Between brackets is the number of accepted species

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- Mollusca (132 708)
- Subphylum Aculifera
- Subphylum Conchifera
- Subphylum Placophora accepted as Polyplacophora
- Superclass Aplacophora
- Class Amphineura accepted as Aculifera
- Class Bivalvia (24 984)
- Class Caudofoveata (143)
- Class Cephalopoda (1 827)
- Class Conchifera accepted as Bivalvia
- Class Cricoconarida † (1)
- Class Gastropoda (102 646)
- Subclass Amphigastropoda † (387)
- Subclass Angiogastropoda represented as Gastropoda
- Subclass Apogastropoda
- Subclass Caenogastropoda (53 590)
- Subclass Gastropoda incertae sedis (308)
- Subclass Heterobranchia (39 154)
- Infraclass "Lower Heterobranchia" (1 137)
- Infraclass Euthyneura (37 431)
- Subterclass Acteonimorpha (411)
- Subterclass Ringipleura (2 918)
- Superorder Nudipleura (2 749)
- Order Notaspidea accepted as Pleurobranchomorpha
- Order Nudibranchia (2 652)
- Suborder Aeolidina accepted as Cladobranchia
- Suborder Anthobranchia accepted as Doridina
- Suborder Cladobranchia (1 093)
- Suborder Cladohepatica accepted as Cladobranchia
- Suborder Dexiarchia accepted as Cladobranchia
- Suborder Doridina (1 558)
- Infraorder Bathydoridoidei (8)
- Infraorder Doridoidei (1 550)
- Superfamily Chromodoridoidea Bergh, 1891 (482)
- Superfamily Doridoidea Rafinesque, 1815 (434)
- Family Archidorididae Bergh, 1891 accepted as Dorididae Rafinesque, 1815
- Family Diaululidae Bergh, 1891 accepted as Discodorididae Bergh, 1891
- Family Discodorididae Bergh, 1891 (355)
- Genus “Montereina” sensu Dayrat, 2010
- Genus Alloiodoris Bergh, 1904 (3)
- Genus Anisodoris Bergh, 1898 accepted as Diaulula Bergh, 1878 (1)
- Genus Aphelodoris Bergh, 1879 (10)
- Genus Aporodoris Ihering, 1886 (3)
- Genus Argus Bohadsch, 1761 accepted as Platydoris Bergh, 1877
- Genus Asteronotus Ehrenberg, 1831 (6)
- Genus Atagema Gray, 1850 (22)
- Genus Audura Bergh, 1878 accepted as Jorunna Bergh, 1876
- Genus Avaldesia Donohoo & Gosliner, 2024 (3)
- Genus Awuka Er. Marcus, 1955 accepted as Jorunna Bergh, 1876
- Genus Baptodoris Bergh, 1884 (5)
- Genus Boreodoris Odhner, 1939 accepted as Rostanga Bergh, 1879
- Genus Carminodoris Bergh, 1889 (14)
- Genus Carryodoris Vayssière, 1919 accepted as Geitodoris Bergh, 1891
- Genus Diaulula Bergh, 1878 (17)
- Genus Dictyodoris Bergh, 1880
- Genus Discodoris Bergh, 1877 (19)
- Genus Erythrodoris Pruvot-Fol, 1933 accepted as Discodoris Bergh, 1877
- Genus Fracassa Bergh, 1878 accepted as Discodoris Bergh, 1877
- Genus Gargamella Bergh, 1894 (10)
- Genus Geitodoris Bergh, 1891 (18)
- Genus Glossodoridiformia O'Donoghue, 1927 accepted as Atagema Gray, 1850
- Genus Gravieria Vayssière, 1912 accepted as Sclerodoris Eliot, 1904
- Genus Gruvelia Risbec, 1928
- Genus Halgerda Bergh, 1880 (55)
- Genus Hiatodoris Dayrat, 2010 (1)
- Genus Hoplodoris Bergh, 1880 (3)
- Genus Jorunna Bergh, 1876 (25)
- Genus Kentrodoris Bergh, 1876 accepted as Jorunna Bergh, 1876
- Genus Montereina MacFarland, 1905 accepted as Peltodoris Bergh, 1880
- Genus Nirva Bergh, 1905
- Genus Nophodoris Á. Valdés & Gosliner, 2001 (2)
- Genus Nuvuca Ev. Marcus & Er. Marcus, 1967 accepted as Thordisa Bergh, 1877
- Genus Otinodoris K. M. White, 1948
- Genus Paradoris Bergh, 1884 (19)
- Genus Peltodoris Bergh, 1880 (15)
- Genus Percunas Ev. Marcus, 1971 accepted as Paradoris Bergh, 1884
- Genus Peronodoris Bergh, 1904
- Genus Petelodoris Bergh, 1882 accepted as Atagema Gray, 1850
- Genus Phialodoris Bergh, 1890 accepted as Peltodoris Bergh, 1880 (1)
- Genus Phlegmodoris Bergh, 1878 accepted as Atagema Gray, 1850
- Genus Platydoris Bergh, 1877 (25)
- Genus Pupsikus Er. Marcus & Ev. Marcus, 1970 accepted as Thordisa Bergh, 1877
- Genus Rostanga Bergh, 1879 (22)
- Genus Sclerodoris Eliot, 1904 (12)
- Genus Sebadoris Er. Marcus & Ev. Marcus, 1960 (2)
- Genus Taringa Er. Marcus, 1955 (14)
- Species Taringa aivica Ev. Marcus & Er. Marcus, 1967
- Species Taringa arcaica Moro & Ortea, 2015
- Species Taringa armata Swennen, 1961
- Species Taringa ascitica Ortea, J. M. Pérez & Llera, 1982
- Species Taringa bacalladoi Ortea, J. M. Pérez & Llera, 1982
- Species Taringa caudata (Farran, 1905) accepted as Taringa sublutea (Abraham, 1877)
- Species Taringa faba Ballesteros, Llera & Ortea, 1985
- Species Taringa fanabensis Ortea & Martínez, 1992 accepted as Taringa millegrana (Alder & Hancock, 1854)
- Species Taringa halgerda Gosliner & Behrens, 1998
- Species Taringa iemanja Alvim & Pimenta, 2013
- Species Taringa luteola (Kelaart, 1858) accepted as Taringa sublutea (Abraham, 1877)
- Species Taringa millegrana (Alder & Hancock, 1854) accepted as Aporodoris millegrana (Alder & Hancock, 1854)
- Species Taringa oleica Ortea, J. M. Pérez & Llera, 1982
- Species Taringa pinoi Perrone, 1985
- Species Taringa robledales Ortea, Moro & Espinosa, 2015
- Species Taringa sublutea (Abraham, 1877)
- Species Taringa tarifaensis García-Gómez, Cervera & García-Martin, 1993 accepted as Taringa millegrana (Alder & Hancock, 1854)
- Species Taringa telopia Er. Marcus, 1955
- Species Taringa tritorquis Ortea, J. M. Pérez & Llera, 1982
- Genus Tayuva Ev. Marcus & Er. Marcus, 1967 (5)
- Genus Thordisa Bergh, 1877 (22)
- Genus Thorybopus Bouchet, 1977 (1)
- Genus Trippa Bergh, 1877 accepted as Atagema Gray, 1850
- Species Discodorididae aliciae Dayrat, 2005 accepted as “Montereina” aliciae (Dayrat, 2005)
- Family Dorididae Rafinesque, 1815 (79)
- Family Geitodorididae Odhner, 1968 accepted as Discodorididae Bergh, 1891
- Family Gruveliidae Thiele, 1931 accepted as Discodorididae Bergh, 1891
- Family Halgerdidae Odhner, 1926 accepted as Discodorididae Bergh, 1891
- Family Kentrodorididae Bergh, 1891 accepted as Discodorididae Bergh, 1891
- Family Platydorididae Bergh, 1891 accepted as Discodorididae Bergh, 1891
- Family Rostangidae Pruvot-Fol, 1951 accepted as Discodorididae Bergh, 1891
- Subfamily Conualeviinae Collier & Farmer, 1964 accepted as Dorididae Rafinesque, 1815
- Subfamily Neodoridinae Odhner, 1968 accepted as Dorididae Rafinesque, 1815
- Superfamily Doridoidei incertae sedis
- Superfamily Onchidoridacea accepted as Onchidoridoidea Gray, 1827
- Superfamily Onchidoridoidea Gray, 1827 (278)
- Superfamily Phyllidioidea Rafinesque, 1814 (156)
- Superfamily Polyceroidea Alder & Hancock, 1845 (200)
- Superfamily Porodoridacea Odhner, 1968 accepted as Phyllidioidea Rafinesque, 1814
- Superfamily Porostomata Bergh, 1876 accepted as Phyllidioidea Rafinesque, 1814
- Infraorder Gnathodoridacea accepted as Bathydoridoidei
- Suborder Euctenidiacea accepted as Doridina
- Suborder Holohepatica accepted as Doridina
- Suborder Nudibranchia incertae sedis (1)
- Order Pleurobranchida (97)
- Genus Abranchus [sic] accepted as Abrancha van Hasselt, 1824
- Genus Spongiodoris Pruvot-Fol, 1933
- Superorder Ringiculimorpha (169)
- Order Pleurobranchomorpha accepted as Pleurobranchida
- Genus Abrancha van Hasselt, 1824
- Subterclass Tectipleura (34 102)
- 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 (6 782)
- 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