Mongolosaurus

Mongolosaurus is a genus of titanosauriform sauropod dinosaur which lived during the Early Cretaceous of China.[1]

Mongolosaurus
Temporal range: Early Cretaceous,
Drawing of a tooth from M. haplodon
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Clade: Dinosauria
Clade: Saurischia
Clade: Sauropodomorpha
Clade: Sauropoda
Clade: Macronaria
Clade: Somphospondyli
Genus: Mongolosaurus
Gilmore, 1933
Type species
Mongolosaurus haplodon
Gilmore, 1933

Discovery and systematics

In 1928 a team from the American Museum of Natural History, headed by Roy Chapman Andrews, at On Gong Gol near Hukongwulong in Inner Mongolia, in Quarry 714 discovered a sauropod tooth. In 1933 Charles W. Gilmore, based on this fossil, named and described the type species Mongolosaurus haplodon. The generic name refers to Mongolia. The specific name is derived from Greek haploos, "single", and odon, "tooth".[1]

The holotype, AMNH 6710, was found in the Early Cretaceous (Aptian-Albian) On Gong Formation. It consists of teeth, a basioccipital from the back of the skull and parts of the first three cervical vertebrae.

Classification

Mongolosaurus was previously assigned to Diplodocidae, Titanosauridae and Euhelopodidae, though recent studies find it to be either a basal titanosaur or a non-titanosaurian somphospondylan.[2][3]

In their 2023 description of the titanosaur Jiangxititan. Mo et al. analyzed the phylogenetic relationships of Mongolosaurus. They recovered Mongolosaurus as a derived member of the titanosaurian clade Lognkosauria, as the sister taxon to Jiangxititan. The results of their phylogenetic analyses are shown in the cladogram below:[4]

Titanosauria

Diamantinasauria

Xianshanosaurus

Daxiatitan

Australodocus

Lithostrotia

Malawisaurus

Aeolosaurus

Rapetosaurus

Isisaurus

Saltasaurus

Opisthocoelicaudia

Alamosaurus

Epachthosaurus

Pitekunsaurus

Tapuiasaurus

Antarctosaurus

Vahiny

Jainosaurus

Normanniasaurus

Rinconsaurus

Muyelensaurus

Nemegtosaurus

Lognkosauria

Mendozasaurus

Argentinosaurus

Futalognkosaurus

Patagotitan

Notocolossus

Puertasaurus

Jiangxititan

Mongolosaurus


References

  1. Gilmore, C.W. (1933). "Two new dinosaurian reptiles from Mongolia with notes on some fragmentary specimens". American Museum Novitates. 679: 1–20.
  2. Mannion, Philip D. (2011). "A reassessment of Mongolosaurus haplodon Gilmore, 1933, a titanosaurian sauropod dinosaur from the Early Cretaceous of Inner Mongolia, People's Republic of China". Journal of Systematic Palaeontology. 9 (3): 355. doi:10.1080/14772019.2010.527379.
  3. Averianov, Alexander; Sues, Hans-Dieter (2017). "Review of Cretaceous sauropod dinosaurs from Central Asia". Cretaceous Research. 69: 184. doi:10.1016/j.cretres.2016.09.006.
  4. Mo, Jin-You; Fu, Qiong-Yao; Yu, Yi-Lun; Xu, Xing (2023-09-21). "A New Titanosaurian Sauropod from the Upper Cretaceous of Jiangxi Province, Southern China". Historical Biology: 1–15. doi:10.1080/08912963.2023.2259413. ISSN 0891-2963.


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