A new brittle star (Ophiuroidea: Ophiodermatina) from the Early Triassic Paris Biota (Bear Lake County, Idaho, USA) - 06/06/19

Doi : 10.1016/j.geobios.2019.04.004

Ben Thuy ^a,^⁎ , Gilles Escarguel ^b
the Paris Biota Team^¹
The Paris Biota Team includes, in alphabetical order: Arnaud Brayard (team leader; Biogéosciences, Univ. Bourgogne Franche-Comté, Dijon, France), Kevin G. Bylund (Spanish Fork, UT, USA), Gilles Escarguel (LEHNA, Univ. Lyon 1, Lyon, France), Emmanuel Fara (Biogéosciences, Univ. Bourgogne Franche-Comté, Dijon, France), Nicolas Goudemand (IGFL, ENS-Lyon, Lyon, France), Pierre Gueriau (Synchrotron SOLEIL, Gif-sur-Yvette, France/Institute of Earth Sciences, University of Lausanne, Swiss), James F. Jenks (West Jordan, UT, USA), L.J. Krumenacker (Idaho Museum of Natural History, Idaho State Univ., Pocatello, ID, USA), Nicolas Olivier (Magmas et Volcans, Univ. Clermont Auvergne, Clermont-Ferrand, France), Daniel A. Stephen (Dpt. of Earth Sciences, Utah Valley Univ., Orem, UT, USA), Christophe Thomazo (Biogéosciences, Univ. Bourgogne Franche-Comté, Dijon, France), Mathieu Thoury (IPANEMA, Univ. Paris-Saclay/Synchrotron SOLEIL, Gif-sur-Yvette, France), and Emmanuelle Vennin (Biogéosciences, Univ. Bourgogne Franche-Comté, Dijon, France).
^a Natural History Museum Luxembourg, 25, rue Münster, 2160 Luxembourg-city, Luxembourg
^b Université de Lyon. Laboratoire d’Ecologie des Hydrosystèmes Naturels et Anthropisés, UMR 5023, Université Lyon 1, CNRS, ENTPE, 27-43 Bvd. du 11 novembre 1918, 69622 Villeurbanne cedex, France

^⁎Corresponding author.

Abstract

Knowledge on the morphology of Early Triassic ophiuroids is very limited, in spite of the relatively high number of described species. This hampers attempts to use morphology-based phylogenetic analyses in order to explore the early diversification of the ophiuroid modern clades between the latest Paleozoic and the early Mesozoic. Here, a new ophiuroid from the Early Triassic of southern Idaho (USA) is described and assigned to the new taxon Shoshonura brayardi Thuy nov. gen., nov. sp. It is part of an exceptional Early Triassic faunal assemblage recently described as the Paris Biota. On account of the arm morphology and the shape of the arm spines and arm spine articulations, Shoshonura brayardi nov. gen., nov. sp. is considered a basal member of the suborder Ophiodermatina.

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Keywords : Ophiuroids, Evolutionary history, Modern clades, Morphology, Paris Biota, Spathian

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☆	Corresponding editor: Arnaud Brayard.

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Vol 54

P. 55-61 - juin 2019 Retour au numéro

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A new brittle star (Ophiuroidea: Ophiodermatina) from the Early Triassic Paris Biota (Bear Lake County, Idaho, USA) - 06/06/19

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