Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Bivalvia Linnaeus, 1758 - bivalves
     Subclass Heterodonta Neumayr, 1884 see Clade Heterodonta Neumayr, 1884
       Order Chamida see Order Venerida Gray, 1854
         Superfamily Tellinoidea Blainville, 1814
           Family Psammobiidae Fleming, 1828 - sunset clams
             Subfamily Psammobiinae Fleming, 1828
               Genus Asaphis Modeer, 1793
                 1 Subgenus Heteroglypta Martens, 1880