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The Early Mississippian (Osagean) ammonoid Dzhaprakoceras (Cephalopoda) from Utah

Published online by Cambridge University Press:  20 May 2016

Morris S. Petersen
Affiliation:
Department of Geology, Brigham Young University, Provo, Utah 84602
Dieter Korn
Affiliation:
Institut für Geologie and Paläontologie. Universität Tübingen. Sigwartstr. 10, D-72076, Tübingen, Germany
Jürgen Kullmann
Affiliation:
Institut für Geologie and Paläontologie. Universität Tübingen. Sigwartstr. 10, D-72076, Tübingen, Germany

Abstract

The Mississippian ammonoid genus Dzhaprakoceras Popov, 1965, well known in the eastern hemisphere, is reported from the Delle Member of the Deseret Limestone at Flux and Lakeside Mountains, Tooele County, Utah. This is the first report of the genus in western North America. The ammonoids, D. gordoni n. sp. and D. djaprakense (Librovitch, 1927) occur with mehli—Lower texanus Zone conodonts indicating a middle Osagean (earliest Viséan) age.

Type
Research Article
Copyright
Copyright © The Paleontological Society

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