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The systematics of postibullinid edrioasteroids

Published online by Cambridge University Press:  14 July 2015

Colin D. Sumrall ,
Jon Garbisch  and
John Paul Pope
Colin D. Sumrall
Affiliation:
Frederick and Amey Geier Collections and Research Center, Cincinnati Museum Center, 1720 Gilbert Avenue, Cincinnati, OH 45202
Jon Garbisch
Affiliation:
UGA Marine Institute, Sapelo Island, GA 31327
John Paul Pope
Affiliation:
Geology Department, 121 Trowbridge Hall, University of Iowa, Iowa City, 52242
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Abstract

An examination of Devonian through Pennsylvanian postibullinid edrioasteroids indicates the presence of two clades in the monophyletic subfamily Postibullinae, new subfamily. Postibulla is characterized by the presence of a posterior oral protuberance and a cover plate pattern with three primary plates and includes Postibulla legrandensis, P. lukei, P. keslingi, P. neglecta, and P. alabamaensis new species. Parapostibulla new genus is characterized by double biserial cover plates, the lack of the posterior oral protuberance, and an unusual hydro-gonopore, and includes Parapostibulla hybolopus (Fraunfelter and Utgaard, 1970), P. murphyi new species and Parapostibulla species A. Additional poorly-preserved edrioasteroids are illustrated from the Missourian and Virgilian of Kansas and Iowa that are the youngest known from North America.

Type
Research Article
Information
Journal of Paleontology , Volume 74 , Issue 1 , January 2000 , pp. 72 - 83
Copyright
Copyright © The Paleontological Society 2000

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