|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Bivalvia - Cardiida - Cardiidae
It was reranked as Nemocardium (Frigidocardium) by Schneider (1995).
It was assigned to Cardiidae by Lamprell and Whitehead (1992); to Nemocardium by Schneider (1995); to Veneroida by Sepkoski (2002); and to Protocardiinae by Vokes (1980) and Poutiers (2006).
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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.