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Largocephalosaurus, new Triassic marine reptile (Sauropterygia) from China



From: Ben Creisler
bcreisler@gmail.com


A new marine reptile paper:


Long Cheng, Xiaohong Chen, Xiongwei Zeng and Yongjian Cai (2012)
A new eosauropterygian (Diapsida: Sauropterygia) from the Middle
Triassic of Luoping, Yunnan Province.
Journal of Earth Science 23(1):33-40
DOI: 10.1007/s12583-012-0231-z
http://www.springerlink.com/content/m61hw4g663q5461r/



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