Sharpeiceras

Shapeiceras is an Ammonite genus from the Cenomanian stage of the Upper Cretaceous included in the Acanthoceratidae. Its shell is high whorled, moderately evolute, and rather compressed. Ribs are coarse, typical but not always single, each with an umbilical, up to 3 lateral, and a ventrolateral tubercle. Whorl section is quadrate. Graysonites and Mantelliceras, also acanthoceratids, are related.