|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Cephalopoda - Ammonitida - Hildoceratidae
It was reranked as Arieticeras (Grammoceras) by Gemmellaro (1885); it was reranked as Harpoceras (Grammoceras) by Thevenin (1908).
It was assigned to Arieticeras by Gemmellaro (1885); to Harpoceras by Thevenin (1908); to Ammonoidea by Sepkoski (2002); and to Grammoceratinae 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.