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 Solecurtidae d'Orbigny, 1846 - razor clams
             Subfamily Solecurtinae d'Orbigny, 1846
               Genus Tagelus Gray, 1847
                 1 Subgenus Clunaculum Dall, 1899
                 2 Subgenus Mesopleura Conrad, 1868