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 †Waptia Walcott, 1912
             †Waptia fieldensis Walcott