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First Definite Record Of Permian Edrioasteroids: Neoisorophusella maslennikovi n. sp. from the Kungurian of northeast russia

Published online by Cambridge University Press:  14 July 2015

Colin D. Sumrall
Colin D. Sumrall*
Affiliation:
Department of Geological Sciences, University of Tennessee, Knoxville 37996, USA,
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Extract

The late history of edrioasteroids has come to light only in the last 40 yr. When the edrioasteroid chapter of the Treatise on Invertebrate Paleontology was published (Regnéll, 1966) the youngest known edrioasteroids were upper Mississippian (Chesterian). Since that time, a series of papers have described edrioasteroids in the Pennsylvanian (Fraunfelter and Utgaard, 1970; Bell, 1976; Sumrall, 1992; Sumrall and Bowsher, 1996; Sumrall et al, 2000, 2006). Pennsylvanian edrioasteroids now include nine species distributed among six genera, including one fauna bearing four genera (Sumrall et al., 2006). These edrioasteroids are not limited to a single clade but include postibullinids, plesiomorphic agelacrinitids, and derived clavate discocystinids.

Type
Paleontological Notes
Information
Journal of Paleontology , Volume 83 , Issue 6 , November 2009 , pp. 990 - 993
Copyright
Copyright © The Paleontological Society 

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