Phylum Schizoramia Bergström, 1976a see Phylum Arthropoda Siebold, 1848
   Superclass Crustaceomorpha Chernyshev, 1960 see [unranked] Crustaceomorpha Chernyshev, 1960
     Class †Pseudocrustacea Størmer, 1944
       1 Order †Agnostida Salter, 1864
       2 Order †Waptiida Størmer, 1944, nom. corr. see Order Hymenocarina Clarke, 1882
       2.0 Order †Waptida Størmer, 1944 see Order Waptiida Størmer, 1944, nom. corr.
       3 Order †Phosphatocopida Müller, 1964
       4 Genus †Combinivalvula Hou, 1987