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A revised interpretation of the Pennsylvanian flexible crinoid Zenocrinus zeus (Echinodermata)

Published online by Cambridge University Press:  27 June 2016

Mark E. Peter
Mark E. Peter*
Affiliation:
School of Earth Sciences, 125 South Oval Mall, The Ohio State University, Columbus, Ohio 43210 〈[email protected]〉
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Abstract

Moore and Strimple described the Morrowan (Lower Pennsylvanian, Bashkirian) crinoid Zenocrinus zeus, and noted significant differences in the number and arrangement of plates in the posterior interray between the holotype and the paratype, the only known specimens. A reexamination of the type specimens allowed for a reconciliation of these discrepancies. The new interpretation of Z. zeus necessitates a revision of the diagnosis, and a new plate diagram is proposed. Additional morphological features of the species are described, including the presence of a generating columnal between the column proxistele and mesistele, and a ratcheting profile for the exterior surfaces of calyx ray plates.

Type
Articles
Information
Journal of Paleontology , Volume 90 , Issue 3 , May 2016 , pp. 499 - 505
Copyright
Copyright © 2016, The Paleontological Society 

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