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 (12 687)
- Kingdom Animalia (9 793)
- 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)
- Order Amphinomida (15)
- Order Eunicida (35)
- Order Phyllodocida (216)
- Suborder Aphroditiformia (63)
- Suborder Glyceriformia (7)
- Suborder Nereidiformia (64)
- Suborder Phyllodocida incertae sedis (37)
- Family Iospilidae Bergström, 1914 (2)
- Family Nephtyidae Grube, 1850 (11)
- Family Sphaerodoridae Malmgren, 1867 (12)
- Family Tomopteridae Grube, 1850 (6)
- Genus Enapteris Rosa, 1908 (1)
- Genus Tomopteris Eschscholtz, 1825 (5)
- Species Tomopteris carpenteri Quatrefages, 1866
- Species Tomopteris cavallii Rosa, 1908
- Species Tomopteris ligulata Rosa, 1908
- Species Tomopteris planktonis Apstein, 1900
- Species Tomopteris septentrionalis Steenstrup, 1849
- Family Typhloscolecidae Uljanin, 1878 (6)
- Suborder Phyllodociformia (45)
- Subclass Polychaeta incertae sedis (11)
- Subclass Sedentaria (261)
- Order Sipuncula (15)
- Phylum Arthropoda (4 266)
- 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)
