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Reexamination of Yuknessia from the Cambrian of China and first report of Fuxianospira from North America

Published online by Cambridge University Press:  09 May 2016

Steven T. LoDuca ,
Mengyin Wu ,
Yuanlong Zhao ,
Shuhai Xiao ,
James D. Schiffbauer ,
Jean-Bernard Caron  and
Loren E. Babcock
Steven T. LoDuca
Affiliation:
Department of Geography and Geology, Eastern Michigan University, Ypsilanti, Michigan 48197, USA 〈sloduca@emich.edu〉
Mengyin Wu
Affiliation:
Department of Economics and Management, Guiyang University, Guiyang, Guizhou 550005, China 〈wumengyinwuhan@163.com〉
Yuanlong Zhao
Affiliation:
College of Resource and Environment Engineering, Guizhou University, Guiyang, Guizhou 550003, China 〈zhaoyuanlong@126.com〉
Shuhai Xiao
Affiliation:
Department of Geosciences, Virginia Tech, Blacksburg, Virginia 24061, USA 〈xiao@vt.edu〉
James D. Schiffbauer
Affiliation:
Department of Geological Sciences, University of Missouri, Columbia, Missouri 65211, USA 〈schiffbauerj@missouri.edu〉
Jean-Bernard Caron
Affiliation:
Department of Natural History (Palaeobiology), Royal Ontario Museum, 100 Queen’s Park, Toronto ON M5S 2C6, Canada; University of Toronto, Department of Ecology and Evolutionary Biology, 25 Willcocks Street, Toronto, Ontario M5S 3B2, Canada; University of Toronto, Department of Earth Sciences, 25 Russell Street, Toronto, Ontario M5S 3B1, Canada 〈jcaron@rom.on.ca〉
Loren E. Babcock
Affiliation:
School of Earth Sciences, The Ohio State University, Columbus, Ohio 43210, USA; Department of Geology, Sölvegatan 12, Lund University, SE-223 62, Lund, Sweden 〈babcock.5@osu.edu〉
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Abstract

Yuknessia Walcott, 1919 recently was transferred from the green algae to the Phylum Hemichordata on the basis of new details observed for the type species, Y. simplex, from the Burgess Shale Formation (Cambrian Stage 5) of British Columbia. This has prompted reexamination of material attributed to Yuknessia from various Cambrian localities in South China. Findings preclude both a Yuknessia and a hemichordate affinity for all of the Chinese study material, and most of this material is formally transferred to Fuxianospira Chen and Zhou, 1997, a taxon common in the Chengjiang biota. Comparable material from the Cambrian Marjum, Wheeler, and Burgess Shale formations of North America is also assigned to Fuxianospira, and this reassignment expands both the paleogeographic and stratigraphic range of this taxon. All aspects of the study specimens, including details obtained from scanning electron microscopy, are consistent with an algal affinity, as proposed in the original descriptions of the Chinese material.

Type
Articles
Information
Journal of Paleontology , Volume 89 , Issue 6 , November 2015 , pp. 899 - 911
Copyright
Copyright © 2016, The Paleontological Society 

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