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
           Family Leptochitonidae Dall, 1889
             Subfamily Leptochitoninae Dall, 1889 see Family Leptochitonidae Dall, 1889
               Genus Leptochiton Gray, 1847
                 Subgenus Parachiton Thiele, 1909 see Genus Parachiton Thiele, 1909