Phylum Mollusca Linnaeus, 1758 - molluscs
   Subphylum Aculifera Hatschek, 1891
     Class Polyplacophora Blainville, 1816 - chitons
       Order Neoloricata Bergenhayn, 1955 see Subclass Neoloricata Bergenhayn, 1955
         Suborder Ischnochitonina Bergenhayn, 1930 see Suborder Chitonina Thiele, 1909
           Family Chitonidae Rafinesque, 1815
             1 Subfamily Acanthopleurinae Dall, 1889
             2 Subfamily Chitoninae Rafinesque, 1815
             3 Subfamily Toniciinae Pilsbry, 1893