Didymoceras

Didymoceras Temporal range: Upper Campanian PreЄ Є O S D C P T J K Pg N
Artist's reconstruction of D. stevensoni, D. nebrascensis, and D. cheyennese
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Cephalopoda
Subclass:	†Ammonoidea
Suborder:	†Ancyloceratina
Superfamily:	†Turrilitaceae
Family:	†?
Genus:	†Didymoceras Hyatt, 1894
Species
See text
Synonyms
Cirroceras Conrad, 1866 Helicoceras d'Orbigny, 1842 Helicoceras Whitfield, 1877 Emperoceras Hyatt, 1894 Didymoceratoides Kennedy & Cobban, 1993

See text

Didymoceras is an extinct genus of ammonite cephalopod. 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 Latin for "paired horns".

Its taxonomic place is often in flux, being placed in either Turrilitidae, , or its own family, Didymoceratidae. Species included in the genus are the following: