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
Click on "+" to expand/show all child taxa
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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)
- Phylum Ctenophora (11)
- Phylum Dicyemida (1)
- Phylum Echinodermata (638)
- Subphylum Asterozoa (412)
- Class Asteroidea (290)
- Class Ophiuroidea (122)
- Subclass Myophiuroida (122)
- Infraclass Metophiurida (122)
- Superorder Euryophiurida (70)
- Superorder Ophintegrida (52)
- Order Amphilepidida (31)
- Order Ophiacanthida (19)
- Suborder Ophiacanthina (17)
- Family Ophiacanthidae Ljungman, 1867 (15)
- Family Ophiocamacidae O'Hara, Stöhr, Hugall, Thuy & Martynov, 2018 (2)
- Family Ophiotomidae Paterson, 1985
- Suborder Ophiodermatina (1)
- Family Ophiacanthida incertae sedis (1)
- Order Ophioleucida (1)
- Order Ophioscolecida (1)
- Subclass Myophiuroidea accepted as Myophiuroida
- Order Gnathophiurida accepted as Gnathophiurina
- Order Ophiuroidea Incertae sedis
- Order Phrynophiurida
- Class Stelleroidea accepted as Asterozoa
- Subphylum Crinozoa (48)
- Subphylum Echinozoa (178)
- 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)
