A Parvancorina -like arthropod from the Cambrian of South China

Authors: Lin, Jih-Pai¹; Gon, Samuel M.²; Gehling, James G.³; Babcock, Loren E.¹; Zhao, Yuan-Long⁴; Zhang, Xing-Liang⁵; Hu, Shi-Xue⁶; Yuan, Jin-Liang⁷; Yu, Mei-Yi⁴; Peng, Jin⁴

Source: Historical Biology: A Journal of Paleobiology, Volume 18, Number 1, March 2006 , pp. 33-45(13)

Publisher: Taylor and Francis Ltd

Buy & download fulltext article:

Price: $56.94 plus tax (Refund Policy)

Abstract:

Constraining the origin of animal groups is allowed, to some extent, by discoveries of Cambrian Lagerstätten that preserve both mineralizing and nonmineralizing organisms. A new species is reported here of the Cambrian arthropod Skania , which bears an exoskeleton that shares homologies with the Neoproterozoic (Ediacaran) organism Parvancorina and firmly establishes a Precambrian root for arthropods. A new monophyletic group, Parvancorinomorpha, is proposed as the first clade within the arthropod crown group demonstrably ranging across the Neoproterozoic–Paleozoic transition. The Parvancorinomorpha is interpreted to be the sister group of the Arachnomorpha. Incipient cephalization in Skania and related genera represents a step in the progression toward division of a cephalon from a large posterior trunk as shown in Cambrian arachnomorphs such as naraoiids and the addition of a pygidium and thoracic tergites as shown in the arachnomorph clade basal to trilobites. This evidence can serve as a new calibration point for estimating the divergence time for the last common ancestor of arthropods and priapulids based on molecular clock methods.

Keywords: Vendobionts; Ediacaran; Primicaris; Skania; Kaili Formation; Burgess Shale-type deposits

Document Type: Research article

DOI: http://dx.doi.org/10.1080/08912960500508689

Affiliations: 1: The Ohio State University, Department of Geological Sciences, Columbus, OH, 43210, USA 2: The Nature Conservancy of Hawaii, 923 Nuuanu Avenue, Honolulu, HI, 96817, USA 3: South Australian Museum, Palaeontology Division of Natural Science, North Terrace, Adelaide, SA, 5000, Australia 4: College of Resources and Environment Science, Guizhou University, Guiyang, 550003, Guizhou Province, China 5: Northwest University, Department of Geology, Xian, 710069, China 6: Yunnan Institute of Geological Science, 131 Baita Road, Kunming, 650051, Yunnan Province, China 7: Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, 39 East Beijing Road, Nanjing, 210008, China

Publication date: 2006-03-01

More about this publication?

Information for Authors
Subscribe to this Title
ingentaconnect is not responsible for the content or availability of external websites

A Parvancorina -like arthropod from the Cambrian of South China

Buy & download fulltext article:

Tools

Key

Text size:

Useful pages