|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Bivalvia - Arcida - Parallelodontidae
It was reranked as Cosmetodon by Vokes (1980) and Sepkoski (2002).
It was assigned to Grammatodon by Branson (1942); to Grammatodontinae by Vokes (1980); and to Arcoida by Sepkoski (2002).
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.