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)
- Subphylum Chelicerata (489)
- Subphylum Crustacea (3 773)
- Superclass Allotriocarida (977)
- Superclass Multicrustacea (2 340)
- Superclass Oligostraca (456)
- Class Ichthyostraca (1)
- Class Ostracoda (455)
- Subclass Myodocopa (157)
- Order Halocyprida (51)
- Order Myodocopida (106)
- Suborder Myodocopina (106)
- Superfamily Cylindroleberidoidea Mueller, 1906 (36)
- Superfamily Cypridinoidea Baird, 1850 (29)
- Superfamily Sarsielloidea Brady & Norman, 1896 (41)
- Family Philomedidae Müller, 1906 (29)
- Family Rutidermatidae Brady & Norman, 1896 (3)
- Family Sarsiellidae Brady & Norman, 1896 (9)
- Subclass Ostracoda incertae sedis (1)
- Subclass Platycopa accepted as Platycopida
- Subclass Podocopa (297)
- Class Maxillopoda
- Subphylum Myriapoda (4)
- 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)
- 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)
