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Cindarella and the arachnate clade Xandarellida (Arthropoda, Early Cambrian) from China

Published online by Cambridge University Press:  03 November 2011

Lars Ramsköld ,
Chen Junyuan ,
Gregory D. Edgecombe  and
Zhou Guiqing
Lars Ramsköld
Affiliation:
Museum of Palaeontology, University of Uppsala, Norbyvägen 22, S-752 36, Uppsala, Sweden
Chen Junyuan
Affiliation:
Nanjing Institute of Geology and Palaeontology, Academia Sinica, Chi-Ming-Ssu, Nanjing 210008, People's Republic of China
Gregory D. Edgecombe
Affiliation:
Australian Museum, 6 College Street, Sydney South, NSW 2000, Australia
Zhou Guiqing
Affiliation:
Nanjing Institute of Geology and Palaeontology, Academia Sinica, Chi-Ming-Ssu, Nanjing 210008, People's Republic of China
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Abstract

Cindarella eucalla Chen et al. from the Early Cambrian Chengjiang fauna is the closest relative of Xandarella spectaculum Hou et al. Cindarella and Xandarella are united as Xandarellida, a further component of Cambrian arachnate diversity. Diagnostic of Xandarellida are ventral eyes, a posterior extension of the head shield that covers anterior trunk segments, and multiple somites per tergite in the rear part of the trunk. Somites and tergites are decoupled throughout the trunk in Cindarella. The bilobate structure of the exopod in xandarellids is widespread throughout the Arachnata.

Keywords

ArachnataEarly CambrianXandarellidaChengjiang fauna
Type
Research Article
Information
Earth and Environmental Science Transactions of The Royal Society of Edinburgh , Volume 88 , Issue 1 , 1997 , pp. 19 - 38
Copyright
Copyright © Royal Society of Edinburgh 1997

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