Ptychodus mammillaris (Elasmobranchii) and Enchodus cf. E. shumardi (Teleostei) from the Fort Hays Limestone Member of the Niobrara Chalk (Upper Cretaceous) in Ellis County, Kansas

Kenshu Shimada; Michael J. Everhart

doi:10.1660/0022-8443(2003)106[0171:PMEAEC]2.0.CO;2

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Kenshu Shimada,^1,2 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

Abstract

Vertebrate fossils are rare components of the Fort Hays Limestone Member (uppermost Turonian - Lower Coniacian) of the Upper Cretaceous Niobrara Chalk. Herein, two fish taxa are described that are new to the unit: Ptychodus mammillaris Agassiz and Enchodus cf. E. shumardi Leidy. These additions increase the total number of documented vertebrate species to 11 for the Fort Hays Limestone and provide additional insights into the paleoecology (e.g. community structure) of the Western Interior Seaway during the deposition of the Fort Hays Limestone.

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Kenshu Shimada and Michael J. Everhart "Ptychodus mammillaris (Elasmobranchii) and Enchodus cf. E. shumardi (Teleostei) from the Fort Hays Limestone Member of the Niobrara Chalk (Upper Cretaceous) in Ellis County, Kansas," Transactions of the Kansas Academy of Science 106(3), 171-176, (1 October 2003). https://doi.org/10.1660/0022-8443(2003)106[0171:PMEAEC]2.0.CO;2

Published: 1 October 2003

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