Pleurorthoceras

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Pleurorthoceras
Temporal range: U Ordovician
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Pleurorthoceras

Flower, 1962

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.

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