New long-stemmed eocrinoid from the Furongian Point Peak Shale Member of the Wilberns Formation, central Texas

Samuel Zamora; Colin D. Sumrall; James Sprinkle

doi:10.1017/jpa.2014.16

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Samuel Zamora,^1,2 Colin D. Sumrall,³ James Sprinkle⁴

¹Department of Paleobiology, National Museum of Natural History, Smithsonian Institution, Washington DC, 20013-7012, USA,
²Instituto Geológico y Minero de España, C/Manuel Lasala, 44, 9°B, 50006, Zaragoza, Spain < > samuel@unizar.es
³Department of Earth and Planetary Sciences, University of Tennessee, Knoxville, TN 37996, USA; < > csumrall@utk.edu
⁴Department of Geological Sciences, Jackson School of Geosciences, University of Texas, Austin TX, 78712-0254, USA; < > echino@jsg.utexas.edu

Abstract

Llanocystis wilbernsensis n. gen. n. sp. (Eocrinoidea, Echinodermata) is described based on three specimens from the Furongian Point Peak Shale Member of the Wilberns Formation in central Texas. It displays a unique morphology including a very long stem constructed with holomeric columnals, few feeding appendages, and a polyplated theca. The specimens occur in an intraformational conglomerate deposited in a proximal carbonate platform environment and represent an example of the poorly documented “pelmatozoan” radiation that occurred in proximal facies by the end of the Cambrian.

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Samuel Zamora, Colin D. Sumrall, and James Sprinkle "New long-stemmed eocrinoid from the Furongian Point Peak Shale Member of the Wilberns Formation, central Texas," Journal of Paleontology 89(1), 189-193, (1 January 2015). https://doi.org/10.1017/jpa.2014.16

Accepted: 1 May 2014; Published: 1 January 2015

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