|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Bivalvia - Cardiida - Cardiidae
It was reranked as Cardium (Protocardium) by McCoy (1877); it was corrected as Protocardia by Ronchetti (1970), Vokes (1980) and Schneider (1995); it was reranked as Cardium (Protocardia) by Gabb (1881) and Scholz et al. (2008).
It was assigned to Cardium by McCoy (1877) and Gabb (1881); to Protocardiinae by Vokes (1980), Vokes (1980) and Schneider (1995); to Veneroida by Sepkoski (2002); and to Cardiidae by Ronchetti (1970) and Scholz et al. (2008).
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