Clade Cardiomorphi Ferussac 1822 (clam)
Parent taxon: Heteroconchia according to J. G. Carter et al. 2011
Sister taxa: Archiheterodonta, Eoastartella, Heterodonta, Heterodonta, Lipanellidae, Palaeoheterodonta, Parenia, Paullia, Uniomorphi
Subtaxa: Cardioni Carditioni
Ecology: facultatively mobile infaunal suspension feeder