The first record of the lamniform shark genus, Johnlongia, from the Niobrara Chalk (Upper Cretaceous), western Kansas

Kenshu Shimada; Keith Ewell; Michael J. Everhart

doi:10.1660/0022-8443(2004)107[0131:TFROTL]2.0.CO;2

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Kenshu Shimada,^1,2 Keith Ewell,³ Michael J. Everhart²

¹Environmental Science Program and Department of Biological Sciences, DePaul University, 2325 North Clifton Avenue, Chicago, Illinois 60614 ( ) kshimada@depaul.edu
²Sternberg Museum of Natural History, Fort Hays State University, Hays, Kansas 67601 ( ) meverhar@fhsu.edu
³1385 Highway, 145 South, Harrisburg, Illinois 62946

Abstract

We describe the first occurrence of the Late Cretaceous lamniform shark, Johnlongia sp. (Elasmobranchii: Odontaspididae), from the Smoky Hill Chalk Member of the Niobrara Chalk in Trego County, Kansas. The specimen, a small isolated tooth, is morphologically unique and may represent a new taxon within the genus. The tooth is from the Upper Coniacian portion of the Smoky Hill Chalk, and represents the stratigraphically youngest Johnlongia specimen in the world. The addition of Johnlongia sp. increases the total number of lamniform species reported from the Smoky Hill Chalk to eight.

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Kenshu Shimada, Keith Ewell, and Michael J. Everhart "The first record of the lamniform shark genus, Johnlongia, from the Niobrara Chalk (Upper Cretaceous), western Kansas," Transactions of the Kansas Academy of Science 107(3), 131-135, (1 October 2004). https://doi.org/10.1660/0022-8443(2004)107[0131:TFROTL]2.0.CO;2

Published: 1 October 2004

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Coniacian

Elasmobranchii

Lamniformes

Odontaspididae

Paleoecology

Smoky Hill Chalk

tooth

Western Interior Sea

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