†order Palaeostomatopoda Brooks 1962 (crustacean)
Parent taxon: Malacostraca according to J. J. Sepkoski 2002
Sister taxa: Aeschronectida, Belotelsonidea, Cumacea, Eocaridacea, Eucarida, Eumalacostraca, Hoplocarida, Hoplostraca, Hymenostraca, Isopoda, Lophogastrida, Palaeocaridacea, Phyllocarida, Silesicaris, Tanaidacea, Waterstonellidea
Subtaxa: Archaeocaris, Bairdops, Eopteridium
Ecology: epifaunal omnivore