Between brackets is the number of accepted species
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- Mollusca (132 754)
- Subphylum Aculifera
- Subphylum Conchifera
- Subphylum Placophora accepted as Polyplacophora
- Superclass Aplacophora
- Class Amphineura accepted as Aculifera
- Class Bivalvia (24 992)
- Class Caudofoveata (143)
- Class Cephalopoda (1 832)
- Class Conchifera accepted as Bivalvia
- Class Cricoconarida † (1)
- Class Gastropoda (102 679)
- 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)
- Subfamily Anulidentaliinae Chistikov, 1975 accepted as Anulidentaliidae Chistikov, 1975
- Genus Antalis H. Adams & A. Adams, 1854 (66)
- Genus Coccodentalium Sacco, 1896 (4)
- Genus Compressidentalium Habe, 1963 (13)
- Genus Dentale da Costa, 1778 accepted as Antalis H. Adams & A. Adams, 1854
- Genus Dentalites Schlotheim, 1813 † accepted as Dentalium Linnaeus, 1758
- Genus Dentalium Linnaeus, 1758 (123)
- Genus Entaliopsis R. B. Newton & G. F. Harris, 1894 accepted as Antalis H. Adams & A. Adams, 1854
- Genus Entalis Gray, 1847 accepted as Antalis H. Adams & A. Adams, 1854
- Genus Eudentalium Cotton & Godfrey, 1933 (1)
- Genus Fissidentalium P. Fischer, 1885 (58)
- Genus Graptacme Pilsbry & Sharp, 1897 (20)
- Species Graptacme acutissima (R. B. Watson, 1879)
- Species Graptacme acutistriata G. Steiner & Kabat, 2004
- Species Graptacme africana (G. B. Sowerby III, 1903)
- Species Graptacme amaliense (J. B. Henderson, 1920)
- Species Graptacme buccinulum (A. Gould, 1859) accepted as Dentalium buccinulum A. Gould, 1859
- Species Graptacme calamus (Dall, 1889)
- Species Graptacme eborea (Conrad, 1846)
- Species Graptacme elpis (Winckworth, 1927)
- Species Graptacme inversa (Deshayes, 1826)
- Species Graptacme lactea (Deshayes, 1826)
- Species Graptacme marchadi (Nicklès, 1979)
- Species Graptacme multistricta (Finlay & Marwick, 1937) †
- Species Graptacme nielseni Lamprell & Healy, 1998
- Species Graptacme novaehollandiae (Chenu, 1843)
- Species Graptacme obtura Fogarolli & Simone, 2024
- Species Graptacme pareorensis (Pilsbry & Sharp, 1897) †
- Species Graptacme perlonga (Dall, 1881)
- Species Graptacme secta (Deshayes, 1826)
- Species Graptacme semistriata (W. Turton, 1819)
- Species Graptacme semistriolata (Guilding, 1834)
- Species Graptacme splendida (G. B. Sowerby I, 1832)
- Species Graptacme takakoae Tsuchida & Tachi, 1999
- Genus Lentigodentalium Habe, 1963 accepted as Dentalium Linnaeus, 1758
- Genus Minodentalium Asato & Kase, 2021 † (2)
- Genus Paradentalium Cotton & Godfrey, 1933 (23)
- Genus Pictodentalium Habe, 1963 (3)
- Genus Plagioglypta Pilsbry, 1898 (4)
- Genus Prodentalium Young, 1942 † (4)
- Genus Schizodentalium G. B. Sowerby III, 1894 (1)
- Genus Striodentalium Habe, 1964 (8)
- Genus Tesseracme Pilsbry & Sharp, 1898 (8)
- Family Eboreidentidae Chistikov, 1975 accepted as Calliodentaliidae Chistikov, 1975
- Family Fustiariidae G. Steiner, 1991 (25)
- Family Gadilinidae Chistikov, 1975 (29)
- 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
