Between brackets is the number of accepted extant species
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Shows the number of accepted extant species within the taxon
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- Biota (12 686)
- Kingdom Animalia (9 792)
- Phylum Acanthocephala (30)
- Phylum Annelida (618)
- Phylum Arthropoda (4 265)
- Phylum Brachiopoda (64)
- Phylum Bryozoa (363)
- Phylum Cephalorhyncha
- Phylum Chaetognatha (25)
- Phylum Chordata (1 415)
- Phylum Cnidaria (460)
- Subphylum Anthozoa (126)
- Class Anthozoa incertae sedis
- Class Hexacorallia (57)
- Class Octocorallia (69)
- Order Alcyonacea accepted as Octocorallia
- Order Gorgonacea accepted as Octocorallia
- Order Malacalcyonacea (7)
- Order Octocorallia incertae sedis (2)
- Order Pennatulacea accepted as Pennatuloidea Ehrenberg, 1834
- Order Scleralcyonacea (60)
- Suborder Calcaxonia accepted as Scleralcyonacea
- Superfamily Pennatuloidea Ehrenberg, 1834 (7)
- Family Anthoptilidae Kölliker, 1880 (1)
- Genus Anthoptilum Kölliker, 1880 (1)
- Family Funiculinidae Gray, 1870 (1)
- Family Kophobelemnidae Gray, 1860 (2)
- Family Protoptilidae Kölliker, 1872
- Family Umbellulidae Kölliker, 1880 accepted as Umbellulidae Lindahl, 1874 (1840)
- Family Umbellulidae Lindahl, 1874 (1840) (3)
- Family Virgulariidae Verrill, 1868
- Family Chrysogorgiidae Verrill, 1883 (2)
- Family Coralliidae Lamouroux, 1812 (2)
- Family Ifalukellidae Bayer, 1955
- Family Keratoisididae Gray, 1870
- Family Mopseidae Gray, 1870 (14)
- Family Paragorgiidae Kükenthal, 1916 accepted as Coralliidae Lamouroux, 1812
- Family Primnoidae Milne Edwards, 1857 (35)
- Family Spongiodermidae Wright & Studer, 1889
- Subphylum Cnidaria incertae sedis
- Subphylum Endocnidozoa
- Subphylum Medusozoa (334)
- 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)
