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
           1 Family Ischnochitonidae Dall, 1889
           2 Family Chitonidae Rafinesque, 1815
           3 Family Mopaliidae Dall, 1889
           4 Family Schizochitonidae Dall, 1889