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New taxa and revised stratigraphic distribution of the crinoid fauna from Anticosti Island, Québec, Canada (Late Ordovician-early Silurian)

Published online by Cambridge University Press:  31 May 2019

William I. Ausich  and
Mario E. Cournoyer
William I. Ausich
Affiliation:
School of Earth Sciences, 155 South Oval Mall, The Ohio State University, Columbus, OH 43210 USA 〈[email protected]〉
Mario E. Cournoyer
Affiliation:
Musée de paléontologie et de l'évolution, 541 Congrégation Street, Montréal, Québec Canada H3K 2J1 〈[email protected]〉
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Abstract

End-Ordovician extinctions had a profound effect on shallow-water benthic communities, including the Crinoidea. Further, recovery after the extinctions resulted in a macroevolutionary turnover in crinoid faunas. Anticosti Island is the most complete Ordovician-Silurian boundary section recording shallow-water habitats. Both new taxa and changes in Anticosti Island stratigraphic nomenclature are addressed herein. New taxa include Becsciecrinus groulxi n. sp., Bucucrinus isotaloi n. sp., Jovacrinus clarki n. sp., Plicodendrocrinus petryki n. sp., Plicodendrocrinus martini n. sp., Thalamocrinus daoustae n. sp., and Lateranicrinus saintlaurenti n. gen. n. sp. The status of Xenocrinus rubus as a boundary-crossing taxon is confirmed, range extensions of several taxa are documented, and the distribution of crinoids with the revised stratigraphic nomenclature is documented.

UUID: http://zoobank.org/19613a44-ec69-47d7-88ab-fcf88ba771f0.

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Articles
Information
Journal of Paleontology , Volume 93 , Issue 6 , November 2019 , pp. 1137 - 1158
Copyright
Copyright © 2019, The Paleontological Society 

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