Order Tanaidacea Dana 1849 (crustacean)
Parent taxon: Malacostraca according to J. J. Sepkoski 2002
Sister taxa: Aeschronectida, Belotelsonidea, Cumacea, Eocaridacea, Eucarida, Eumalacostraca, Hoplocarida, Hoplostraca, Hymenostraca, Isopoda, Lophogastrida, Palaeocaridacea, Palaeostomatopoda, Phyllocarida, Silesicaris, Waterstonellidea
Subtaxa: Acadiocaris, Anthracocaris, Apseudidae, Apseudomorpha, Carlclausus, Cretitanais, Eucryptocaris, Palaeotanais
Ecology: epifaunal omnivore