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 1 Genus †Perspicaris Briggs, 1977