Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Bivalvia Linnaeus, 1758 - bivalves
     Subclass Palaeoheterodonta Newell, 1965 see Clade Palaeoheterodonta Newell, 1965
       Order Unionida Gray, 1854
         Superfamily Muteloidea Gray, 1847 see Superfamily Etherioidea Deshayes, 1832
           Family Mycetopodidae Gray, 1840
             Subfamily Monocondylaeinae Modell, 1942
               1 Genus Monocondylaea d'Orbigny, 1835
               2 Genus Fossula Lea, 1870
               3 Genus Haasica Strand, 1932
               4 Genus Tamsiella Haas, 1931