Ben Creisler
A new paper:
Omeisaurus puxiani sp. nov.Â
Chao Tan, Ming Xiao, Hui Dai, Xu-Feng Hu, Ning Li, Qing-Yu Ma, Zhao-Ying Wei, Hai-Dong Yu, Can Xiong, Guang-Zhao Peng, Shan Jiang, Xin-Xin Ren & Hai-Lu You (2020)
A new species of Omeisaurus (Dinosauria: Sauropoda) from the Middle Jurassic of Yunyang, Chongqing, China.
Historical Biology (advance online publication)
doi:
https://doi.org/10.1080/08912963.2020.1743286 https://www.tandfonline.com/doi/abs/10.1080/08912963.2020.1743286
A new species of Omeisaurus, O. puxiani sp. nov., from the Middle Jurassic of Southwest China is reported. The holotype consists of partial articulated vertebrae, forelimb, hind limb and other materials of an individual. Comparative study and cladistic analysis show that this new taxon belongs to Omeisaurus, and bears a unique combination of character states, such as all presacral vertebrae opisthocoelous, complex pneumatic fossa system in middle cervical centra, lateral fossae of dorsal centra divided by secondary septa, end of anterior caudal neural spines expanding posteriorly, edge of humerus deltopectoral crest turning posterolaterally and ratio of length of ulna to humerus of 0.69. The previously reported single middle cervical (S66) from the same locality and horizon can be referred to this new species. The discovery of Omeisaurus puxiani enriches the diversity of the genus of Omeisaurus and provides additional information to help understanding the evolutionary history of this genus in Eastern China.