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
Genus Fossula Lea, 1870