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Mollusca (132 851)
Subphylum Aculifera
Subphylum Conchifera
Subphylum Placophora accepted as Polyplacophora
Superclass Aplacophora
Class Amphineura accepted as Aculifera
Class Bivalvia (25 013)
Class Caudofoveata (143)
Class Cephalopoda (1 834)
Class Conchifera accepted as Bivalvia
Class Cricoconarida † (1)
Class Gastropoda (102 753)
Subclass Amphigastropoda † (396)
Suborder Liljevallospiroidei † accepted as Bellerophontoidea F. McCoy, 1852 †
Superfamily Bellerophontoidea F. McCoy, 1852 † (396)
Family Bellerophontidae McCoy, 1852 † (253)
Subfamily Bellerophontinae McCoy, 1852 † (171)
Genus Aglaoglypta Knight, 1942 † (7)
Genus Bellerophon Montfort, 1808 † (108)
Genus Bubovicus Horný, 1962 † (1)
Genus Khumerspira Murata, 1974 † (2)
Genus Kodymites Horný, 1962 † (2)
Genus Liljevallospira Knight, 1945 † (2)
Genus Pharkidonotus Girty, 1911 † (12)
Genus Praematuratropis Rollins, Eldredge & Spiller, 1971 † (1)
Genus Prosoptychus Perner, 1903 † (8)
Genus Ptychobellerophon Delpey, 1941 † (1)
Genus Semilukispira Blodgett & Frýda, 1999 † (1)
Genus Sphaerocyclus Perner, 1903 † (7)
Genus Waagenella de Koninck, 1883 † (19)
Subfamily Bucanopsinae Wahlman, 1992 † (34)
Subfamily Cymbulariinae Horný, 1963 † (4)
Subfamily Knightitinae Knight, 1956 † (29)
Genus Atlantobellerophon Trechmann, 1930 † (1)
Genus Conradella Ulrich & Scofield, 1897 † accepted as Phragmolites Conrad, 1838 †
Genus Dicellonema W. Yü & H.J. Wang, 1975 † (2)
Genus Mogulia W. H. Waagen, 1880 † accepted as Bellerophon Montfort, 1808 †
Genus Phragmolites Conrad, 1838 † (5)
Genus Pseudopharkidonotus H. Z. Pan & A. G. Cook, 2003 † accepted as Teutonophon Blodgett & Frýda, 1999 †
Genus Ptomatis J. M. Clarke, 1899 †
Genus Sorobanobaca Nishida, 1969 †
Genus Teutonophon Blodgett & Frýda, 1999 † (4)
Genus Thoralispira Horný & Vizcaino, 1995 † (2)
Genus Tremagyrus Perner, 1903 † accepted as Bellerophon Montfort, 1808 †
Genus Yochelsonellisa Waterhouse & Z. Q. Chen, 2006 † (1)
Family Bellerophontoidea incertae sedis † (7)
Family Bucanellidae Koken, 1925 † (12)
Family Bucaniidae Ulrich & Scofield, 1897 † (44)
Family Cymbulariidae Horný, 1963 † accepted as Cymbulariinae Horný, 1963 †
Family Euphemitidae Knight, 1956 † (35)
Family Grandostomatidae Horný, 1962 † accepted as Bucaniinae Ulrich & Scofield, 1897 †
Family Liljevallospiridae Golikov & Starobogatov, 1989 † accepted as Bellerophontidae McCoy, 1852 †
Family Protowarthiidae Ulrich & Scofield, 1897 † accepted as Sinuitinae Dall, 1913 †
Family Pterothecidae P. Fischer, 1883 † (5)
Family Sinuitidae Dall, 1913 † (18)
Family Tremanotidae Naef, 1913 † (3)
Family Tropidodiscidae Knight, 1956 † (19)
Subfamily Bucanellinae Koken, 1925 † accepted as Bucanellidae Koken, 1925 †
Subfamily Euphemitinae Knight, 1956 † accepted as Euphemitidae Knight, 1956 †
Subclass Angiogastropoda represented as Gastropoda
Subclass Apogastropoda
Subclass Caenogastropoda (53 670)
Subclass Gastropoda incertae sedis (308)
Subclass Heterobranchia (39 172)
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