Subfamily Spheniinae Frank Bernard 1983 (softshell clam)
Parent taxon: Myidae according to J. G. Carter et al. 2011
See also Bouchet et al. 2010
Sister taxa: Cryptomya, Cryptomyinae, Mya, Myinae, Paramya, Platyodon, Sphenia, Tugonia, Venatomya
Subtaxa: none
Ecology: facultatively mobile infaunal suspension feeder
Distribution: there are no occurrences of Spheniinae in the database