|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Bivalvia - Cardiida - Veneridae
It was replaced with Paradione by Dall (1886); it was reranked as Macrocallista (Chionella) by Vaughn (1921); it was reranked as Pitar (Chionella) by Mandic and Steininger (2003).
It was assigned to Macrocallista by Vaughn (1921); to Veneroida by Sepkoski (2002); and to Pitar by Mandic and Steininger (2003).
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.