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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Pleurorthoceras

Flower, 1962

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