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 †Canadaspididae Novozhilov, 1960
Genus †Canadaspis Novozhilov, in Orlov, 1960
†Canadaspis perfecta (Walcott, 1912)