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)
- Subphylum Anthozoa (126)
- Subphylum Cnidaria incertae sedis
- Subphylum Endocnidozoa
- Subphylum Medusozoa (334)
- Class Hydrozoa (312)
- Subclass Hydroidolina (279)
- Order Anthoathecata (80)
- Order Leptothecata (152)
- Order Siphonophora accepted as Siphonophorae
- Order Siphonophorae (47)
- Suborder Calycophorae (39)
- Suborder Cystonectae (1)
- Suborder Physonectae (7)
- Family Agalmatidae Brandt, 1835 (4)
- Genus Agalma Eschscholtz, 1825 (1)
- Genus Halistemma Huxley, 1859 (1)
- Species Halistemma cupulifera Lens & van Riemsdijk, 1908
- Genus Marrus Totton, 1954 (1)
- Genus Melophysa Haeckel, 1888 (1)
- Family Agalmidae Brandt, 1835 accepted as Agalmatidae Brandt, 1835
- Family Athorybiidae Huxley, 1859 accepted as Agalmatidae Brandt, 1835
- Family Pyrostephidae Moser, 1925 (2)
- Family Resomiidae Pugh, 2006 (1)
- Subclass Trachylinae (33)
- Class Scyphozoa (18)
- Class Staurozoa (4)
- 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)
