Between brackets is the number of accepted species

Click on "-" to collapse/hide all child taxa
Shows the number of accepted species within the taxon
The last expanded taxon is highlighted
Click on "+" to expand/show all child taxa
Click to see the taxon details page
- 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)
- Subclass Coleoidea (1 137)
- Superorder Ammonoida † (78)
- Superorder Bactritoidea †
- Superorder Decabrachia represented as Decapodiformes
- Superorder Decapodiformes (715)
- Order [unassigned] Decapodiformes (2)
- Order Aulacoceratida † (18)
- Order Bathyteuthida (9)
- Order Belemnitida † (131)
- Order Diplobelida † (7)
- Order Idiosepida (8)
- Order Myopsida (48)
- Order Oegopsida (255)
- Suborder Oegopsina represented as Oegopsida
- Superfamily Architeuthoidea Pfeffer, 1900 (5)
- Superfamily Chiroteuthoidea Gray, 1849 (41)
- Superfamily Cranchioidea Prosch, 1847 (64)
- Family Bathothaumatidae Grimpe, 1922 accepted as Cranchiidae Prosch, 1847
- Family Cranchiidae Prosch, 1847 (36)
- Subfamily Cranchiinae Prosch, 1847 (12)
- Genus Cranchia Leach, 1817 (1)
- Subgenus Cranchia (Liocranchia) Pfeffer, 1884 accepted as Liocranchia Pfeffer, 1884
- Species Cranchia (Liocranchia) globula S. S. Berry, 1909
- Subgenus Cranchia (Owenia) Prosch, 1849 accepted as Teuthowenia Chun, 1910
- Species Cranchia armata (Joubin, 1898) accepted as Galiteuthis armata Joubin, 1898
- Species Cranchia bonelliana [sic] accepted as Histioteuthis bonnellii (A. Férussac, 1834)
- Species Cranchia bonnellii A. Férussac, 1834 accepted as Histioteuthis bonnellii (A. Férussac, 1834)
- Species Cranchia globula S. S. Berry, 1909 represented as Cranchia (Liocranchia) globula S. S. Berry, 1909
- Species Cranchia hispida Pfeffer, 1884 accepted as Cranchia scabra Leach, 1817
- Species Cranchia maculata Leach, 1817 accepted as Teuthowenia maculata (Leach, 1817)
- Species Cranchia minima A. d'Orbigny, 1835 accepted as Idiosepius minimus (A. d'Orbigny, 1835)
- Species Cranchia scabra Leach, 1817
- Species Cranchia tenuitentaculeta Pfeffer, 1884 accepted as Cranchia scabra Leach, 1817
- Genus Dyctydiopsis Rochebrune, 1884 accepted as Leachia Lesueur, 1821
- Genus Euzygaena Chun, 1910 accepted as Leachia Lesueur, 1821
- Genus Leachia Lesueur, 1821 (9)
- Genus Liocranchia Pfeffer, 1884 (2)
- Genus Perothis Rathke, 1833 accepted as Leachia Lesueur, 1821
- Genus Pyrgopsis Rochebrune, 1884 accepted as Leachia Lesueur, 1821
- Genus Zygaenopsis Rochebrune, 1884 accepted as Leachia Lesueur, 1821
- Genus Zygocranchia Hoyle, 1909 accepted as Leachia Lesueur, 1821
- Subfamily Galiteuthinae S. S. Berry, 1912 accepted as Taoniinae Pfeffer, 1912
- Subfamily Taoniinae Pfeffer, 1912 (23)
- Subfamily Teuthoweniinae Grimpe, 1922 accepted as Taoniinae Pfeffer, 1912
- Genus Anomalocranchia G. C. Robson, 1924 accepted as Teuthowenia Chun, 1910
- Genus Ascocranchia G. L. Voss, 1962 accepted as Helicocranchia Massy, 1907
- Genus Belonella Lane, 1957 accepted as Taonius Steenstrup, 1861
- Genus Carynoteuthis G. L. Voss, 1960 accepted as Megalocranchia Pfeffer, 1884
- Genus Corynomma Chun, 1906 accepted as Megalocranchia Pfeffer, 1884
- Genus Crystalloteuthis Chun, 1906 accepted as Galiteuthis Joubin, 1898
- Genus Desmoteuthis A. E. Verrill, 1881 accepted as Taonius Steenstrup, 1861
- Genus Drechselia Joubin, 1931 accepted as Leachia Lesueur, 1821
- Genus Enigmocranchia Kubodera & Okutani, 2014 (1)
- Genus Fusocranchia Joubin, 1920 accepted as Liocranchia Pfeffer, 1884
- Genus Hensenioteuthis Pfeffer, 1900
- Genus Leucocranchia Joubin, 1912 accepted as Bathothauma Chun, 1906
- Genus Owenia Prosch, 1849 accepted as Teuthowenia Chun, 1910
- Genus Phasmatopsis Rochebrune, 1884
- Genus Phasmatoteuthion Pfeffer, 1912 accepted as Galiteuthis Joubin, 1898
- Genus Procalistes Lankester, 1884
- Genus Taonidium Pfeffer, 1900 accepted as Galiteuthis Joubin, 1898
- Genus Toxeuma Chun, 1906 accepted as Taonius Steenstrup, 1861
- Genus Uranoteuthis Lu & Clarke, 1974 accepted as Sandalops Chun, 1906
- Genus Verrilliteuthis S. S. Berry, 1916 accepted as Teuthowenia Chun, 1910
- Genus Vossoteuthis Nesis, 1974 accepted as Liguriella Issel, 1908
- Family Desmoteuthidae A. E. Verrill, 1881 accepted as Cranchiidae Prosch, 1847
- Family Loligopsidae A. d'Orbigny, 1842 accepted as Cranchiidae Prosch, 1847
- Family Ommastrephidae Steenstrup, 1857 (25)
- Family Thysanoteuthidae W. Keferstein, 1866 (3)
- Superfamily Cycloteuthoidea Naef, 1923 (11)
- Superfamily Enoploteuthoidea Pfeffer, 1900 (57)
- Superfamily Octopoteuthoidea S. S. Berry, 1912 (9)
- Superfamily Oegopsida incertae sedis (66)
- Superfamily Ommastrephoidea Steenstrup, 1857 accepted as Cranchioidea Prosch, 1847
- Superfamily Onychoteuthoidea Gray, 1847 accepted as Oegopsida incertae sedis
- Superfamily Pholidoteuthoidea Adam, 1950 (2)
- Superfamily Thysanoteuthoidea W. Keferstein, 1866 accepted as Cranchioidea Prosch, 1847
- Order Palaecoleoidea † accepted as Aulacoceratida †
- Order Protobelemnoidea † accepted as Aulacoceratida †
- Order Sepiida (223)
- Order Spirulida (13)
- Order Teuthida
- Family Bayanoteuthidae Naef, 1922 †
- Family Mississaepiidae Doguzhaeva, P. G. Weaver & Ciampaglio, 2014 † (1)
- 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 (102 753)
- 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