Tajaroceras
| Tajaroceras Temporal range: LOrdovician (Cassinian)
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| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Order: | †Dissidocerida |
| Family: | †Troedssonellidae |
| Genus: | †Tajaroceras Hook and Flower (1976) |
Tajaroceras is an extinct slender cephalopod from the uppermost Lower Ordovician of western North America, belonging to the Orthocerid family Troedssonellidae.