidae Rafinesque, 1815
Order Cocculinida (69)
Order Lepetellida (1 205)
Order Neomphalida (63)
Order Pleurotomariida (695)
Superfamily Eotomarioidea Wenz, 1938 † accepted as Porcellioidea Zittel, 1895 †
Superfamily Murchisonioidea Koken, 1896 † (33)
Superfamily Pleurotomariacea Swainson, 1840 accepted as Pleurotomarioidea Swainson, 1840
Superfamily Pleurotomarioidea Swainson, 1840 (271)
Family Catantostomatidae Wenz, 1938 †
Family Kittlidiscidae L. R. Cox, 1960 † (6)
Family Phymatopleuridae Batten, 1956 † (68)
Family Pleurotomariidae Swainson, 1840 (175)
Subfamily Pleurotomariinae Swainson, 1840 accepted as Pleurotomariidae Swainson, 1840
Genus Anodomaria J. Szabó, 1980 † (1)
Genus Bathrotomaria L. R. Cox, 1956 † (21)
Genus Bayerotrochus Harasewych, 2002 (19)
Genus Bouchetitrochus Harasewych, P. Anseeuw, Zuccon & Puillandre, 2023 (5)
Genus Chelotia P. Fischer, 1885 † (3)
Genus Conotomaria L. R. Cox, 1959 † (13)
Genus Cyclostomaria J. Szabó, 1980 † (1)
Genus Echetus Koken, 1896 † accepted as Eymarella Cossmann, 1897 †
Genus Entemnotrochus P. Fischer, 1885 (7)
Genus Euryzone Koken, 1896 † (1)
Genus Eymarella Cossmann, 1897 † (1)
Genus Granulizona J. Szabó, 2017 † (1)
Genus Jumaramaria J. Szabó & Jaitly, 2019 † (1)
Genus Laevitomaria M. A. Conti & J. Szabó, 1987 † (2)
Genus Leptomaria Eudes-Deslongchamps, 1865 † (14)
Genus Mamoea Begg & Grant-Mackie, 2003 † accepted as Mamoeatomaria Begg & Grant-Mackie, 2006 †
Genus Mamoeatomaria Begg & Grant-Mackie, 2006 † (1)
Genus Mikadotrochus Lindholm, 1927 (5)
Species Mikadotrochus amabilis Bayer, 1963 accepted as Perotrochus amabilis (Bayer, 1963)
Species Mikadotrochus bassi (Pritchard, 1903) † accepted as Perotrochus bassi (Pritchard, 1903) †
Species Mikadotrochus beyrichii (Hilgendorf, 1877)
Species Mikadotrochus caledonicus (Bouchet & Métivier, 1982) accepted as Bouchetitrochus caledonicus (Bouchet & Métivier, 1982)
Species Mikadotrochus gotoi (P. Anseeuw, 1990) accepted as Bouchetitrochus gotoi (P. Anseeuw, 1990)
Species Mikadotrochus hirasei (Pilsbry, 1903)
Species Mikadotrochus nantouensis C. C. Lin, 1975 †
Species Mikadotrochus oishii Shikama, 1973 accepted as Perotrochus oishii (Shikama, 1973)
Species Mikadotrochus salmianus (Rolle, 1899)
Species Mikadotrochus schmalzi Shikama, 1961 accepted as Mikadotrochus salmianus (Rolle, 1899)
Species Mikadotrochus vicdani (Kosuge, 1980)
Genus Montospira W. G. H. Maxwell, 1964 † (1)
Genus Mourlonopsis Fletcher, 1958 † (1)
Genus Murihikua Begg & Grant-Mackie, 2003 † (3)
Genus Neoplatyteichum W. G. H. Maxwell, 1964 † (1)
Genus Neorotomaria J. Szabó, 2017 † (2)
Genus Obornella L. R. Cox, 1959 † (2)
Genus Ornatospira Pan H.-Z., 1982 † (1)
Genus Pagodispira Grabau, 1922 †
Genus Pareuryalox O. Haas, 1953 † (1)
Genus Perotrochus P. Fischer, 1885 (16)
Genus Platyteichum K. S. W. Campbell, 1953 † (1)
Genus Pleurotomaria Defrance, 1826 † (26)
Genus Pleurotomarium Blainville, 1825 † accepted as Pleurotomaria Defrance, 1826 †
Genus Polyelasma Cossman, 1897 † accepted as Euzone Koken, 1896 †
Genus Pyrgotrochus P. Fischer, 1885 † (7)
Genus Rasatomaria Pieroni & Nützel, 2014 † (2)
Genus Sagana Koken, 1896 † accepted as Euryalox Cossmann, 1897 †
Genus Szabotomaria Monari, Gatto & Valentini, 2017 † (2)
Genus Tahua Begg & Grant-Mackie, 2003 † (2)
Genus Talantodiscus P. Fischer, 1885 † (4)
Genus Trapanimaria J. Szabó, M. A. Conti, Monari & Wendt, 2019 † (3)
Genus Trochotomaria M. A. Conti & J. C. Fischer, 1981 † (4)
Family Pleurotomarioidea incertae sedis
Family Polytremariidae Wenz, 1938 † (2)
Family Portlockiellidae Batten, 1956 † (15)
Family Pseudowortheniellidae Bandel, 2009 † accepted as Schizogoniidae L. R. Cox, 1960 †
Family Rhaphischismatidae Knight, 1956 †
Family Zygitidae L. R. Cox, 1960 † (5)
Superfamily Porcellioidea Zittel, 1895 † (170)
Superfamily Pseudophoroidea S. A. Miller, 1889 † (23)
Superfamily Ptychomphaloidea Wenz, 1938 † (115)
Superfamily Schizogonioidea L. R. Cox, 1960 † (74)
Superfamily Sinuspiroidea Mazaev, 2011 † (9)
Superfamily Worthenielloidea Bandel, 2009 † accepted as Schizogonioidea L. R. Cox, 1960 †
Order Seguenziida (923)
Order Trochida (3 799)
Superfamily Fissurellacea accepted as Fissurelloidea J. Fleming, 1822
Superfamily Trochacea accepted as Trochoidea Rafinesque, 1815
Superfamily Turbinoidea Rafinesque, 1815 accepted as Trochoidea Rafinesque, 1815
Superfamily Vetigastropoda incertae sedis (28)
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