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Crinoids of the Champlainian (Middle Ordovician) Guttenberg Formation—upper Mississippi Valley region

Published online by Cambridge University Press:  19 May 2016

Dennis R. Kolata*
Affiliation:
Illinois State Geological Survey, 615 East Peabody Drive, Champaign 61820

Abstract

A well-preserved and locally abundant crinoid fauna has been discovered in the lower part of the Champlainian (Middle Ordovician) Glenhaven Member of the Guttenberg Formation in the Upper Mississippi Valley region. The material consists of the dicyclic inadunates Cupulocrinus levorsoni n. sp., C. jewetti (E. Billings) and monocyclic camerate Pycnocrinus gerki n. sp.

Type
Research Article
Copyright
Copyright © The Paleontological Society 

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