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)
- Class Copepoda (553)
- Class Hexanauplia accepted as Thecostraca
- Class Malacostraca (1 740)
- Subclass Eumalacostraca (1 732)
- Superorder Eucarida (72)
- Superorder Peracarida (1 660)
- Order Amphipoda (962)
- Suborder Amphilochidea (593)
- Infraorder Amphilochida (284)
- Infraorder Lysianassida (309)
- Parvorder Haustoriidira (55)
- Parvorder Lysianassidira (187)
- Superfamily Alicelloidea Lowry & De Broyer, 2008 (2)
- Superfamily Aristioidea Lowry & Stoddart, 1997 (39)
- Superfamily Lysianassoidea Dana, 1849 (122)
- Superfamily Stegocephaloidea Dana, 1852 (24)
- Family Stegocephalidae Dana, 1852 (24)
- Subfamily Andaniexinae Berge & Vader, 2001 (12)
- Subfamily Andaniopsinae Berge & Vader, 2001 (1)
- Subfamily Parandaniinae Berge & Vader, 2001 (3)
- Subfamily Stegocephalinae Dana, 1852 (8)
- Genus Euandania Stebbing, 1899 accepted as Parandania Stebbing, 1899
- Species Euandania gigantea (Stebbing, 1888) accepted as Parandania gigantea (Stebbing, 1883)
- Parvorder Synopiidira (67)
- Suborder Amphipoda incertae sedis (2)
- Suborder Caprellidea accepted as Caprelloidea Leach, 1814
- Suborder Colomastigidea (7)
- Suborder Corophiidea accepted as Corophiida
- Suborder Gammaridea
- Suborder Hyperiidea (95)
- Suborder Hyperiopsidea (2)
- Suborder Senticaudata (263)
- Order Cumacea (92)
- Order Isopoda (403)
- Order Lophogastrida (8)
- Order Mysida (56)
- Order Mysidacea accepted as Mysida
- Order Tanaidacea (139)
- Subclass Phyllocarida (8)
- Class Tantulocarida (1)
- Class Thecostraca (46)
- Superclass Oligostraca (456)
- 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)
