Asteroceras
| Asteroceras Temporal range: Late Triassic-Early Jurassic | |
|---|---|
| Asteroceras fossil from Dorset, England. | |
| Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | †Ammonoidea |
| Order: | †Ammonitida |
| Family: | †Arietitidae |
| Subfamily: | †Asteroceratinae |
| Genus: | †Asteroceras Hyatt, 1867 |
Asteroceras ("star horn") is an extinct genus of cephalopod belonging to the Ammonite subclass. These fast-moving nektonic carnivores lived during the Triassic and Jurassic periods (from 205.6 to 189.6 Ma).