Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Bivalvia Linnaeus, 1758 - bivalves
     Subclass Heterodonta Neumayr, 1884 see Clade Heterodonta Neumayr, 1884
       Order Venerida Gray, 1854
         Superfamily Galeommatoidea Gray, 1840
           Family Montacutidae Clark, 1855 see Family Lasaeidae Gray, 1842
             1 Subfamily Montacutinae Clark, 1855
             2 Subfamily Mysellinae
             3 Subfamily Orobitellinae Bernard, 1983
             4 Subfamily Thecodontinae Bernard, 1983