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Encrinurine trilobites from the Silurian Brownsport Formation of Tennessee

Published online by Cambridge University Press:  14 July 2015

Gregory D. Edgecombe
Gregory D. Edgecombe*
Affiliation:
Department of Geological Sciences, Columbia University Department of Invertebrates, American Museum of Natural History, Central Park West at 79th Street, New York, New York 10024
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Abstract

Encrinurinae from the Ludlovian Brownsport Formation in west central Tennessee include Balizoma ramskoeldi n. sp., Fragiscutum glebale Campbell, 1967, and Mackenziurus sp. Balizoma ramskoeldi is most similar to Ludlovian species in England and Gotland. The discovery of F. glebale in Tennessee extends the geographic range of this species, known also from the correlative Henryhouse Formation in Oklahoma. Fragiscutum is an eastern/southern Laurentian endemic; Balizoma is of Wenlockian–Přidolían range, with its most widespread Euramerican distribution in the Ludlow. The stratigraphic range of Mackenziurus is extended into the Ludlow.

Type
Research Article
Information
Journal of Paleontology , Volume 64 , Issue 6 , November 1990 , pp. 961 - 967
Copyright
Copyright © The Journal of Paleontology 

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