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 (879)
- Kingdom Animalia (681)
- Phylum Annelida (119)
- Class Clitellata (35)
- Class Polychaeta (84)
- Subclass Errantia (38)
- Subclass Polychaeta incertae sedis (4)
- Subclass Sedentaria (42)
- Infraclass Canalipalpata (31)
- Infraclass Scolecida (11)
- Family Arenicolidae Johnston, 1835 (2)
- Family Capitellidae Grube, 1862 (3)
- Genus Capitella Blainville, 1828 (1)
- Genus Heteromastus Eisig, 1887 (1)
- Genus Notomastus M. Sars, 1851 (1)
- Family Cossuridae Day, 1963 (1)
- Family Opheliidae Malmgren, 1867 (2)
- Family Orbiniidae Hartman, 1942 (1)
- Family Paraonidae Cerruti, 1909 (2)
- 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