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
             Subfamily Ischnochitoninae Dall, 1889 see Family Ischnochitonidae Dall, 1889
               1 Genus Ischnochiton Gray, 1847
               2 Genus Stenochiton H. Adams & Angas, 1864
               3 Genus Stenoplax Dall, 1878
               4 Genus Lepidozona Pilsbry, 1892
               5 Genus Connexochiton Kaas, 1979
               6 Genus Thermochiton Saito & Okutani, 1990
               7 Genus Vermichiton Kaas, 1991