The Extinct Shark Genus Cretodus (Lamniformes: Pseudoscapanorhynchidae) from the Uppermost Part of the Upper Cretaceous Fairport Chalk in Kansas, USA, and Its Stratigraphic and Ecological Significance

Antonio G. Armagno; Kenshu Shimada

doi:10.1660/062.127.0301

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25 November 2024 The Extinct Shark Genus Cretodus (Lamniformes: Pseudoscapanorhynchidae) from the Uppermost Part of the Upper Cretaceous Fairport Chalk in Kansas, USA, and Its Stratigraphic and Ecological Significance

Antonio G. Armagno, Kenshu Shimada

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Transactions of the Kansas Academy of Science, 127(3-4):95-100 (2024). https://doi.org/10.1660/062.127.0301

Abstract

Cretodus is an extinct lamniform shark genus that is known from the Albian–Santonian marine deposits nearly worldwide with three recognized categories: the longiplicatus/emiplicatus-grade, the gigantea/houghtonorum-grade, and the crassidens-grade Cretodus. FHSM VP-19857 is a Cretodus tooth housed in the Sternberg Museum of Natural History in Kansas, USA. It occurred from the upper part of the Fairport Chalk Member (mid-Middle Turonian) of the Carlile Shale in Hamilton County, Kansas. This specimen is significant because it represents the geologically latest occurrence of the longiplicatus/semiplicatus-grade Cretodus in Kansas and further supports the hypothesis that Cretodus (at least members of the longiplicatus/semiplicatus- and gigantea/houghtonorum-grades) preferred nearshore environments.

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Antonio G. Armagno and Kenshu Shimada "The Extinct Shark Genus Cretodus (Lamniformes: Pseudoscapanorhynchidae) from the Uppermost Part of the Upper Cretaceous Fairport Chalk in Kansas, USA, and Its Stratigraphic and Ecological Significance," Transactions of the Kansas Academy of Science 127(3-4), 95-100, (25 November 2024). https://doi.org/10.1660/062.127.0301

Published: 25 November 2024

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