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Mollusca (132 888)
Subphylum Aculifera
Subphylum Conchifera
Subphylum Placophora accepted as Polyplacophora
Superclass Aplacophora
Class Amphineura accepted as Aculifera
Class Bivalvia (25 022)
Class Caudofoveata (143)
Class Cephalopoda (1 838)
Class Conchifera accepted as Bivalvia
Class Cricoconarida † (1)
Class Gastropoda (102 777)
Subclass Amphigastropoda † (396)
Subclass Angiogastropoda represented as Gastropoda
Subclass Apogastropoda
Subclass Caenogastropoda (53 684)
Subclass Gastropoda incertae sedis (309)
Subclass Heterobranchia (39 180)
Infraclass "Lower Heterobranchia" (1 137)
Infraclass Euthyneura (37 457)
Subterclass Acteonimorpha (411)
Subterclass Ringipleura (2 917)
Subterclass Tectipleura (34 129)
Superorder Acochlidiimorpha (48)
Superorder Ascoglossa accepted as Sacoglossa
Superorder Basommatophora accepted as Hygrophila
Superorder Eupulmonata (25 591)
Superorder Hygrophila (2 005)
Superorder Pneumopulmonata
Superorder Pylopulmonata (4 285)
Superorder Sacoglossa (391)
Suborder Oxynoacea accepted as Oxynooidea Stoliczka, 1868 (1847)
Suborder Placobranchacea accepted as Plakobranchoidea Gray, 1840
Suborder Plakobranchacea accepted as Plakobranchoidea Gray, 1840
Superfamily Cylindrobulloidea Thiele, 1931 accepted as Oxynooidea Stoliczka, 1868 (1847)
Superfamily Limapontioidea Gray, 1847 accepted as Plakobranchoidea Gray, 1840
Superfamily Oxynooidea Stoliczka, 1868 (1847) (93)
Family Arthessidae C. R. Boettger, 1963 accepted as Volvatellidae Pilsbry, 1895
Family Ascobullidae Habe, Okutani & Nishiwaki, 1994 accepted as Volvatellidae Pilsbry, 1895
Family Cylindrobullidae Thiele, 1931 (6)
Family Icarinae Gray, 1847 accepted as Oxynoidae Stoliczka, 1868 (1847)
Family Juliidae E. A. Smith, 1885 (41)
Subfamily Bertheliniinae Keen & A. G. Smith, 1961 (20)
Subfamily Gougerotiinae Le Renard, 1980 † (4)
Genus Gougerotia Le Renard, 1980 † (1)
Genus Hemiplicatula Deshayes, 1861 † (2)
Species Hemiplicatula pissarroi (Cossmann, 1904) †
Species Hemiplicatula solida (Melleville, 1843) †
Genus Saintia de Raincourt, 1877 † (1)
Genus Semiplicatula P. Fischer, 1886 † accepted as Hemiplicatula Deshayes, 1861 †
Subfamily Juliinae E. A. Smith, 1885 (17)
Genus Anomalomya Cossmann, 1887 † accepted as Berthelinia Crosse, 1875
Genus Edenttellina Gatliff & Gabriel, 1911 accepted as Berthelinia Crosse, 1875
Genus Ludovicia Cossmann, 1887 † accepted as Berthelinia Crosse, 1875
Genus Midorigai Burn, 1960 accepted as Berthelinia Crosse, 1875
Genus Prasina Deshayes, 1863 accepted as Julia A. Gould, 1862
Family Lobigeridae Pruvot-Fol, 1954 accepted as Oxynoidae Stoliczka, 1868 (1847)
Family Lophocercinae Gray, 1847 accepted as Oxynoidae Stoliczka, 1868 (1847)
Family Oxynoeidae accepted as Oxynoidae Stoliczka, 1868 (1847)
Family Oxynoidae Stoliczka, 1868 (1847) (21)
Family Prasinidae Stoliczka, 1871 accepted as Juliidae E. A. Smith, 1885
Family Tamanovalvidae Kawaguti & Baba, 1959 accepted as Bertheliniinae Keen & A. G. Smith, 1961
Family Volvatellidae Pilsbry, 1895 (25)
Family Volvatellinae Pilsbry, 1895 accepted as Volvatellidae Pilsbry, 1895
Superfamily Plakobranchoidea Gray, 1840 (295)
Superfamily Platyhedyloidea Salvini-Plawen, 1973 (3)
Superorder Siphonarimorpha (163)
Order Anaspidea accepted as Aplysiida
Order Aplysiida (101)
Order Aplysiomorpha accepted as Aplysiida
Order Archaeopulmonata accepted as Siphonarioidea Gray, 1827
Order Bullomorpha accepted as Cephalaspidea
Order Cephalaspidea (1 036)
Order Heterostropha accepted as Pyramidellidae J. E. Gray, 1840
Order Pteropoda (414)
Order Runcinacea accepted as Runcinida
Order Runcinida (80)
Order Tectibranchiata
Order Thecosomata
Order Umbraculida (15)
Superorder Euthyneura incertae sedis
Infraclass Heterobranchia incertae sedis (478)
Infraclass Mesoneura (108)
Infraclass Opisthobranchia
Infraclass Pulmonata
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 (6 783)
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