Subfamily Americunioninae Guo 1986 (clam)
Parent taxon: Trigonioidoidea according to P. Bouchet et al. 2010
Sister taxa: Jilinoconchidae, Nakamuranaiadidae, Nippononaiidae, Plicatounionidae, Pseudohyriidae, Sainschandiidae, Trigonioididae
Subtaxa: none
Ecology: facultatively mobile infaunal suspension feeder
Distribution: there are no occurrences of Americunioninae in the database