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 Bivalvia Linnaeus, 1758 - bivalves
             Subclass Heterodonta Neumayr, 1884 see Clade Heterodonta Neumayr, 1884
               Order Veneroida H. & A. Adams, 1856 see Order Venerida Gray, 1854
                 Superfamily Arcticacea see Superfamily Arcticoidea Newton, 1891 (1844)
                   1 Family Arcticidae Newton, 1891 (1844)
                   2 Family Trapeziidae Lamy, 1920, nom. illeg. see Family Trapezidae Lamy, 1920 (1895), orth. cons.
                   3 Family Bernardinidae Keen, 1969 see Family Neoleptonidae Thiele, 1934