Estonioceras
| Estonioceras Temporal range: Ordovician | |
|---|---|
| Estonioceras, found in the uppermost layer in Stora stenbrottet at Mt. Kinnekulle, Sweden | |
| Scientific classification | |
| Domain: | Eukaryota | 
| Kingdom: | Animalia | 
| Phylum: | Mollusca | 
| Class: | Cephalopoda | 
| Subclass: | Nautiloidea | 
| Order: | †Tarphycerida | 
| Family: | †Estonioceratidae | 
| Genus: | †Estonioceras Noetling, 1883 | 
| Species | |
| Estonioceras imperfectum (Quenstedt, 1845) | |
Estonioceras, from Estonia and Ancient Greek κέρας (kéras), meaning "horn", is an extinct genus of tarphyceridan nautiloids from the Ordovician of Europe.