|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Cephalopoda - Ammonitida - Holcodiscidae
It was assigned to Holcodiscidae by Haas (1960); to Barremitinae by Wright et al. (1996); to Ammonoidea by Imlay (1960) and Sepkoski (2002); and to Spitidiscinae by Rawson and Aguirre-Urreta (2012).
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.