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Crinoids from the Brassfield Formation of Adams County, Ohio

Published online by Cambridge University Press:  19 May 2016

William I. Ausich  and
Philip Dravage
William I. Ausich
Affiliation:
Department of Geology and Mineralogy, 125 S. Oval Mall, The Ohio State University, Columbus 43210
Philip Dravage
Affiliation:
Department of Geology, Miami University, Oxford, Ohio 45056
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Abstract

A new species of Ptychocrinus, Ptychocrinus adamsensis, and dendrocrinid, genus and species undetermined, are described from the Lower Silurian (Llandovery) Brassfield Formation of Adams County, Ohio. Unlike previously recognized Ptychocrinus species, P. adamsensis has biserial arms. Accordingly, the generic concept of Ptychocrinus is broadened. Ptychocrinus adamsensis is the youngest North American species of Ptychocrinus. Ptychocrinus is not known from the Brassfield fauna that has been previously described from the Greene–Montgomery County area of Ohio.

Type
Research Article
Information
Journal of Paleontology , Volume 62 , Issue 2 , March 1988 , pp. 285 - 289
Copyright
Copyright © The Paleontological Society 

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