Family Cardiidae Lamarck 1809 (cockle)
Parent taxon: Cardioidea according to J. G. Carter et al. 2011
Sister taxa: Lahillidae, Lymnocardiidae, Pterocardiidae
Subtaxa: Austrocardium, Cerastoderma, Didacna, Dochmocardia, Goethemia, Granocardium, Hemicardium, Indocardium, Laevicardium, Lahilliinae, Nemocardium, Neocardiids, Obsoletiforma, Papillicardium, Papyridea, Paradacna, Parvicardium, Parvidacna, Pascoella, Patagonicardium, Perucardia, Plagiocardium, Pleuriocardia, Pontalmyra, Protocardiinae, Pseudocatillus, Ringicardium, Sawkinsia, Serripes, Stylodacna, Trachycardiinae, Trachycardium, Vietnamicardium
Ecology: facultatively mobile infaunal suspension feeder