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 Galeommatidae Gray, 1840
Genus Leiochasmea Dall, Bartsch & Rehder, 1938
Subgenus Achasmea Dall, Bartsch & Rehder, 1938