Bivalvia - Cardiida - Cardiidae
Parent taxon: Nemocardium according to E. J. Moore 2003
See also Dockery 1982, Kafanov and Ogasawara 2003, Kafanov et al. 2005 and Schneider 1995
Sister taxa: Cardium (Nemocardium) bhagothorense, Cardium (Nemocardium) brasiliense, Nemocardium (Arctopratulum), Nemocardium (Brevicardium), Nemocardium (Divaricardium), Nemocardium (Keenaea), Nemocardium (Lophocardium), Nemocardium (Lyrocardium), Nemocardium (Pratulum), Nemocardium (Trifaricardium), Nemocardium (Varicardium), Nemocardium bechei, Nemocardium cooperii, Nemocardium eugenense, Nemocardium ezoense, Nemocardium granosulcatum, Nemocardium hadraterum, Nemocardium lene, Nemocardium lincolnensis, Nemocardium nicoletti, Nemocardium nicolletti, Nemocardium nitens, Nemocardium parile, Nemocardium patulum, Nemocardium plumsteadianum, Nemocardium salrivale, Nemocardium semiasperum, Nemocardium semitectum, Nemocardium turgidum
Subtaxa: Nemocardium (Nemocardium) diversum Nemocardium (Nemocardium) eocenense Nemocardium (Nemocardium) linteum Nemocardium (Nemocardium) lorenzanum Nemocardium (Nemocardium) yokoyamai
Ecology: facultatively mobile infaunal suspension feeder
Distribution:
• Pliocene of Italy (1 collection)
• Miocene of Indonesia (2), Japan (1), the Russian Federation (3)
• Oligocene of Mexico (3), the Russian Federation (5), United States (60: Alabama, Mississippi, North Carolina)
• Eocene of Japan (1), Mexico (2), New Zealand (1), the Russian Federation (5), United States (86: California, Oregon, Washington)
• Paleocene to Eocene of United States (1: California)
• Paleocene of the Russian Federation (4), United States (20: California)
• Cretaceous of Japan (4), Poland (1), United States (1: Tennessee)
Total: 201 collections including 205 occurrences