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A columnal-bearing eocrinoid from the Cambrian Burgess Shale (British Columbia, Canada)

Published online by Cambridge University Press:  28 April 2015

Colin D. Sumrall
Affiliation:
Department of Earth and Planetary Sciences, University of Tennessee, Knoxville, TN 37996, USA, 〈csumrall@utk.edu〉
Samuel Zamora
Affiliation:
Department of Paleobiology, National Museum of Natural History, Smithsonian Institution, Washington DC, 20013–7012, USA

Abstract

A new eocrinoid ?Ubaghsicystis sp. from the middle Cambrian (Series 3, Stage 5) Burgess Shale is reported based on a single known specimen. This species extends the stratigraphic range of columnal-bearing eocrinoids in Laurentia significantly from Cambrian Stage 7 (Guzhangian) to Stage 5. It increases the diversity of echinoderms in this well-known fossil-Lagerstätte, provides the oldest evidence of columnal-bearing eocrinoids from Laurentia, and further documents the cosmopolitan distribution of middle Cambrian echinoderm clades.

Type
Articles
Copyright
Copyright © 2015, The Paleontological Society 

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