| Haydenoceras Temporal range: Middle Devonian | |
|---|---|
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | Nautiloidea |
| Order: | † Tarphycerida |
| Family: | † Barrandeoceratidae |
| Genus: | † Haydenoceras Flower, 1949 |
Haydenoceras is a genus of middle Devonian cephalopods originally placed in the Barrandeocerida. The genus can be recognized by its strongly compressed, gradually expanding exogastrically curved shell with a strongly rounded dorsum and acutely angled venter, calling attention to the general form of earlier Bassleroceras . The siphuncle is tubular, central.
Related genera include Avilionella , Barrandeoceras , Gasconsoceras, Laureloceras, and Savageoceras .
