Phylum Schizoramia Bergström, 1976a see Phylum Arthropoda Siebold, 1848 Superclass Crustaceomorpha Chernyshev, 1960 see [unranked] Crustaceomorpha Chernyshev, 1960 Class †Pseudocrustacea Størmer, 1944 Order †Agnostida Salter, 1864