Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Mollusca Linnaeus, 1758 - molluscs
     Class Polyplacophora Blainville, 1816 - chitons
       Order Ischnochitonida Bergenhayn, 1930 see Order Chitonida Thiele, 1909
         Genus Callistochiton Dall, 1882
         Genus Chaetopleura Shuttleworth, 1853
         Genus Ischnochiton Gray, 1847
         Genus Mopalia Gray, 1847
         Genus Placiphorella Dall, 1879
         Genus Schizoplax Dall, 1878