|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Bivalvia - Cardiida - Montacutidae
It was synonymized subjectively with Lasaeidae by Parker (1982), Coan et al. (2000) and Bouchet et al. (2010).
It was assigned to Leptonacea by Newell (1965); to Galeommatacea by Vokes (1980) and Beu et al. (1990); and to Leptonoidea by Marquet (2005) and Nevesskaja (2009).
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.