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Raptorex = Tarbosaurus?

Galvasean · 2019-09-05 00:42:21

Whilst debate is ongoing as to whether or not Nanotyrannus of Cretaceous North America is a juvenile Tyrannosaurus or not, a similar debate has emerged in relation to two Asian tyrannosaurs. Raptorex kreigsteini was believed to be a 'primitive' small bodied ancestor type to the giant tyrannosaurs of the late Cretaceous.…

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05-09-2019 1:42am

#1

Galvasean

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Whilst debate is ongoing as to whether or not Nanotyrannus of Cretaceous North America is a juvenile Tyrannosaurus or not, a similar debate has emerged in relation to two Asian tyrannosaurs.
Raptorex kreigsteini was believed to be a 'primitive' small bodied ancestor type to the giant tyrannosaurs of the late Cretaceous. However, a new paper (available for free at PLoS ONE) questions this conclusion. It appears that Raptorex is almost certainly a juvenile of something larger, possibly Tarbosaurus. Another idea is that it does represent it's own valid genus, but reports of it being adult or close to adult age look to be erroneous.

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