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 Chitonina Thiele, 1909
           Family Ischnochitonidae Dall, 1889
             1 Subfamily Ischnochitoninae Dall, 1889 see Family Ischnochitonidae Dall, 1889
             2 Subfamily Callistoplacinae Pilsbry, 1893 see Family Callistoplacidae Pilsbry, 1893
             3 Subfamily Chaetopleurinae Plate, 1899 see Family Chaetopleuridae Plate, 1899
             4 Subfamily Callochitoninae Plate, 1901 see Family Callochitonidae Plate, 1901
             5 Subfamily Lepidochitoninae Iredale, 1914
             6 Subfamily Schizoplacinae Bergenhayn, 1955 [monotypic] see Family Schizoplacidae Bergenhayn, 1955