Eotripteroceras
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| Eotripteroceras Temporal range: M Ordovician | |
|---|---|
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Order: | †Orthocerida |
| Family: | †Orthoceratidae |
| Genus: | †Eotripteroceras Flower, 1943 |
Eotripteroceras is a smooth-shelled orthocerid from the middle Ordovician of the state of New York.
The shell of Eotripteroceras is a depressed orthocone with the underside (the venter) flatter than the upper (the dorsum). The siphuncle is below the center -as viewed in horizontal orientation- and is cylindrical in form. Both siphuncle and chambers are empty.