Phylum Schizoramia Bergström, 1976a
see Phylum Arthropoda Siebold, 1848
Superclass Crustaceomorpha Chernyshev, 1960
see [unranked] Crustaceomorpha Chernyshev, 1960
Class †Pseudocrustacea Størmer, 1944
Order †Waptiida Størmer, 1944, nom. corr.
see Order Hymenocarina Clarke, 1882
Family †Waptiidae Walcott, 1912, nom. corr.
Genus †Plenocaris Whittington, 1974
1 †Plenocaris plena