Journal of Earth Science

, Volume 23, Issue 1, pp 33–40

A new eosauropterygian (Diapsida: Sauropterygia) from the Middle Triassic of Luoping, Yunnan Province

  • Long Cheng程龙
  • Xiaohong Chen陈孝红
  • Xiongwei Zeng曾雄伟
  • Yongjian Cai蔡永健
Article

DOI: 10.1007/s12583-012-0231-z

Cite this article as:
Cheng, L., Chen, X., Zeng, X. et al. J. Earth Sci. (2012) 23: 33. doi:10.1007/s12583-012-0231-z

Abstract

A new eosauropterygian, Largocephalosaurus polycarpon gen. et sp. nov., was described based on a skeleton from the Middle Triassic of Luoping (罗平), Yunnan (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.

Key Words

YunnanTriassicGuanling FormationSauropterygia

Copyright information

© China University of Geosciences and Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Long Cheng程龙
    • 1
    • 2
  • Xiaohong Chen陈孝红
    • 2
  • Xiongwei Zeng曾雄伟
    • 2
  • Yongjian Cai蔡永健
    • 3
  1. 1.Key Laboratory of Biogeology and Environmental Geology of Ministry of EducationChina University of GeosciencesWuhanChina
  2. 2.Wuhan Institute of Geology and Mineral ResourcesWuhanChina
  3. 3.Wuhan Institute of Earthquake EngineeringWuhanChina