Bivalvia - Cardiida - Cardiidae
Alternative spelling: Titanocardium
Full reference: P. A. Maxwell. 1978. Taxonomic and nomenclatural notes on some New Zealand Cenozoic Mollusca, with descriptions of new taxa. New Zealand Journal of Zoology 5(1):15-46
Parent taxon: Hedecardium according to J. A. Schneider 2002
See also Maxwell 1978 and Sepkoski 2002
Sister taxa: Hedecardium (Hedecardium), Hedecardium (Iheringicardium), Hedecardium collinsi, Hedecardium greyi, Hedecardium ogurai, Hedecardium septuagenarium, Hedecardium subcordatum, Hedecardium waitakiense, Vepricardium (Hedecardium) sharpei
Subtaxa: Hedecardium (Titanocardium) cantuariense Hedecardium (Titanocardium) greyi Hedecardium (Titanocardium) marwicki
Ecology: facultatively mobile infaunal suspension feeder
Distribution:
• Miocene of New Zealand (2 collections)
• Oligocene of New Zealand (4)
Total: 6 collections each including a single occurrence