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Mollusca (132 848)
Subphylum Aculifera
Subphylum Conchifera
Subphylum Placophora accepted as Polyplacophora
Superclass Aplacophora
Class Amphineura accepted as Aculifera
Class Bivalvia (25 011)
Class Caudofoveata (143)
Class Cephalopoda (1 834)
Subclass Coleoidea (1 137)
Superorder Ammonoida † (78)
Order Agoniatitida †
Order Ammonitida † (14)
Suborder Ammonitina † (9)
Superfamily Acanthoceratoidea †
Superfamily Desmoceratoidea Zittel, 1895 †
Superfamily Endemoceratoidea †
Superfamily Eoderoceratoidea Spath, 1929 †
Superfamily Hammatoceratoidea †
Superfamily Haploceratoidea Zittel, 1884 †
Superfamily Hildoceratoidea Hyatt, 1867 † (2)
Superfamily Hoplitoidea †
Superfamily Perisphinctoidea Steinmann, 1890 † (6)
Family Ataxioceratidae Buckman, 1921 †
Family Holcodiscidae Spath, 1923 †
Family Neocomitidae Salfeld, 1921 † (3)
Subfamily Berriasellinae Spath, 1922 †
Subfamily Endemoceratinae Schindewolf, 1966 †
Subfamily Leopoldiinae Thieuloy, 1971 † (1)
Genus Acanthodiscus Uhlig, 1905 †
Genus Breistrofferella Thieuloy, 1971 †
Genus Chamalocia Thieuloy, 1971 †
Genus Dicostella Busnardo, 1966 † accepted as †
Genus Hoplitides Koenen, 1902 † accepted as Leopoldia Mayer-Eymar, 1887 †
Genus Jurienella A. Pictet & Bulot, 2025 † (1)
Genus Karakaschiceras Thieuloy, 1971 †
Genus Leopoldia Mayer-Eymar, 1887 †
Genus Lyticoceras Hyatt, 1900 †
Genus Neohoploceras Spath, 1939 †
Genus Saynella Kilian, 1910 †
Subfamily Neocomitinae Salfeld, 1921 † (2)
Family Olcostephanidae Haug, 1910 † (1)
Family Oosterellidae Breistroffer, 1940 †
Family Pachyceratidae Buckman, 1918 †
Family Perisphinctidae Steinmann, 1890 † (2)
Family Polyptychitidae Wedekind, 1918 †
Family Suritidae Sazonova, 1971 † accepted as Tolliinae Spath, 1952 †
Subfamily Menjaitinae Sazonova, 1971 † accepted as Tolliinae Spath, 1952 †
Subfamily Peregrinoceratinae Sazonova & Sazonova, 1984 † accepted as Tolliinae Spath, 1952 †
Superfamily Psiloceratoidea †
Superfamily Stephanoceratoidea † (1)
Suborder Ancyloceratina † (4)
Suborder Haploceratina †
Suborder Lytoceratina † (1)
Suborder Phylloceratina †
Order Ceratitida † (58)
Order Clymeniida †
Order Goniatitida †
Order Phylloceratida † (3)
Order Prolecanitida † (3)
Superorder Bactritoidea †
Superorder Decabrachia represented as Decapodiformes
Superorder Decapodiformes (715)
Superorder Octobrachia represented as Octopodiformes
Superorder Octopodiformes (341)
Order Coleoidea incertae sedis † (3)
Subclass Endoceratia † (32)
Subclass Multiceratia † (290)
Subclass Nautiloida (136)
Subclass Orthoceratia † (200)
Subclass Plectronoceratia † (16)
Subclass Tarphyceratia † (23)
Class Conchifera accepted as Bivalvia
Class Cricoconarida † (1)
Class Gastropoda (102 752)
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