Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Bivalvia Linnaeus, 1758 - bivalves
     Subclass Heterodonta Neumayr, 1884 see Clade Heterodonta Neumayr, 1884
       Order Venerida Gray, 1854
         Superfamily Lucinoidea Fleming, 1828
           1 Family Lucinidae Fleming, 1828 - lucines
           2 Family Fimbriidae Nicol, 1950 (1870) see Subfamily Fimbriinae Nicol, 1950 (1870)
           3 Family Mactromyidae Cox, 1929 (1887) [monotypic]
           4 Family Thyasiridae Dall, 1900 (1895)
           5 Family Ungulinidae Gray, 1854
           6 Family Cyrenoididae Adams & Adams, 1857 (1853) [monotypic]