See text Didymoceras is an extinct genus of ammonite cephalopod from the Late Cretaceous epoch (approximately 76 Ma).

It is one of the most bizarrely shaped genera, with a shell that spirals upwards into a loose, hooked tip.

It is thought to have drifted in the water vertically, moving up and down.

The generic name is Greek for "paired horns".

Species included in the genus are the following:[1][2] This Ammonitida-related article is a stub.