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 Lepidopleurina Thiele, 1910
           1 Family Leptochitonidae Dall, 1889
           2 Family Hanleyidae Bergenhayn, 1955
           3 Family Afossochitonidae Ashby, 1925 [monotypic] see Family Choriplacidae Ashby, 1928