Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Bivalvia Linnaeus, 1758 - bivalves
     Subclass Heterodonta Neumayr, 1884 see Clade Heterodonta Neumayr, 1884
       Order Venerida Gray, 1854
         Superfamily Carditoidea Férussac, 1822
           Family Carditidae Férussac, 1822 - little heart shells
             Subfamily Thecaliinae Dall, 1903
               1 Genus Thecalia Adams & Adams, 1857
               2 Genus Milneria Dall, 1881