Bactrosaurus
genus of reptiles (fossil)
Bactrosaurus was a hadrosaur from the Upper Cretaceous about 70 milion years ago. This plant-eating dinosaur. was found in the Gobi Desert of China. It was about 6 metres (20 feet) long and 2 metres (6.6 feet) high when standing on all fours. It weighed 1.1 to 1.5 tonnes (2,400 to 3,300 pounds).
| Bactrosaurus Temporal range: Upper Cretaceous,
~96 mya | |
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| Skeleton on display at the Central Museum of Mongolian Dinosaurs, Ulaanbaatar | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Dinosauria |
| Order: | †Ornithischia |
| Suborder: | †Ornithopoda |
| Clade: | †Hadrosauromorpha |
| Genus: | †Bactrosaurus Gilmore, 1933 |
| Type species | |
| †Bactrosaurus johnsoni Gilmore, 1933
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| Species | |
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Research showed that this genus and its near relatives were unusually prone to cancer. Among more than 10,000 specimens x-rayed, tumors were only found in these Cretaceous hadrosaurs (duck-billed dinosaurs).[1] The reason for this is not known.
References
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