Yunmenglong

Yunmenglong; Temporal range: Early Cretaceous,
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Clade:	Dinosauria
Clade:	Saurischia
Clade:	†Sauropodomorpha
Clade:	†Sauropoda
Clade:	†Macronaria
Clade:	†Somphospondyli
Genus:	†Yunmenglong; Lü et al., 2013
Type species
	†Yunmenglong ruyangensis; Lü et al., 2013

Yunmenglong (meaning "Yunmeng dragon", after the Yunmengshan area where it was found[1]) is an extinct genus of somphospondylan sauropod known from the late Early Cretaceous of Henan Province, central China. Its remains were discovered in the Haoling Formation of the Ruyang Basin. The type species is Yunmenglong ruyangensis, described in 2013 by Junchang Lü et al. on the basis of an incomplete postcranial skeleton. Yunmenglong shares some characters with Euhelopus, Qiaowanlong and Erketu, and a phylogenetic analysis places it as a sister taxon of Qiaowanlong, both grouped with Erketu in a position more derived than Euhelopus but basal to Titanosauria. [1]

Size

Yunmenglong was a giant sauropod dinosaur, as evidenced by the complete right femur 192 cm long and 65 cm in distal width, which is comparable to other giant Chinese genus Fusuisaurus.[2] In 2016 Paul estimated it at 20 meters (65.6 ft) and 30 tonnes (33 short tons).[3] In 2020 Molina-Pérez and Larramendi gave a larger length of 27 meters (88.6 ft) and a similar weight of 29 tonnes (32 short tons).[4]

References

Lü, J.; Xu, L.; Pu, H.; Zhang, X.; Zhang, Y.; Jia, S.; Chang, H.; Zhang, J.; Wei, X. (2013). "A new sauropod dinosaur (Dinosauria, Sauropoda) from the late Early Cretaceous of the Ruyang Basin (central China)". Cretaceous Research. 44: 202–213. doi:10.1016/j.cretres.2013.04.009.
Jinyou Mo, Jincheng Li, Yunchuan Ling, Eric Buffetaut, Suravech Suteethorn Varavud, Suteethorne Haiyan Tong, Gilles Cuny, Romain Amiot & Xing Xu (2020). New fossil remain of Fusuisaurus zhaoi (Sauropoda: Titanosauriformes) from the Lower Cretaceous of Guangxi, southern China. Cretaceous Research: 104379 (advance online publication). doi: https://doi.org/10.1016/j.cretres.2020.104379
Paul, Gregory S. (2016). The Princeton Field Guide to Dinosaurs 2nd Edition. New Jersey: Princeton University Press. p. 224.
Molina-Pérez & Larramendi (2020). Dinosaur Facts and Figures: The Sauropods and Other Sauropodomorphs. New Jersey: Princeton University Press. p. 262.

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[Yunmenglong-1] Lü, J.; Xu, L.; Pu, H.; Zhang, X.; Zhang, Y.; Jia, S.; Chang, H.; Zhang, J.; Wei, X. (2013). "A new sauropod dinosaur (Dinosauria, Sauropoda) from the late Early Cretaceous of the Ruyang Basin (central China)". Cretaceous Research. 44: 202–213. doi:10.1016/j.cretres.2013.04.009.

[2] Jinyou Mo, Jincheng Li, Yunchuan Ling, Eric Buffetaut, Suravech Suteethorn Varavud, Suteethorne Haiyan Tong, Gilles Cuny, Romain Amiot & Xing Xu (2020). New fossil remain of Fusuisaurus zhaoi (Sauropoda: Titanosauriformes) from the Lower Cretaceous of Guangxi, southern China. Cretaceous Research: 104379 (advance online publication). doi: https://doi.org/10.1016/j.cretres.2020.104379

[3] Paul, Gregory S. (2016). The Princeton Field Guide to Dinosaurs 2nd Edition. New Jersey: Princeton University Press. p. 224.

[4] Molina-Pérez & Larramendi (2020). Dinosaur Facts and Figures: The Sauropods and Other Sauropodomorphs. New Jersey: Princeton University Press. p. 262.