Between brackets is the number of accepted extant species
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Shows the number of accepted extant species within the taxon
The last expanded taxon is highlighted
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- Biota (12 687)
- Kingdom Animalia (9 793)
- Phylum Acanthocephala (30)
- Phylum Annelida (618)
- Phylum Arthropoda (4 266)
- Phylum Brachiopoda (64)
- Phylum Bryozoa (363)
- Phylum Cephalorhyncha
- Phylum Chaetognatha (25)
- Phylum Chordata (1 415)
- Phylum Cnidaria (460)
- Phylum Ctenophora (11)
- Phylum Dicyemida (1)
- Phylum Echinodermata (638)
- Phylum Ectoprocta accepted as Bryozoa
- Phylum Entoprocta
- Phylum Gastrotricha (1)
- Phylum Gnathostomulida
- Phylum Hemichordata (6)
- Phylum Kinorhyncha (9)
- Phylum Loricifera
- Phylum Mesozoa accepted as Dicyemida
- Phylum Mollusca (753)
- Subphylum Aculifera
- Subphylum Conchifera
- Subphylum Placophora accepted as Polyplacophora
- Superclass Aplacophora
- Class Bivalvia (125)
- Class Caudofoveata (1)
- Class Cephalopoda (80)
- Class Gastropoda (426)
- Subclass Caenogastropoda (274)
- Subclass Heterobranchia (75)
- Infraclass "Lower Heterobranchia" (5)
- Infraclass Euthyneura (70)
- Subterclass Acteonimorpha (5)
- Subterclass Ringipleura (23)
- Superorder Nudipleura (23)
- Order Notaspidea accepted as Pleurobranchomorpha
- Order Nudibranchia (21)
- Suborder Cladobranchia (12)
- Parvorder Aeolidida accepted as Aeolidioidea Gray, 1827
- Parvorder Dendronotida accepted as Dendronotoidea Allman, 1845
- Parvorder Euarminida accepted as Arminoidea Iredale & O'Donoghue, 1923 (1841)
- Superfamily Aeolidioidea Gray, 1827
- Superfamily Arminoidea Iredale & O'Donoghue, 1923 (1841)
- Superfamily Cladobranchia incertae sedis
- Superfamily Dendronotoidea Allman, 1845 (1)
- Family Dotidae Gray, 1853 (1)
- Superfamily Fionoidea Gray, 1857 (4)
- Superfamily Proctonotoidea Gray, 1853 (1)
- Superfamily Tritonioidea Lamarck, 1809 (6)
- Suborder Dexiarchia accepted as Cladobranchia
- Suborder Doridina (9)
- Suborder Euctenidiacea accepted as Doridina
- Order Pleurobranchida (2)
- Order Pleurobranchomorpha accepted as Pleurobranchida
- Subterclass Tectipleura (42)
- Infraclass Heterobranchia incertae sedis
- Infraclass Opisthobranchia
- Infraclass Pulmonata
- Subclass Neomphaliones accepted as Vetigastropoda
- Subclass Patellogastropoda (8)
- Subclass Prosobranchia
- Subclass Vetigastropoda (69)
- Class Monoplacophora
- Class Polyplacophora (12)
- Class Scaphopoda (11)
- Class Solenogastres (98)
- Subclass Chaetodermomorpha accepted as Caudofoveata
- Phylum Nematoda (396)
- Phylum Nemertea (75)
- Phylum Nemertina represented as Nemertea
- Phylum Platyhelminthes (134)
- Phylum Pogonophora accepted as Siboglinidae Caullery, 1914
- Phylum Porifera (281)
- Phylum Priapulida (4)
- Phylum Rotifera (163)
- Phylum Tardigrada (80)
- Kingdom Archaea (1)
- Kingdom Bacteria (310)
- Kingdom Chromista (956)
- Kingdom Fungi (740)
- Kingdom Plantae (822)
- Kingdom Protozoa (65)
