Between brackets is the number of accepted marine extant species
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Shows the number of accepted marine extant species within the taxon
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- Biota (247 582)
- Kingdom Animalia (211 546)
- Subkingdom Animalia incertae sedis
- Subkingdom Metazoa accepted as Animalia
- Phylum Acanthocephala (516)
- Phylum Annelida (14 110)
- Phylum Arthropoda (59 761)
- Phylum Aschelminthes
- Phylum Brachiopoda (408)
- Phylum Bryozoa (6 533)
- Phylum Cephalorhyncha
- Phylum Chaetognatha (132)
- Phylum Chordata (24 096)
- Phylum Cnidaria (12 585)
- Phylum Ctenophora (184)
- Phylum Cycliophora (2)
- Phylum Dicyemida (122)
- Phylum Echinodermata (7 646)
- Phylum Ectoprocta accepted as Bryozoa
- Phylum Entoprocta (202)
- Phylum Gastrotricha (523)
- Phylum Gnathostomulida (100)
- Phylum Hemichordata (137)
- Phylum Kinorhyncha (348)
- Phylum Loricifera (46)
- Phylum Mesozoa accepted as Dicyemida
- Phylum Mollusca (52 048)
- Phylum Nematoda (6 759)
- Phylum Nematomorpha (5)
- Phylum Nemertea (1 335)
- Superclass Neonemertea
- Superclass Pronemertea
- Class Anopla accepted as Nemertea incertae sedis
- Class Arhynchocoela (1)
- Class Enopla accepted as Hoplonemertea
- Class Hoplonemertea (723)
- Order Bdellomorpha accepted as Malacobdellidae Blanchard, 1847
- Order Monostilifera (575)
- Order Polystilifera (148)
- Suborder Pelagica (96)
- Family Armaueriidae Brinkmann, 1917 (11)
- Family Balaenanemertidae Coe, 1945 accepted as Pelagonemertidae Moseley, 1875
- Family Bathynemertidae Brinkmann, 1917 accepted as Protopelagonemertidae Brinkmann, 1917
- Family Buergeriellidae Brinkmann, 1917 (1)
- Family Chuniellidae Brinkmann, 1917 accepted as Nectonemertidae Verrill, 1892
- Family Dinonemertidae Brinkmann, 1917 (15)
- Family Nectonemertidae Verrill, 1892 (12)
- Family Pachynemertidae Coe, 1954 (1)
- Family Pelagonemertidae Moseley, 1875 (34)
- Family Pendonemertidae Chernyshev, 2011 (1)
- Family Phallonemertidae Brinkmann, 1917 (1)
- Family Planktonemertidae Brinkmann, 1917 (13)
- Genus Chunianna Coe, 1954 accepted as Coeiana Chernyshev, 1992
- Species Chunianna opaca Coe, 1954 accepted as Coeiana opaca (Coe, 1954)
- Species Chunianna pacifica Coe, 1954 accepted as Leonoviana pacifica (Coe, 1954)
- Genus Coeiana Chernyshev, 1992 (1)
- Genus Crassonemertes Brinkmann, 1917 (2)
- Genus Leonoviana Chernyshev, 1992 (1)
- Genus Mergonemertes Brinkmann, 1917 (1)
- Genus Mononemertes Coe, 1926 (2)
- Genus Neuronemertes Coe, 1926 (1)
- Genus Planktonemertes Woodworth, 1899 (3)
- Genus Plenanemertes Coe, 1954 (1)
- Genus Tononemertes Coe, 1954 (1)
- Family Protopelagonemertidae Brinkmann, 1917 (6)
- Genus Bathynemertes Laidlaw, 1906 (1)
- Suborder Reptantia (52)
- Order Urichorhynchocoela accepted as Hoplonemertea
- Suborder Polystiliferoidea accepted as Polystilifera
- Class Nemertea incertae sedis (10)
- Class Palaeonemertea (120)
- Class Pilidiophora (481)
- Order Mesonemertini accepted as Palaeonemertea
- Order Protonemertini accepted as Palaeonemertea
- Phylum Nemertina represented as Nemertea
- Phylum Nemertini accepted as Nemertea
- Phylum Orthonectida (24)
- Phylum Pentastomida accepted as Pentastomida
- Phylum Phoronida (13)
- Phylum Placozoa (4)
- Phylum Platyhelminthes (13 498)
- Phylum Pogonophora accepted as Siboglinidae Caullery, 1914
- Phylum Porifera (9 468)
- Phylum Priapulida (22)
- Phylum Rotatoria accepted as Rotifera
- Phylum Rotifera (219)
- Phylum Sipunculida accepted as Sipuncula
- Phylum Tardigrada (263)
- Phylum Xenacoelomorpha (437)
- Kingdom Archaea (117)
- Kingdom Bacteria (2 223)
- Kingdom Chromista (20 791)
- Kingdom Fungi (1 432)
- Kingdom Monera represented as Bacteria
- Kingdom Plantae (10 581)
- Kingdom Protozoa (766)
- Kingdom Viruses (115)
