主题：【已应助】求助5篇英文文献，谢谢各位！谢谢

【序号】：1
【作者】：Jean-Bernard Caron,  Simon Conway Morris  & Christopher B. Cameron
【题名】：Tubicolous enteropneusts from the Cambrian period
【期刊】：Nature
【年、卷、期、起止页码】： (2013) doi:10.1038/nature12017
【全文链接】：http://www.nature.com/nature/journal/vaop/ncurrent/full/nature12017.html

【序号】：2
【作者】：SAMUEL ZAMORA
【题名】：Morphology and phylogenetic interpretation of a new Cambrian edrioasteroid (Echinodermata) from Spain
【期刊】：Palaeontology
【年、卷、期、起止页码】：Volume 56, Issue 2, pages 421–431, March 2013
【全文链接】：http://onlinelibrary.wiley.com/doi/10.1111/j.1475-4983.2012.01209.x/abstract

【序号】：3
【作者】：Lidya G. Tarhan1,*, Nigel C. Hughes1, Paul M. Myrow2, Om N. Bhargava3, Arun D. Ahluwalia4, Anatoliy B. Kudryavtsev5
【题名】：Precambrian–Cambrian boundary interval occurrence and form of the enigmatic tubular body fossil Shaanxilithes ningqiangensis from the Lesser Himalaya of India
【期刊】：Palaeontology
【年、卷、期、起止页码】：Article first published online: 22 JUL 2013 DOI: 10.1111/pala.12066
【全文链接】：http://onlinelibrary.wiley.com/doi/10.1111/pala.12066/abstract

【序号】：4
【作者】：Qing Liu
【题名】：The First Discovery of Marrella (Arthropoda, Marrellomorpha) from the Balang Formation (Cambrian Series 2) in Hunan, China
【期刊】：Journal of Paleontology
【年、卷、期、起止页码】： 87(3):391-394. 2013
【全文链接】：http://www.bioone.org/doi/abs/10.1666/12-118.1

【序号】：5
【作者】：David M. Rudkin 1, Michael B. Cuggy 2, Graham A. Young 3, and Deborah P. Thompson 3
【题名】：An Ordovician Pycnogonid (Sea Spider) with Serially Subdivided ‘Head' Region
【期刊】：Journal of Paleontology
【年、卷、期、起止页码】： 87(3):395-405. 2013
【全文链接】：http://www.bioone.org/doi/abs/10.1666/12-057.1

万分感谢