Mandschurosaurus
Mandschurosaurus (meaning "lizard from Manchuria") is a genus of hadrosaurs based on material from the Upper Cretaceous of China.
Mandschurosaurus | |
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Reconstructed M. amurensis skeleton in outdated tripod-pose, VSEGEI Museum, St. Petersburg | |
Scientific classification | |
Kingdom: | Animalia |
Phylum: | Chordata |
Clade: | Dinosauria |
Order: | †Ornithischia |
Suborder: | †Ornithopoda |
Family: | †Hadrosauridae |
Genus: | †Mandschurosaurus Riabinin, 1930 |
Type species | |
†Mandschurosaurus amurensis Riabinin, 1925 | |
Species | |
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History of discovery
M. amurensis is based on a poorly preserved and incomplete skeleton collected by Russian scientists in 1914 from the banks of the Amur River. It was the first dinosaur genus named from China, and a mounted skeleton is on display at the Central Geological and Prospecting Museum in St. Petersburg. However, much of the skeleton is plaster. Regardless, the remains represent a large hadrosaurid. There has been some debate regarding the validity of this genus. Brett-Surman (1979) first considered it a nomen dubium, though some later workers have continued to see it as a valid taxon (Chapman et Brett Surman, 1990, for example). Most recently, Horner et al. (2004) listed the type species as a nomen dubium. The holotype material was initially referred to the genus "Trachodon" (also a nomen dubium), but later reassigned to a new genus by Riabinin (1930).
Over the years, three species have been placed within this genus: Mandschurosaurus amurensis, M. mongoliensis, and M. laosensis. Brett-Surman (1979) considered M. mongoliensis a distinct genus, which he named Gilmoreosaurus. Horner et al. (2004) considered M. laosensis a nomen dubium. This leaves only Riabinin's original species, M. amurensis, as a possibly valid taxon.
See also
References
- Brett-Surman M. K. (1979). "Phylogeny and palaeobiogeography of hadrosaurian dinosaurs". Nature. 277 (5697): 560–562. Bibcode:1979Natur.277..560B. doi:10.1038/277560a0.
- Chapman R. et Brett-Surman M. K. 1990. Morphometric observations on hadrosaurid ornithopods. in Carpenter K. et Currie, P. J. (eds.), Dinosaur Systematics: Perspectives and Approaches, Cambridge University Press, Cambridge 163-177.
- Horner J., Weishampel D. B., et Forster C. A. 2004. Chapter Twenty: Hadrosauridae. in The Dinosauria (2nd edition), Weishampel D. B., Dodson P., and Osmólska H., editors. University of California Press.
- Riabinin A. N. (1930). "Mandschurosaurus amurensis nov. gen, nov. sp. a hadrosaurian dinosaur from the Upper Cretaceous of the Amur River". Soc. Paleontol. Russ. Mem. 2: 1–36. [Russian]