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

被引:3
|
作者
Zamora, Samuel [1 ,2 ]
Sumrall, Colin D. [3 ]
Sprinkle, James [4 ]
机构
[1] Smithsonian Inst, Natl Museum Nat Hist, Dept Paleobiol, Washington, DC 20013 USA
[2] Inst Geol & Minero Espana, Zaragoza 50006, Spain
[3] Univ Tennessee, Dept Earth & Planetary Sci, Knoxville, TN 37996 USA
[4] Univ Texas Austin, Jackson Sch Geosci, Dept Geol Sci, Austin, TX 78712 USA
关键词
CAMBRIAN ECHINODERMS;
D O I
10.1017/jpa.2014.16
中图分类号
Q91 [古生物学];
学科分类号
0709 ; 070903 ;
摘要
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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页码:189 / 193
页数:5
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