Bivalvia - Cardiida - Cardiidae
Parent taxon: Trachycardium according to E. J. Moore 2003
See also Adegoke 1977, Coan et al. 2000, Marasti 1973, Olsson 1967 and Woodring 1982
Sister taxa: Cardium (Trachycardium) greenhoughi, Cardium (Trachycardium) mamillatum, Cardium (Trachycardium) minbuense, Cardium (Trachycardium) polycolpatum, Cardium (Trachycardium) protosubrugosum, Cardium (Trachycardium) riachuelense, Cardium (Trachycardium) sindiense, Trachycardium (Mexicardia), Trachycardium (Phlogocardia), Trachycardium (Regozara), Trachycardium cotteri, Trachycardium egmontianum, Trachycardium enode, Trachycardium eufaulensis, Trachycardium eversum, Trachycardium halaense, Trachycardium kinsmarae, Trachycardium lacunosum, Trachycardium mollyni, Trachycardium multiradiatum, Trachycardium planicostata, Trachycardium puelchum, Trachycardium reynoldsi, Trachycardium rugosum, Trachycardium syriacum, Trachycardium thalassium, Cardium (Granocardium) sabulosum
Subtaxa: Trachycardium (Trachycardium) arcumbona Trachycardium (Trachycardium) brantlyi Trachycardium (Trachycardium) consors Trachycardium (Trachycardium) isocardia Trachycardium (Trachycardium) pessoae Trachycardium (Trachycardium) schencki
Ecology: facultatively mobile infaunal suspension feeder
Distribution:
• Quaternary of the Dominican Republic (1 collection), Mexico (3), United States (6: Florida, North Carolina, South Carolina), Venezuela (1)
• Pliocene of Jamaica (1), United States (5: Florida), Venezuela (7)
• Miocene of Brazil (3), Colombia (1), the Dominican Republic (4), Panama (5), United States (4: California, Florida)
• Cretaceous of United States (9: Delaware, Texas)
Total: 50 collections each including a single occurrence