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 (12 686)
- Kingdom Animalia (9 792)
- Phylum Acanthocephala (30)
- Phylum Annelida (618)
- Superclass Annelida incertae sedis (5)
- Class Clitellata (50)
- Class Polychaeta (548)
- Subclass Aciculata accepted as Errantia
- Subclass Echiura (10)
- Subclass Errantia (266)
- Subclass Polychaeta incertae sedis (11)
- Subclass Sedentaria (261)
- Infraclass Canalipalpata (185)
- Order Sabellida (57)
- Order Spionida (16)
- Order Terebellida (110)
- Suborder Cirratuliformia (38)
- Infraorder Fauveliopsida
- Infraorder Flabelligerida
- Infraorder Sternaspida
- Family Acrocirridae Banse, 1969 (4)
- Genus Flabelligella Hartman, 1965 (1)
- Genus Flabelligena Gillet, 2001
- Genus Flabelliseta Hartman, 1978 (1)
- Species Flabelliseta incrusta Hartman, 1978
- Genus Helmetophorus Hartman, 1978 (1)
- Genus Macrochaeta Grube, 1850 (1)
- Family Cirratulidae Ryckholt, 1851 (14)
- Family Fauveliopsidae Hartman, 1971 (2)
- Family Flabelligeridae de Saint-Joseph, 1894 (18)
- Family Sternaspidae Carus, 1863
- Suborder Terebelliformia (72)
- Family Sabellariidae Johnston, 1865 (2)
- Infraclass Scolecida (74)
- Suborder Chaetopteriformia
- Family Chaetopteridae Audouin & Milne Edwards, 1833 (2)
- Order Sipuncula (15)
- 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)
- 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)
