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A New Eosauropterygian(Diapsida:Sauropterygia) from the Middle Triassic of Luoping,Yunnan Province

Journal of Earth Science 2012年第1期23卷 33-40页

作者：程龙陈孝红曾雄伟蔡永健 Key Laboratory of Biogeology and Environmental Geology of Ministry of Education China University of GeosciencesWuhan 430074China Wuhan Institute of Geology and Mineral Resources Wuhan 430223China Wuhan Institute of Earthquake Engineering Wuhan 430071China

A new eosauropterygian, Largocephalosaurus polycarpon gen. et sp. nov., was described based on a skeleton from the Middle Triassic of Luoping （罗平）, Ynnnan （云南） Province, southwestern China. The new taxon is characterized by a big skull, paired frontal, laterally expanded upper temporal fossa, anterior process of squamosal entering orbit, robust teeth with basally expanded crown and blunt tip, short cervical region, distinctly elongated transverse process of the dorsal vertebrae, short and broad dorsal ribs, stout gastralia, scapula with distinctly posterodorsally extending blade, distinctly robust humerus, eleven carpal ossifications, and a manual fomula of 2-3-4-5-5. A phylogenetic analysis suggests that Largocephalosaurus is the basal-most member of a clade including Wumengosaurus, European pachypleurosaurs, and Nothosauroidea.

关键词： Yunnan Triassic guanling formation Sauropterygia.

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

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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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Biostratigraphy of Triassic Marine Reptiles in Southwest Guizhou and Its Adjacent Area

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Acta Geologica Sinica(English Edition) 2001年第4期75卷 349-353页

作者： WANG Liting, LI Jinling, WANG Xinjin, LI Chun,WU Tianzhuang and LIU Jun Bureau of Geology and Mineral Exploration and Development of Guizhou ProvinceGuiyang 550004 Institute of Vertebrate Palaeontology and Palaeoanthropology,Chinese Academy of Sciences, Beijing 100044 Guizhou Museum, Guiyang 550004 Bur Geol & Mineral Explorat & Dev Guizhou Provinc Guiyang 550004 Peoples R China Chinese Acad Sci Inst Vertebrate Paleontol & Paleoanthropol Beijing 100044 Peoples R China Guizhou Museum Guiyang 550004 Peoples R China

This paper briefly reviews the Triassic marine reptile fossils in Guizhou Province, especially the fossils that have been recently found in the guanling area. Based on three sections at guanling and Xingyi, Guizhou Province and Luoping, Yunnan Province, four horizons with vertebrate fossils are recognized in the Middle and Upper Triassic of this area; They are from bottom to top: Member I and Member II of the guanling formation, and the Zhuganpo Member and the Wayao Member of the Falang formation.

关键词： Southwest Guizhou Middle and Upper Triassic marine reptiles guanling formation Falang formation

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