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)
- Phylum Nematoda (396)
- Phylum Nemertea (75)
- Phylum Nemertina represented as Nemertea
- Phylum Platyhelminthes (134)
- Subphylum Platyhelminthes incertae sedis
- Subphylum Rhabditophora (134)
- Superclass Neodermata (129)
- Class Cestoda (70)
- Class Monogenea (2)
- Class Trematoda (57)
- Subclass Digenea (57)
- Order Digenea incertae sedis
- Order Diplostomida (3)
- Order Echinostomida accepted as Plagiorchiida
- Order Plagiorchiida (54)
- Suborder Apocreadiata
- Suborder Bucephalata
- Suborder Echinostomata (1)
- Suborder Gymnophallata (3)
- Suborder Hemiurata (11)
- Superfamily Azygioidea Lühe, 1909 (1)
- Superfamily Hemiuroidea Looss, 1899 (10)
- Family Bunocotylidae Dollfus, 1950 (1)
- Family Derogenidae Nicoll, 1910 (2)
- Family Gonocercidae Skrjabin & Guschanskaja, 1955 (1)
- Family Hemiuridae Looss, 1899 (3)
- Subfamily Aphanurinae Skrjabin & Guschanskaja, 1954
- Subfamily Elytrophallinae Skrjabin & Guschanskaja, 1955 (1)
- Subfamily Glomericirrinae Yamaguti, 1958 (1)
- Genus Glomericirrus Yamaguti, 1937 (1)
- Subfamily Hemiurinae Looss, 1899
- Subfamily Lecithochiriinae Lühe, 1901 (1)
- Family Lecithasteridae Odhner, 1905 (2)
- Family Lecithophyllidae Skrjabin & Guschanskaja, 1954 (1)
- Suborder Lepocreadiata (15)
- Suborder Monorchiata (1)
- Suborder Opisthorchiata (1)
- Suborder Pronocephalata (3)
- Suborder Xiphidiata (19)
- Order Strigeida accepted as Diplostomida
- Order Prolecithophora (1)
- Order Prorhynchida (1)
- Order Proseriata (1)
- Order Rhabdocoela
- Order Tricladida (2)
- Class Turbellaria
- 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)
