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|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Bivalvia - Cardiida - Cardiidae
It was Cardium (Mexicardia) by Pilsbry and Olsson (1941); it was reranked as Mexicardia by Sepkoski (2002).
It was assigned to Cardium by Pilsbry and Olsson (1941); to Trachycardium by Woodring (1982) and Vokes (1989); and to Veneroida by Sepkoski (2002).
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.