A new oryctocephalid trilobite from the Balang Formation (Cambrian Stage 4) of northwestern Hunan,South China,with remarks on the classification of oryctocephalids |
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| Authors: | Shan-Chi Peng Loren E Babcock Xue-Jian Zhu Tao Dai |
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| Institution: | 1. State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, 39 East Beijing Road, Nanjing 210008, China;2. School of Earth Sciences, The Ohio State University, 125 South Oval Mall, Columbus, OH 43210, USA;3. State Key Laboratory for Continental Dynamics, Department of Geology, Northwest University, Xi’an 710069, China |
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| Abstract: | A new trilobite, Longaspis paiwuensis n. gen. n. sp., from the Balang Formation (Cambrian Stage 4) in northwestern Hunan, South China, is described. This rare trilobite adds to an expanding taxonomic list of organisms recognized from the Balang Lagerstätte, a deposit of exceptional preservation from the Cambrian. Longaspis paiwuensis is an unusually large-sized, micropygous oryctocephalid trilobite that has proparian facial sutures, pit-like lateral glabellar furrows, up to 17 thoracic segments, and a distinct medial notch in the pygidium; it lacks marginal spines.The classification of the family Oryctocephalidae is reviewed. Three subfamilies are recognized, and Longaspis n. gen. is assigned to the subfamily Oryctocarinae. |
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| Keywords: | Oryctocephalid trilobite Balang Formation Cambrian Stage 4 NW Hunan South China |
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