|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Cephalopoda - Ammonitida - Acanthoceratidae
It was reranked as Calycoceras (Eucalycoceras) by Collignon (1937).
It was assigned to Calycoceras by Collignon (1937); to Acanthoceratidae by Cobban (1988); to Acanthoceratinae by Kennedy (1994) and Kennedy et al. (1996); and to Ammonoidea by Sepkoski (2002).
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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.