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 (879)
- Kingdom Animalia (681)
- Phylum Annelida (119)
- Phylum Arthropoda (168)
- Subphylum Chelicerata (6)
- Subphylum Crustacea (162)
- Superclass Allotriocarida (28)
- Superclass Multicrustacea (134)
- Class Copepoda (16)
- Class Hexanauplia accepted as Thecostraca
- Class Malacostraca (113)
- Class Thecostraca (5)
- Subclass Cirripedia (5)
- Infraclass Thoracica (5)
- Superorder Thoracicalcarea (5)
- Order Balanomorpha (5)
- Superfamily Balanoidea Leach, 1817 (4)
- Family Balanidae Leach, 1817 (4)
- Subfamily Amphibalaninae Pitombo, 2004 (2)
- Genus Amphibalanus Pitombo, 2004 (2)
- Species Amphibalanus amphitrite (Darwin, 1854)
- Species Amphibalanus improvisus (Darwin, 1854)
- Subfamily Balaninae Leach, 1817
- Subfamily Megabalaninae Leach, 1817 (2)
- Superfamily Coronuloidea Leach, 1817
- Superfamily Elminioidea Chan, Dreyer, Gale, Glenner, Ewers-Saucedo, Pérez-Losada, Kolbasov, Crandall & Høeg, 2021 (1)
- Superfamily Tetraclitoidea Gruvel, 1903 accepted as Coronuloidea Leach, 1817
- Order Sessilia
- Phylum Bryozoa (3)
- Phylum Chaetognatha (2)
- Phylum Chordata (276)
- Phylum Cnidaria (5)
- Phylum Ctenophora (3)
- Phylum Echinodermata (7)
- Phylum Kinorhyncha (2)
- Phylum Mollusca (70)
- Phylum Nematoda (1)
- Phylum Platyhelminthes (1)
- Phylum Porifera (2)
- Phylum Rotifera (22)
- Kingdom Bacteria (5)
- Kingdom Chromista (179)
- Kingdom Plantae (14)
- Kingdom Protozoa