|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Gastropoda - Fissurellidae
It was reranked as Hemitoma (Montfortia) by Knight et al. (1960), Ladd (1966) and Todd (2001).
It was assigned to Hemitoma by Knight et al. (1960), Ladd (1966) and Todd (2001); and to Archaeogastropoda 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.