Olcostephanus
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| Olcostephanus | |
|---|---|
 | |
| Fossil of Olcostephanus astierianus from France, on display at Galerie de paléontologie et d'anatomie comparée in Paris | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | †Ammonoidea |
| Order: | †Ammonitida |
| Family: | †Olcostephanidae |
| Genus: | †Olcostephanus Neumayr, 1875 |
| Synonyms | |
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Olcostephanus is an extinct ammonoid cephalopod genus belonging to the family Olcostephanidae. These fast-moving nektonic carnivores[1] lived during the Cretaceous, from the upper Valanginian to the lower Hauterivian age.[2][1][3]
