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 Veneroidea Rafinesque, 1815
           Family Veneridae Rafinesque, 1815 - venus clams
             Subfamily Meretricinae Gray, 1847
               Genus Tivela Link, 1807
                 1 Subgenus Comus Cox, 1930
                 2 Subgenus Eutivela Dall, 1891
                 3 Subgenus Pachydesma Conrad, 1854
                 4 Subgenus Planitivela Olsson, 1961