Eotripteroceras
| Eotripteroceras Temporal range: M Ordovician
| |
|---|---|
| Scientific classification | |
| Kingdom: | |
| Phylum: | |
| Class: | |
| Subclass: | |
| Order: | |
| Superfamily: | |
| Family: | |
| Subfamily: | Michelinoceratinae
|
| Genus: | Eotripteroceras Flower, 1943
|
Eotripteroceras is a smooth-shelled michelinocerin 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.
References
[edit]- Sweet, Walter C. 1964. Nautiloidea-Orthocerida. Treatise on Invertebrate Paleontology, Part K. Geological Soc of America, and Univ Kansas Press.