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 (12 689)
- Kingdom Animalia (9 795)
- Phylum Acanthocephala (30)
- Phylum Annelida (618)
- Phylum Arthropoda (4 268)
- 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)
- Subclass Coleoidea (80)
- Superorder Decapodiformes (45)
- Superorder Octopodiformes (35)
- Order Octopoda (34)
- Suborder Cirrata (4)
- Suborder Incirrata (30)
- Superfamily Argonautoidea Cantraine, 1841 (1)
- Superfamily Bolitaenoidea Chun, 1911 accepted as Octopodoidea A. d'Orbigny, 1839
- Superfamily Octopodoidea A. d'Orbigny, 1839 (29)
- Family Amphitretidae Hoyle, 1886 (1)
- Subfamily Amphitretinae Hoyle, 1886 (1)
- Family Bathypolypodidae G. C. Robson, 1929
- Family Eledonidae Rochebrune, 1884
- Family Enteroctopodidae Strugnell, Norman, Vecchione, Guzik & Allcock, 2014 (2)
- Family Megaleledonidae Iw. Taki, 1961 (25)
- Family Octopodidae A. d'Orbigny, 1839 (1)
- Order Vampyromorpha (1)
- Class Gastropoda (426)
- 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)
