Bivalvia - Cardiida - Cardiidae
Alternative spellings: Cardium (Ringicardium), Cardium (Ringicardum)
Parent taxon: Cardiidae according to A. J. W. Hendy et al. 2008
Sister taxa: 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, Sawkinsia, Serripes, Stylodacna, Trachycardiinae, Trachycardium, Vietnamicardium
Subtaxa: Ringicardium harrisi, Ringicardium procerum, Ringicardium restinense, Ringicardium ringens
Type: Cardium ringens
Ecology: facultatively mobile infaunal suspension feeder