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)
- Order Sabellida (2)
- Order Spionida (21)
- Order Terebellida (7)
- Suborder Cirratuliformia (3)
- Suborder Terebelliformia (4)
- Family Pectinariidae Quatrefages, 1866 (2)
- Genus Cistena Leach, 1816 accepted as Pectinaria Lamarck, 1818
- Genus Lagis Malmgren, 1866 (1)
- Species Lagis koreni Malmgren, 1866
- Genus Pectinaria Lamarck, 1818 (1)
- Family Terebellidae Johnston, 1846 (2)
- Family Sabellariidae Johnston, 1865 (1)
- Infraclass Scolecida (11)
- 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