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 (247 559)
- Kingdom Animalia (211 523)
- Subkingdom Animalia incertae sedis
- Subkingdom Metazoa accepted as Animalia
- Phylum Acanthocephala (516)
- Phylum Annelida (14 107)
- Phylum Arthropoda (59 755)
- Subphylum Arthropoda incertae sedis (1)
- Subphylum Chelicerata (3 065)
- Subphylum Crustacea (56 607)
- Superclass Allotriocarida (1 851)
- Superclass Multicrustacea (47 800)
- Class Copepoda (11 686)
- Class Hexanauplia accepted as Thecostraca
- Class Malacostraca (34 231)
- Class Tantulocarida (39)
- Class Thecostraca (1 844)
- Subclass Ascothoracida (118)
- Subclass Cirripedia (1 710)
- Infraclass Acrothoracica (70)
- Infraclass Rhizocephala (290)
- Infraclass Thoracica (1 350)
- Superorder Phosphatothoracica (8)
- Superorder Thoracicalcarea (1 342)
- Order Balanomorpha (679)
- Superfamily Balanoidea Leach, 1817 (465)
- Superfamily Balanomorphoidea Newman & Ross, 1976 accepted as Coronuloidea Leach, 1817
- Superfamily Chionelasmatoidea Buckeridge, 1983 accepted as Chthamaloidea Darwin, 1854
- Superfamily Chthamaloidea Darwin, 1854 (93)
- Family Catophragmidae Utinomi, 1968 (3)
- Family Chionelasmatidae Buckeridge, 1983 (5)
- Family Chthamalidae Darwin, 1854 (52)
- Family Pachylasmatidae Utinomi, 1968 (30)
- Subfamily Eolasmatinae Buckeridge, 1983 (3)
- Subfamily Metalasmatinae Jones, 2000 (1)
- Subfamily Pachylasmatinae Utinomi, 1968 (26)
- Genus Atetrapachylasma Newman & Jones, 2011 (1)
- Genus Eurylasma Jones, 2000 (3)
- Genus Eutomolasma Jones, 2000 (4)
- Genus Microlasma Jones, 2000 (4)
- Genus Pachylasma Darwin, 1854 (8)
- Species Pachylasma arwetergum Rosell, 1991 accepted as Microlasma arwetergum (Rosell, 1991)
- Species Pachylasma aurantiacum Darwin, 1854 accepted as Tetrapachylasma aurantiacum (Darwin, 1854)
- Species Pachylasma bacum Jones, 2000
- Species Pachylasma chinense Pilsbry, 1912 accepted as Eutomolasma chinense (Pilsbry, 1912)
- Species Pachylasma crinoidophilum Pilsbry, 1911 accepted as Microlasma crinoidophilum (Pilsbry, 1911)
- Species Pachylasma darwinianum Pilsbry, 1912
- Species Pachylasma ecaudatum Hiro, 1939
- Species Pachylasma ferrugomaculosa Jones, 1993 accepted as Tetrapachylasma ferrugomaculosa (Jones, 1993)
- Species Pachylasma giganteum (Philippi, 1836)
- Species Pachylasma integrirostrum Broch, 1931
- Species Pachylasma japonicum Hiro, 1933 accepted as Eutomolasma japonicum (Hiro, 1933)
- Species Pachylasma laeviscutum Jones, 2000
- Species Pachylasma ochriderma Foster, 1981 accepted as Microlasma ochriderma (Foster, 1981)
- Species Pachylasma ovatum Jones, 2000
- Species Pachylasma scutistriata Broch, 1922
- Genus Pseudoctomeris Poltarukha, 1996 (1)
- Genus Tetrapachylasma Foster, 1988 (5)
- Family Waikalasmatidae Ross & Newman, 2001 (3)
- Superfamily Coronuloidea Leach, 1817 (111)
- Superfamily Elminioidea Chan, Dreyer, Gale, Glenner, Ewers-Saucedo, Pérez-Losada, Kolbasov, Crandall & Høeg, 2021 (10)
- Superfamily Pachylasmatoidea Utinomi, 1968 accepted as Coronuloidea Leach, 1817
- Superfamily Tetraclitoidea Gruvel, 1903 accepted as Coronuloidea Leach, 1817
- Order Calanticomorpha (61)
- Order Pollicipedomorpha (10)
- Order Scalpellomorpha (507)
- Order Verrucomorpha (85)
- Order Lepadiformes accepted as Lepadoidea Chan, Dreyer, Gale, Glenner, Ewers-Saucedo, Pérez-Losada, Kolbasov, Crandall & Høeg, 2021
- Order Pedunculata
- Order Scalpelliformes represented as Scalpellomorpha
- Order Sessilia
- Subclass Facetotecta (16)
- Superclass Oligostraca (6 956)
- Class Maxillopoda
- Subphylum Myriapoda (82)
- Subphylum Pancrustacea accepted as Crustacea
- Subphylum Tetraconata accepted as Crustacea
- Phylum Aschelminthes
- Phylum Brachiopoda (408)
- Phylum Bryozoa (6 533)
- Phylum Cephalorhyncha
- Phylum Chaetognatha (132)
- Phylum Chordata (24 096)
- Phylum Cnidaria (12 578)
- 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 (52 044)
- Phylum Nematoda (6 758)
- Phylum Nematomorpha (5)
- Phylum Nemertea (1 334)
- 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 (13 497)
- 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)
