Arctoptychites is an extinct cephalopod genus belonging to the ceratitid

Ceratitida

The Ceratitida is an order that contains almost all ammonoid cephalopod genera from the Triassic as well as ancestral forms from the Upper Permian, the exception being the phylloceratids which gave rise to the great diversity of post Triassic ammonites....

 family Ptychitidae, and related to such genera as Ptychites and Aristoptychites

Aristoptychites

Aristoptychites is an extinct genus of cephalopod belonging to the Ammonite subclass....

; all from the Triassic. [1]

The Ptychitidae, to which Arctoptychites belongs, is a family of ceratitid ammonites (sensu latu) with ammonitic sutures and variably subglobular to compressed, ribbed or smooth, generally evolute shells. [2]

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[1] Arctoptychites Paleodb

[2] Treatise on Invertebrate Paleontology, Part L (1957),Mesozoic Ammonoidea p.L180.