Phylum Schizoramia Bergström, 1976a see Phylum Arthropoda Siebold, 1848
   Superclass †Proschizoramia Hou & Bergström, 1997
     Class †Paracrustacea Hou & Bergström, 1997
       Order †Canadaspidida Novozhilov, 1960 see Order Hymenocarina Clarke, 1882
         Family †Perspicarididae Briggs, 1978
           Genus †Perspicaris Briggs, 1977
             ?†Perspicaris laevigata Hou & Bergström, 1991 see Canadaspis laevigata (Hou & Bergström, 1991)