Pleurorthoceras is an orthocerid cephalopod from the Upper Ordovician of North America (Ohio, Manit). The shell externally is like that of Michelinoceras in being long and slender with a circular cross section. It differs in having a subcentral siphuncle with somewhat inflated segments.
| Pleurorthoceras Temporal range: U Ordovician
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| Genus: | Pleurorthoceras Flower, 1962
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References
edit- Sweet, Walter C. 1964. Nautiloidea-Orthocerida. Treatise on Invertebrate Paleontology, Part K. Geological Soc of America and Univ Kansas Press.