Bivalvia - Cardiida - Cardiidae
Parent taxon: Hedecardium according to J. A. Schneider 2002
Sister taxa: Hedecardium (Iheringicardium), Hedecardium (Titanocardium), Hedecardium collinsi, Hedecardium greyi, Hedecardium ogurai, Hedecardium septuagenarium, Hedecardium subcordatum, Hedecardium waitakiense, Vepricardium (Hedecardium) sharpei
Subtaxa: Hedecardium (Hedecardium) brunneri Hedecardium (Hedecardium) kanlenum Hedecardium (Hedecardium) moniletectum Hedecardium (Hedecardium) olssoni Hedecardium (Hedecardium) pseudomagnum Hedecardium (Hedecardium) subcordatum Hedecardium (Hedecardium) waitakiense
Ecology: facultatively mobile infaunal suspension feeder
Distribution:
• Miocene of Australia (1 collection)
• Oligocene of Australia (1), New Zealand (4)
• Eocene of Australia (3), New Zealand (19)
Total: 28 collections each including a single occurrence