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Spiracarneyella, a new carneyellid edrioasteroid from the Upper Ordovician (Katian) of Kentucky and Ohio and comments on carneyellid heterochrony

Published online by Cambridge University Press:  03 December 2020

Colin D. Sumrall Open the ORCID record for Colin D. Sumrall [Opens in a new window]  and
Daniel Phelps
Colin D. Sumrall
Affiliation:
Department of Earth and Planetary Sciences, The University of Tennessee, Knoxville, TN37996-1526, USA,
Daniel Phelps
Affiliation:
Kentucky Paleontological Society, 2004 Sawyer Court, Lexington Kentucky40514
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Abstract

A new genus and species of carneyellid edrioasteroid, Spiracarneyella florencei n. gen. n. sp., is described from the Upper Ordovician (Kaitian) Point Pleasant Formation of northern Kentucky and southern Ohio. Spiracarneyella n. gen. is characterized by having all five ambulacra curving clockwise around the theca, having small node-bearing interambulacral plates in the distal interambulacra, and having the periproct placement slightly offset to the right side of the CD interambulacrum. The oral area of carneyellids evolved by paedomorphosis of the oral plates covering the mouth. The straight ambulacra of Cryptogoleus and the spiraling ambulacra of Spiracarneyella n. gen. evolved by paedomorphosis and peramorphosis, respectively.

UUID: http://zoobank.org/79733c8f-0bc8-4e7e-8f77-8508f576755c

Type
Articles
Information
Journal of Paleontology , Volume 95 , Issue 3 , May 2021 , pp. 624 - 629
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Copyright
Copyright © The Author(s), 2020. Published by Cambridge University Press on behalf of The Paleontological Society

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