Bivalvia - Cardiida - Cardiidae
Alternative spelling: Keenocardium
Parent taxon: Clinocardium according to E. J. Moore 2003
See also Coan et al. 2000 and Sepkoski 2002
Sister taxa: Clinocardium (Clinocardium), Clinocardium blandum, Clinocardium bulowi, Clinocardium comoxense, Clinocardium fucanum, Clinocardium okushirense, Clinocardium scapoosense, Clinocardium sookensis, Clinocardium yakatagense
Subtaxa: Clinocardium (Keenocardium) blandum Clinocardium (Keenocardium) californiense Clinocardium (Keenocardium) lispum Keenocardium starobogatovi
Ecology: facultatively mobile infaunal suspension feeder
Distribution:
• Quaternary of United States (3: Alaska, California collections)
• Pliocene of Japan (3), the Russian Federation (2)
• Miocene of the Russian Federation (11)
• Oligocene of the Russian Federation (3)
Total: 22 collections including 27 occurrences