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Dawazisaurus Brevis, A New Eosauropterygian from the Middle Triassic of Yunnan, China

Acta Geologica Sinica(English Edition) 2016年第2期90卷 401-424页

作者： CHENG Yen-nien WU Xiao-chun TAMAKI SATO SHAN His-yin National Museum of Natural Science 1 Kuan Chien Road Taichung Taiwan 40453 China Department of Earth Sciences National Cheng Kung University 1 University Road Tainan Taiwan 701 China Canadian Museum of Nature PO Box 3443 STN 'D’ Ottawa Ontario KIP 6P4 Canada tokyo gakugei university 4-1-1 Nukui-Kita-Maehi Koganei City Tokyo 184-8501 Japan

Dawazisaurus brevis（gen. et sp. nov.） is a newly discovered Triassic marine reptile, represented by a complete skeleton from Member II of the Guanling Formation of Luoping, Yunnan Province, China. This paper aims to（1） present a thorough description of the species,（2） make a detailed comparison to demonstrate if the species can be referred to any known sauropterygian taxa, and（3） conduct phylogenetic analyses to establish the internal relationships of the species with other sauropterygians. In addition, the discovery of Dawazisaurus provides a chance not only to test the phylogenetic patterns of the Sauropterygia obtained by previous studies but also to evaluate the previous hypotheses on the origin of the sauropterygian groups at different levels. D. brevis is an eosauropterygian, characterized by a unique combination of derived features such as a pair of large nasals joining in the formation of the internarial septum, a short trunk with 16 dorsal vertebrae; the zygapophyses of the trunk vertebrae very small or weakly developed; the posterior margin of the skull roof deeply V-shaped, and an ossified distal carpal 5. Phylogenetic analysis indicates that D. brevis appears to be more closely related to the Nothosauroidea than the Pistosauroidea within the Eosauropterygia.

关键词： Sauropterygia Dawazisaurus brevis Guanling Formation Early Triassic Yunnan China

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A redescription of the ichnospecies Koreanaornis anhuiensis(Aves) from the Lower Cretaceous Qiuzhuang Formation at Mingguang city, Anhui Province, China

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Journal of Palaeogeography 2018年第1期7卷 58-65页

作者： Li-Da Xing Yuan-Chao Hu Jian-Dong Huang Qing He Martin G.Lockley Michael E.Burns Jun Fang State Key Laboratory of Biogeology and Environmental Geology China University of Geosciences Beijing 100083China School of Earth Sciences and Resources China University of GeosciencesBeijing 100083China State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and PalaeontologyChinese Academy of SciencesNanjing 210008Jiangsu ProvinceChina Anhui Geological Museum Hefei 230031Anhui ProvinceChina School of Resources and Environmental Engineering Anhui UniversityHefei 230039Anhui Province China Dinosaur Trackers Research Group University of Colorado DenverPO Box 173364DenverCO 80217USA Department of Biology Jacksonville State University700Pelham RdJacksonvilleFL 36265USA

The Cretaceous bird trackway originally labeled Aquatilavipes anhuiensis, in 1994, had previously been examined, photographed and replicated, but never described or illustrated in detail. However, it has been part of a widening discussion about the distribution of Aquatilavipes and Koreanaornis in China(and Korea). Here we illustrate and formally describe the holotype in detail and assign it to Koreanaornis(Koreanaornis anhuiensis) as informally proposed by previous authors. We also demonstrate that most authenticated reports of Koreanaornis, including the Anhui occurrence, are from the Lower Cretaceous, not from the Upper Cretaceous as previously reported.

关键词： Lower Cretaceous Ichnospecies Koreanaornis Aquatilavipes Qiuzhuang Formation Anhui Province

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