†family Chaenocardiidae Miller 1889 (clam)
Parent taxon: Chaenocardioidea according to J. G. Carter et al. 2011
Sister taxon: Streblochondriidae
Subtaxa: Chaenocardia, Eurydesma, Obliquipecten, Saturnopecten
Ecology: stationary epifaunal suspension feeder