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Document Type

Research

Keywords

Middle Pennsylvanian; Desmoinesian; Madera Formation; Madera County, Colorado; Marion County, Iowa; Crinoidea; Erisocrinidae; Erisocrinus knoxvillensis; Exaetocrinus maderaensis, Pontotocrinus coloradoensis; Erisocrinus typus

Abstract

Erisocrinus knoxvillensis n. sp. is described from rocks of the Desmoinesian Stage exposed near Knoxville, Marion County, Iowa. Two specimens from the Madera Formation, Desmoinesian Stage, Heurfano Park, Colorado, reported by Tischler, 1963, as belonging to the genus Erisocrinus are described as Exaetocrinus maderaensis n. sp. and Pontotocrinus coloradoensis n. sp. The lectoholotype of Erisocrinus typus Meek & Worthen, type species of the genus, is illustrated.

Publication Date

July 1975

Journal Title

Proceedings of the Iowa Academy of Science

Volume

82

Issue

2

First Page

126

Last Page

129

Copyright

© Copyright 1975 by the Iowa Academy of Science, Inc.

Language

EN

File Format

application/pdf

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