|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Cephalopoda - Ammonitida - Stephanoceratidae
It was reranked as Ermoceras (Kosmermoceras) by Arkell (1952).
It was assigned to Ermoceras by Arkell (1952); to Stephanoceratidae by Arkell et al. (1957); and to Ammonoidea 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.