Wikipedia
Hebetoxyites
Hebetoxyites is a fossil ammonoid cephalopod from the middle part of the Bajocian stage, middle Jurassic, included in the Strigoceratidae, Haplocerataceae. The shell is oxyconic, with a sharp rim but no keel, and involute, with the inner whorls hidden. The unbilicus is very small. Sides have a spiral ridge but are not strigate.