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Pirumaspis lancasteri

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Journal Article
Published: 01 January 2000
Journal of Paleontology (2000) 74 (1): 123–132.
... in lacking cornual plates and possessing long posteriorly opening branchial plates, it is considerably larger and broader, as the dorsal shield of T. elyensis is relatively narrow, and only 75 mm long. The other Emsian species, Pirumaspis lancasteri, has a quite different gross morphology in which...
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Journal Article
Published: 01 July 2020
Journal of Paleontology (2020) 94 (4): 758–772.
... additional information towards solving why the denticles formed. Tuberculate pteraspids are otherwise only known from the Early and Middle Devonian of the western United States. Tuberculaspis elyensis Ilyes and Elliott, 1994 and Pirumaspis lancasteri Ilyes and Elliott, 1994 occur in the Early...
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