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 (879)
- Kingdom Animalia (681)
- Phylum Annelida (119)
- Class Clitellata (35)
- Class Polychaeta (84)
- Subclass Errantia (38)
- Order Phyllodocida (38)
- Suborder Aphroditiformia (9)
- Suborder Glyceriformia (2)
- Suborder Nereidiformia (18)
- Family Hesionidae Grube, 1850 (4)
- Subfamily Ophiodrominae Pleijel, 1998 (1)
- Subfamily Psamathinae Pleijel, 1998 (3)
- Genus Kefersteinia Quatrefages, 1866 accepted as Psamathe Johnston, 1836
- Genus Psamathe Johnston, 1836 (2)
- Species Psamathe cirrhata Keferstein, 1862
- Species Psamathe fusca Johnston, 1836
- Genus Syllidia Quatrefages, 1865 (1)
- Family Microphthalmidae Hartmann-Schröder, 1971 (4)
- Family Nereididae Blainville, 1818 (5)
- Family Syllidae Grube, 1850 (5)
- Suborder Phyllodocida incertae sedis (4)
- Suborder Phyllodociformia (5)
- Subclass Polychaeta incertae sedis (4)
- Subclass Sedentaria (42)
- Phylum Arthropoda (168)
- Phylum Bryozoa (3)
- Phylum Chaetognatha (2)
- Phylum Chordata (276)
- Phylum Cnidaria (5)
- Phylum Ctenophora (3)
- Phylum Echinodermata (7)
- Phylum Kinorhyncha (2)
- Phylum Mollusca (70)
- Phylum Nematoda (1)
- Phylum Platyhelminthes (1)
- Phylum Porifera (2)
- Phylum Rotifera (22)
- Kingdom Bacteria (5)
- Kingdom Chromista (179)
- Kingdom Plantae (14)
- Kingdom Protozoa