Wumengosaurus Explained

Wumengosaurus is an extinct aquatic reptile from the Middle Triassic (late Anisian stage) Guanling Formation of Guizhou, southwestern China. It was originally described as a basal eosauropterygian and usually is recovered as such by phylogenetic analyses,[1] [2] [3] although one phylogeny has placed it as the sister taxon to Ichthyosauromorpha while refraining from a formal re-positioning.[4] It was a relatively small reptile, measuring in total body length.[1]

In 2021, Qin et al. described an additional specimen from Guizhou (Panzhou District) as a new species of Wumengosaurus, W. rotundicarpus.[5]

Classification

In the 2023 description of Luopingosaurus, Xu et al. recovered Wumengosaurus as a derived pachypleurosaurid, as the sister taxon to the clade formed by Luopingosaurus and Honghesaurus. The results of their phylogenetic analyses are shown in the cladogram below:[6]

Notes and References

  1. 10.1671/0272-4634-28.4.1055 . A New Middle Triassic Eosauropterygian (Reptilia, Sauropterygia) from Southwestern China . 2008 . Jiang . Da-Yong . Rieppel . Olivier . Motani . Ryosuke . Hao . Wei-Cheng . Sun . Yuan-Lin . Schmitz . Lars . Sun . Zuo-Yu . Journal of Vertebrate Paleontology . 28 . 4 . 1055–1062. 2008JVPal..28.1055J . 83909484 .
  2. Cheng . Y. N. . Wu . X. C. . Sato . T. . Shan . H. Y. . A new eosauropterygian (Diapsida, Sauropterygia) from the Triassic of China . 10.1080/02724634.2012.695983 . Journal of Vertebrate Paleontology . 32 . 6 . 1335 . 2012 . 2012JVPal..32.1335C . 85253142 .
  3. Da-Yong Jiang. Ryosuke Motani. Andrea Tintori. Olivier Rieppel. Guan-Bao Chen. Jian-Dong Huang. Rong Zhang. Zuo-Yu Sun. Cheng Ji. amp . 2014 . The Early Triassic eosauropterygian Majiashanosaurus discocoracoidis, gen. et sp. nov. (Reptilia, Sauropterygia), from Chaohu, Anhui Province, People's Republic of China . Journal of Vertebrate Paleontology . 34 . 5 . 1044–1052 . 10.1080/02724634.2014.846264 . 2014JVPal..34.1044J . 129828376.
  4. 10.1371/journal.pone.0102361 . The enigmatic marine reptile Nanchangosaurus from the Lower Triassic of Hubei, China and the phylogenetic affinities of Hupehsuchia . 2014 . Chen . Xiao-hong . Motani . Ryosuke . Long . Chen . Jiang . Da-Yong . Rieppel . Olivier . PLOS ONE . 9 . 7 . e102361 . 25014493 . 4094528. 2014PLoSO...9j2361C . free .
  5. Qin . Yanjiao . He . Xiao . Luo . Yongming . Hu . Xinrui . Jiang . Liangbing . Deng . Xiaojie . Shi . Zhenhua . Ran . Weiyu . 2021 . A New Species of Wumengosaurus from Panxian Fauna in Middle Triassic of Guizhou Province . Guizhou Geology . lzh . 38 . 4 . 373–381 . 1000-5943.
  6. Xu . G.-H. . Shang . Q.-H. . Wang . W. . Ren . Y. . Lei . H. . Liao . J.-L. . Zhao . L.-J. . Li . C. . 2023 . A new long-snouted marine reptile from the Middle Triassic of China illuminates pachypleurosauroid evolution . Scientific Reports . 13 . 1 . 16 . 10.1038/s41598-022-24930-y . 36604433 . 2023NatSR..13...16X . free . 2045-2322. 9816097 .

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