Suborder Cardiidina Ferussac 1822 (clam)
Parent taxon: Cardiida according to J. G. Carter et al. 2011
Sister taxa: Anthracosiidina, Gastrochaenidina, Kalenteroidea, Leptonidina
Subtaxa: Cardioidei Palaeocarditidae Veneroidei
Ecology: facultatively mobile infaunal suspension feeder