Trematoceras
| Trematoceras Temporal range: U Triassic | |
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| Subfamily: | Michelinoceratinae |
| Genus: | Trematoceras Eichwald, 1851 |
Trematoceras, from Ancient Greek τρῆμα (trêma), meaning "perforation", and κέρας (kéras), meaning "horn", is an orthoconic nautiloid cephalopod from the Upper Triassic of Europe and Asia named by Eichwald in 1851.