| Shastoceras Temporal range: Lower Aptian Aptian |
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|---|---|
| Shastoceras behemoth & S. californicum | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | Ammonoidea |
| Family: | Heteroceratidae |
| Genus: | Shastoceras Anderson, 1938 |
| Species | |
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Shastoceras ("Shasta's horn") is an extinct genus of ammonite cephalopod found in Lower Aptian sediments in Northern California.
It, like its close relative, Annuloceras, is a heteromorph ammonite that strongly resembles Macroscaphites.