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)
- 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)
- Order Dentaliida (438)
- Family Anulidentaliidae Chistikov, 1975 (2)
- Family Calliodentaliidae Chistikov, 1975 (4)
- Family Dentaliidae Children, 1834 (338)
- Family Eboreidentidae Chistikov, 1975 accepted as Calliodentaliidae Chistikov, 1975
- Family Fustiariidae G. Steiner, 1991 (25)
- Family Gadilinidae Chistikov, 1975 (29)
- Genus Episiphon Pilsbry & Sharp, 1897 (23)
- Genus Gadilina Foresti, 1895 (5)
- Genus Lobantale Cossmann, 1888 † (1)
- Family Laevidentaliidae C. P. Palmer, 1974 (33)
- Family Omniglyptidae Chistikov, 1975 (3)
- Family Plagioglyptidae Starobogatov, 1974 accepted as Dentaliidae Children, 1834
- Family Prodentaliidae Starobogatov, 1974 † accepted as Dentaliidae Children, 1834
- Family Rhabdidae Chistikov, 1975 (4)
- Order Gadilida (314)
- Class Solenoconchia accepted as Scaphopoda
- Class Solenogastres (313)
- Subclass Chaetodermomorpha accepted as Caudofoveata