Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Polyplacophora Blainville, 1816 [monotypic] - chitons
     Subclass Polyplacophora Gray, 1821 [monotypic] see Class Polyplacophora Blainville, 1816
       Order Lepidopleurida Thiele, 1910
         Suborder Acanthochitonina Bergenhayn, 1930
           Family Acanthochitonidae Pilsbry, 1893
             Subfamily Acanthochitoninae Pilsbry, 1893 see Family Acanthochitonidae Pilsbry, 1893
               1 Genus Cryptoconchus Burrow, 1815
               2 Genus Acanthochitona Gray, 1821
               3 Genus Notoplax H. Adams, 1862
               4 Genus Choneplax Dall, 1882
               5 Genus Craspedochiton Shuttleworth, 1853
               6 Genus Gymnoplax Gray, 1821