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Post by Supercommunist on Dec 20, 2015 16:08:49 GMT 5
 So did Zhuchengtyrannus and tarbosaurus inhabit the same ecosystem? And if so, how do you think they interacted with them? Is is possible that they could have interbred? |
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Post by creature386 on Dec 20, 2015 17:01:14 GMT 5
The description paper of Zhuchengtyrannus claims they did coexist: www.ivpp.ac.cn/qt/papers/201403/P020140313544360825683.pdfInterbreeding is sometimes possible even if the two animals only share a sub-family, though it would have probably not happened in the wild (and the offspring couldn't have reproduced anyway). But the definition of what counts as a subfamily and what is a genus/family is swampy anyway, particularly if we talk about extinct animals. |
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blaze
Paleo-artist 
Posts: 766
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Post by blaze on Dec 21, 2015 1:25:29 GMT 5
According to Hone et al. (2012), the quarry where Zhuchengtyrannus was found comes from the transition between the Xingezhuang formation and the overlying (younger) Hongtuya formation, they cite Liu et al. (2011) for a 73.5Ma date from the upper part of the Hongtuya formation, suggesting Zhuchengtyrannus has to be older, perhaps 74-75Ma, definitely Campanian in age, in comparison the commonly accepted age for the Nemegt formation and thus Tarbosaurus, is around 70Ma, negating any possibility of them being contemporaneous however Loewen et al. (2013) says that Liu et al, provide neither evidence nor citation for that age so who knows, they (Loewen et al.) however did depict age range of Zhuchentyrannus as ~74.5-73.5Ma while that of Tarbosaurus was given at 71-68Ma in figure 4.
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