†subfamily Sinonaiinae Chen 1987 (clam)
Bivalvia - Trigoniida - Nippononaiidae
Parent taxon: Nippononaiidae according to J. G. Carter et al. 2011
See also Bouchet et al. 2010
Sister taxa: Nippononaiinae, Sinonaia
Subtaxa: none
Ecology: facultatively mobile infaunal suspension feeder
Distribution: there are no occurrences of Sinonaiinae in the database