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)
- 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)
- 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)
- Superfamily Mytiloidea Rafinesque, 1815 (6)
- Family Modiolidae G. Termier & H. Termier, 1950 (1)
- Subfamily Limnoperninae Scarlato & Starobogatov, 1979 (1)
- Subfamily Modiolinae G. Termier & H. Termier, 1950
- Genus Modiolus Lamarck, 1799
- Family Mytilidae Rafinesque, 1815 (5)
- Order Ostreida
- Order Pectinida (10)
- 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)
