living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Eukaryotae see Domain Eukaryota Chatton, 1925
     Kingdom Animalia Linnaeus, 1758 - animals
       Subkingdom Eumetazoa Butschli, 1910 see [unranked] Eumetazoa Bütschli, 1910
         Phylum Mollusca Linnaeus, 1758 - molluscs
           Class Polyplacophora Blainville, 1816 - chitons
             Subclass Neoloricata Bergenhayn, 1955
               Order Ischnochitonida Bergenhayn, 1930 see Order Chitonida Thiele, 1909
                 Family Chitonidae Rafinesque, 1815
                   Genus Tonicia Gray, 1847