Eotripteroceras
Eotripteroceras Temporal range: M Ordovician | |
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Scientific classification | |
Kingdom: | Animalia |
Phylum: | Mollusca |
Class: | Cephalopoda |
Subclass: | Nautiloidea |
Order: | Orthocerida |
Superfamily: | Orthocerataceae |
Family: | Orthoceratidae |
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
- Sweet, Walter C. 1964. Nautiloidea-Orthocerida. Treatise on Invertebrate Paleontology, Part K. Geological Soc of America, and Univ Kansas Press.
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