Between brackets is the number of accepted extant species
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Shows the number of accepted extant species within the taxon
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- Biota (12 685)
- Kingdom Animalia (9 791)
- Phylum Acanthocephala (30)
- Phylum Annelida (617)
- 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)
- Subphylum Aculifera
- Subphylum Conchifera
- Subphylum Placophora accepted as Polyplacophora
- Superclass Aplacophora
- Class Bivalvia (125)
- Subclass Autobranchia (99)
- Infraclass Heteroconchia (53)
- Infraclass Pteriomorphia (46)
- Superorder Eupteriomorphia
- Order Arcida (25)
- Order Limida (5)
- Order Mytilida (6)
- Order Ostreida
- Order Pectinida (10)
- Superfamily Pectinoidea Rafinesque, 1815 (10)
- Family Cyclochlamydidae Dijkstra & Maestrati, 2012 (4)
- Family Pectinidae Rafinesque, 1815 (5)
- Subfamily Camptonectinae Habe, 1977 (3)
- Subfamily Palliolinae Korobkov, 1960 (1)
- Tribe Adamussiini T. Habe, 1977 (1)
- Tribe Palliolini Korobkov, 1960
- Genus Palliolum Monterosato, 1884
- Species Palliolum clathratum (E. von Martens, 1881) accepted as Cyclochlamys martensi (Dijkstra, 1998)
- Genus Pseudamussium Mörch, 1853
- Subfamily Pectinidae incertae sedis
- Subfamily Pedinae Bronn, 1862 (1)
- Genus Pseudamusium [sic] accepted as Pseudamussium Mörch, 1853
- Family Propeamussiidae Abbott, 1954 (1)
- Order Pteriida accepted as Ostreida
- Subclass Protobranchia (26)
- Class Caudofoveata (1)
- Class Cephalopoda (80)
- Class Gastropoda (426)
- Class Monoplacophora
- Class Polyplacophora (12)
- Class Scaphopoda (11)
- Class Solenogastres (98)
- Subclass Chaetodermomorpha accepted as Caudofoveata
- 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)
