Subclass Phyllocarida Packard 1879 (crustacean)
Parent taxon: Malacostraca according to D. E. G. Briggs et al. 2004
Sister taxa: Aeschronectida, Belotelsonidea, Cumacea, Eocaridacea, Eucarida, Eumalacostraca, Hoplocarida, Hoplostraca, Hymenostraca, Isopoda, Lophogastrida, Palaeocaridacea, Palaeostomatopoda, Silesicaris, Tanaidacea, Waterstonellidea
Subtaxa: Aptychopsis, Archaeostraca, Caryocarididae, Discinocaris, Leptostraca, Peltocaris, Proboscicaris, Protocimex, Tuzoia
Ecology: nektobenthic carnivore