Discovery and significance of Naraoia from the Qiandongian (lower Cambrian) Balang Formation, Eastern Guizhou, South China


Authors: Peng J, Zhao YL, Sun HJ

Published in: Bulletin of Geosciences, volume 87, issue 1; pages: 143 - 150; Received 12 September 2010; Accepted in revised form March form 23; Online 10 February 2012

Keywords: Naraoia, Balang Formation, Qiandongian (lower Cambrian), Geyi, Taijiang, China,

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Naraoia is a taxon represented by commonly non-mineralized fossil found in lower–middle Cambrian strata and widely distributed in China, North America, and is an important component of Burgess Shale-type biotas. Well-preserved representatives of Naraoia are known from the Chengjiang and Kaili biotas of South China. Here, we report a new species of Naraoia, Naraoia taijiangensis sp. nov. from the Balang Fauna, Guizhou, South China. The new species clearly represents an intermediate morphology between Misszhouia longicadata and N. cf. N. compacta. It is obvious that there is a body-morphologic evolution for Naraoia from the Cambrian Series 2 to Cambrian Series 3 (lower Cambrian to the middle Cambrian). N. taijiangensis sp. nov. provides new data about evolution and geographical range of this genus.


Blaker, M.R. & Peel, J.S. 1997. Lower Cambrian trilobites from North Greenland. Meddelelser om Gronland Geosciences 35, 1-145.

Briggs, D.E G., Erwin, D.H. & Collier, F.J. 1994. The fossils of the Burgess Shale. 236 pp. Smithsonian Institution Press, Washington.

Caron, J.B., Rudkin, D.M. & Millken, S. 2004. A new late Silurian (Pridolian) naraoiid (Euarthropoda: Nektaspida) from the Bertie formation of southern Ontario, Canada - delayed fallout from the Cambrian explosion. Journal of Paleontology 78(6), 1136-1145.View article

Conway Morris, S. 1979. The Burgess Shale (Middle Cambrian) fauna. Annual Reviews of Ecology and Systematics 10, 327-349. View article

Chen, J.Y., Edgecombe, G.D.&Ramsköld, L. 1997. Morphological and ecological disparity in naraoiids (Arthropoda) from the early Cambrian Chengjiang fauna, China. Records of Australia Museum 49, 1-24. View article

Hou, X.G., Bergström, J.,Wang, H.F., Feng, X.H.&Chen, A.L. 1999. The Chengjiang Fauna: Exceptionally well-preserved animals from 530 million years ago. 170 pp. Yunnan Science and Technology Press, Kunming. [in Chinese with English summary]

Hu, S.X., Li, Y., Luo, H.L., Fu, X.P., You, T., Pang, J.Y., Liu, Q. & Steiner, M. 2008. New record of palaeoscolecids from the Early Cambrian of Yunnan, China. Acta Geologica Sinica 82(2), 244-248.

Lin, J.P. 2006. Taphonomy of Naraoiids (Arthropoda) from the Middle Cambrian Kaili Biota, Guizhou Province, South China. Palaios 21, 15-25. View article

Luo, H.L., Li, Y., Hu, S.X., Fu, X.P., Hou, S.G., Liu, X.Y., Chen, L.Z., Li, F.J., Pang, J.Y. & Liu, Q. 2008. Early Cambrian Malong Fauna and Guanshan Fauna from Eastern Yunnan, China. 134 pp. Yunnan Science and Technology Press, Kunming. [in Chinese with English summary]

Nedin, C. 1995. The Emu Bay Shale, a Lower Cambrian fossil Lagerstätten, Kangaroo Island, South Australia. Australasian Association of Palaeontologists Memoir 18, 31-40.

Nedin, C. 1999. Anomalocaris predation on nonmineralized and mineralized trilobites. Geology 27, 987-990. View article

Öpik, A.A. 1970. Redlichia of the Ordian (Cambrian of northern Australia and New South Wales). Bulletin of Bureau of Mineral Resources, Geology and Geophysics 114, 1-66.

Patterson, J.H., Edgecombe, G.D., García-Bellido, D.C., Jago, J.B. & Gehling, J.G. 2010. Nektaspid arthropods from the Lower Cambrian Emu Bay Shale Lagerstätte, south Australia, with a reassessment of lamellipedian relationships. Palaeontology 53(2), 377-402. View article

Peng, J. 2009. The Qiandongian (Cambrian) Balang Fauna from Eastern Guizhou, South China. 137 pp. Master thesis, Nanjing University.

Peng, S.C. & Babcock, E.L. 2001. Cambrian of the Hunan-Guizhou region, South China, 3-51. In Peng, S.C., Babcock, E.L. & Zhu, M. (eds) Cambrian System of South China. Palaeoworld 13.

Peng, J., Feng, H.Z., Zhao, Y.L., Fu, X.P. & Wang, Y.X. 2007. Tuzoia from the Lower Cambrian Balang Formation, eastern Guizhou, China. Geological Review 53(3), 397-403.

Peng, J., Feng, H.Z., Zhao, Y.L., Fu, X.P. & Yao, L. 2010b. New bradoriid arthropods from the Early Cambrian Balang Formation of eastern Guizhou, South China. Acta Geologica Sinica 84(1), 56-68. View article

Peng, J., Zhao, Y.L., Qin, Q., Yan, X. & Ma, H.T. 2010a. New data on brachiopods from the Qiandongian (Lower Cambrian) Balang Formation, eastern Guizhou, South China. Acta Palaeontologica Sinica 49(3), 365-379. [in Chinese with English summary]

Peng, J., Zhao, Y.L., Wu, Y., Yuan, J. & Tai, T. 2005. The Balang Fauna - a new early Cambrian Fauna from Kaili City, Guizhou Province. Chinese Science Bulletin 50(11), 1159-1162. View article

Peng, J., Zhao, Y.L. & Yang, X.L. 2006. Trilobites of the upper part of Lower Cambrian Balang Formation, southeastern Guizhou Province, China. Acta Palaeontologica Sinica 45(2), 235-242. [in Chinese with English summary]

Qin, Q., Peng, J., Fu, X.P. & Da, Y. 2010. Restudy of Changaspis (Lee), 1961 from Qiandongian (Early Cambrian) Balang Formation near eastern Guizhou, south China. Acta Palaeontologica Sinica 49(2), 220-230. [in Chinese with English summary]

Raymond, P.E. 1920. The appendage, anatomy, and relationships of trilobites. Memoirs of the Connecticut Academy of Arts and Sciences 7, 1-169.

Robison, R.A. 1984. New occurrences of the unusual trilobite Naraoia from the Cambrian of Idaho and Utah. The University of Kansas Paleontological Contributions 112, 1-8.

Simonetta, A.M. & Delle Cave, L. 1975. The Cambrian non-trilobite arthropods from the Burgess Shale of British Columbia. A study of their comparative morphology, taxonomy and evolutionary significance. Palaeontographica Italica 69, 1-37.

Steiner, M., Zhu, M.Y., Zhao, Y.L. & Erdtmann, B.-D. 2005. Lower Cambrian Burgess Shale-type fossil associations of South China. Palaeogeography, Palaeoclimatology, Palaeoecology 220, 129-152. View article

Walcott, C.D. 1912. Middle Cambrian Branchiopoda, Malacostraca, Trilobita and Merostomata. Cambrian geology and paleontology II. Smithsonian Miscellaneous Collections 57, 145-228.

Walcott, C.D. 1931. Addenda to description of Burgess Shale fossils. Smithsonian Miscellaneous Collections 85, 1-46.

Whittington, H.B. 1977. The Middle Cambrian trilobite Naraoia, Burgess Shale, British Columbia. Philosophical Transactions of the Royal Society of London, Series B 280(974), 409-443. View article

Yin, G.Z. 1987. Cambrian, 49-96. In Bureau of Guizhou Geology and Mineral Resources (ed.) Regional Geology of Guizhou Province. Geological Memories series 1(7). PRC Ministry of Geology and Mineral Resources, Geological Publishing Press, Beijing. [in Chinese with English summary]

Yin, G.Z. 1996. Division and correlation of Cambrian in Guizhou. Guizhou Geology 13(2), 115-128. [in Chinese with English abstract]

Yuan, J.L., Zhao, Y.L. & Li, Y. 2001. Biostratigraphy of oryctocephalid trilobites. Acta Palaeontologica Sinica 40 (Supplement), 143-156.

Yuan, J.L., Zhao, Y.L.&Yang, X. 2006. Speciation of the genus Arthricocephalus Bergeron, 1899 (Trilobita) from the late Early Cambrian and its stratigraphic significance. Progress in Natural Science 16(6), 614-623. View article

Zhang, W.T. & Hou, X.G. 1985. Preliminary notes on the occurrence of the unusual trilobite Naraoia in Asia. Acta Palaeontologica Sinica 24, 591-595. [in Chinese with English abstract]

Zhang, X.L., Shu, D.G. & Erwin, D.H. 2007. Cambrian naraoiids (Arthropoda), morphology, ontogeny, systematics, and evolutionary relationships. Journal of Paleontology 81, 1-52. View article

Zhou, Z.Y., Yuan, J.L., Zhang, Z.H., Wu, X.R. & Yin, G.Z. 1979. The Cambrian bio-geographical realm divided in Guizhou Province, South China and adjacent to region. Journal of Stratigraphy 3(4), 258-271. [in Chinese]

Zhou, Z.Y., Yuan, J.L., Zhang, Z.H., Wu, X.R. & Yin, G.Z. 1980. System and correlation of Cambrian stratigraphies in Guizhou, China. Journal of Stratigraphy 4(4), 273-281. [in Chinese]

Zhao, Y.L., Parsley, R.L. & Peng, J. 2007. Early Cambrian eocrinoids from Guizhou Province, South China. Palaeogeography, Palaeoclimatology, Palaeoecology 254, 317-327. View article

Zhao, Y.L., Yuan, J.L., Zhu, M.Y., Yang, R.D., Guo, Q.J., Peng, J. & Yang, X.L. 2002. Progress and significance in research on the early Middle Cambrian Kaili Biota, Guizhou Province, China. Progress in Natural Science 12(9), 649-654.

Zhao, Y.L., Yuan, J.L., Zhu, M.Y., Yang, R.D., Guo, Q.J., Qian, Y., Huang, Y.Z. & Pan, Y. 1999. A progress report on research on the early Middle Cambrian Kaili Biota, Guizhou, PRC. Acta Palaeontologica Sinica 38 (Supplement), 1-14. [in Chinese with English abstract]

Zhao, Y.L., Zhu, M.Y., Babcock, L.E., Yuan, J.L., Parsley, R.L., Peng, J., Yang, X.L. & Wang, Y. 2005. Kaili Biota: A taphonomic window on diversification of metazoans from the basal Middle Cambrian, Guizhou, China. Acta Geologica Sinica 79(6), 751-765. View article