|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Cephalopoda - Ammonitida - Polymorphitidae
It was assigned to Acanthopleuroceratinae by Braga and Rivas (1985), Thomson and Smith (1992), Smith and Tipper (1996) and Sepkoski (2002); to Acanthopleuroceratidae by Hillebrandt (2006); and to Tropidoceratinae by Howarth (2013).
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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.