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Jujuyaspis borealis and associated trilobites and conodonts from the Lower Ordovician of Texas and Utah

Published online by Cambridge University Press:  14 July 2015

James H. Stitt  and
James F. Miller
James H. Stitt
Affiliation:
Department of Geology, University of Missouri–Columbia, Columbia 65211
James F. Miller
Affiliation:
Department of Geosciences, Southwest Missouri State University, Springfield 65804-0089
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Abstract

Jujuyaspis borealis is reported from earliest Ordovician (North American usage) limestones in central Texas and western Utah, the first time this species has been recognized in the United States. Jujuyaspis is a widespread olenid trilobite that occurs near the base of the Tremadoc Series in a variety of lithologies in North and South America, Europe, and Asia. When international agreement is reached on the exact horizon at or near the base of the Tremadoc Series that is to be used as the Cambrian–Ordovician boundary, Jujuyaspis will likely prove to be a very useful taxon for recognition of the boundary interval.

Type
Research Article
Information
Journal of Paleontology , Volume 61 , Issue 1 , January 1987 , pp. 112 - 121
Copyright
Copyright © The Paleontological Society 

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