Xianshanosaurus

Xianshanosaurus; Temporal range: Early Cretaceous, Aptian–Albian PreꞒ Ꞓ O S D C P T J K Pg N
	Reconstructed skeleton
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Clade:	Dinosauria
Clade:	Saurischia
Clade:	†Sauropodomorpha
Clade:	†Sauropoda
Clade:	†Macronaria
Clade:	†Somphospondyli
Clade:	†Titanosauria
Genus:	†Xianshanosaurus; Lü et al., 2009
Type species
	Xianshanosaurus shijiagouensis; Lü et al., 2009

Xianshanosaurus (meaning "Xianshan lizard") is a genus of titanosaur sauropod dinosaur from the Early Cretaceous (Aptian-Albian) of the Ruyang Basin in Henan Province, China. It was described in 2009 by a team of Chinese paleontologists. The type species is X. shijiagouensis.^[1]

Classification[]

Mathew Wedel and Mike Taylor, made a cladistic analysis of the pneumaticity of caudal vertebrae. The analysis found that Xianshanosaurus was a basal titanosaurian, with Malawisaurus and Trigonosaurus as its sister taxa. The cladogram found is shown below:^[2]

Macronaria

Camarasaurus

Giraffatitan

	Cedarosaurus

	Venenosaurus

Malawisaurus

Trigonosaurus

Xianshanosaurus

	Gondwanatitan

	Aeolosaurus

	Alamosaurus

	Opisthocoelicaudia

Neuquensaurus

	Rocasaurus

	Saltasaurus

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Habitat[]

Xianshanosaurus shared its habitat with Ruyangosaurus, "Huanghetitan" ruyangensis, Yunmenglong, Luoyanggia, and Zhongyuansaurus. The Haoling Formation was initially thought to be Cenomanian in age, but is now considered Aptian-Albian.^[3]

References[]

^ Lü, J.; Xu, L.; Jiang, X.; Jia, S.; Li, M.; Yuan, C.; Zhang, X.; Ji, Q. (2009). "A preliminary report on the new dinosaurian fauna from the Cretaceous of the Ruyang Basin, Henan Province of central China". Journal of the Paleontological Society of Korea. 25: 43–56.
^ Wedel, M. J.; Taylor, M. P. (2013). "Caudal Pneumaticity and Pneumatic Hiatuses in the Sauropod Dinosaurs Giraffatitan and Apatosaurus". PLOS ONE. 8 (10): e78213. Bibcode:2013PLoSO...878213W. doi:10.1371/journal.pone.0078213. PMC 3812994. PMID 24205162.
^ Xu, L., Pan, Z.C., Wang, Z.H., Zhang, X.L., Jia, S.H., Lü, J.C., Jiang, B.L., 2012. Discovery and significance of the Cretaceous system in Ruyang Basin, Henan Province. Geological Review 58, 601-613.

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[1] Lü, J.; Xu, L.; Jiang, X.; Jia, S.; Li, M.; Yuan, C.; Zhang, X.; Ji, Q. (2009). "A preliminary report on the new dinosaurian fauna from the Cretaceous of the Ruyang Basin, Henan Province of central China". Journal of the Paleontological Society of Korea. 25: 43–56.

[wedel2013-2] Wedel, M. J.; Taylor, M. P. (2013). "Caudal Pneumaticity and Pneumatic Hiatuses in the Sauropod Dinosaurs Giraffatitan and Apatosaurus". PLOS ONE. 8 (10): e78213. Bibcode:2013PLoSO...878213W. doi:10.1371/journal.pone.0078213. PMC 3812994. PMID 24205162.

[3] Xu, L., Pan, Z.C., Wang, Z.H., Zhang, X.L., Jia, S.H., Lü, J.C., Jiang, B.L., 2012. Discovery and significance of the Cretaceous system in Ruyang Basin, Henan Province. Geological Review 58, 601-613.

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