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)
- 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)
- Class Anopla accepted as Nemertea incertae sedis
- Class Enopla accepted as Hoplonemertea
- Class Hoplonemertea (49)
- Order Monostilifera (37)
- Suborder Cratenemertea (6)
- Suborder Eumonostilifera (31)
- Infraorder Amphiporina (25)
- Family Amphiporidae Örsted, 1843 (12)
- Family Emplectonematidae Bürger, 1904 (1)
- Family Neesiidae Chernyshev, 2005 (1)
- Genus Paranemertes Coe, 1901 (1)
- Species Paranemertes brattstroemi Friedrich, 1970
- Family Prosorhochmidae Bürger, 1895
- Family Sacconemertidae Chernyshev, Timoshkin & Kawakatsu, 1998 (1)
- Family Tetrastemmatidae Hubrecht, 1879 (10)
- Infraorder Oerstediina (6)
- Order Polystilifera (12)
- Class Nemertea incertae sedis
- Class Palaeonemertea (2)
- Class Pilidiophora (24)
- 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)
