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Post by themechabaryonyx789 on Nov 6, 2013 16:13:20 GMT
Balaur is commonly depicted as a Dromaeosaur, but there is also a possibility it could be an Avalian, which is a herbivorous dinosaur. Your opinions and ideas?
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Post by Theropod on Nov 6, 2013 16:34:16 GMT
I don't see anything wrong with the Balaur holotype, but I still believe in the avalian Balaur theory.
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Post by thesporerex on Nov 6, 2013 17:07:01 GMT
Can someone find Andrea cau's article on balaur being avalian? I can't find it.
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Post by Theropod on Nov 6, 2013 17:45:32 GMT
Can someone find Andrea cau's article on balaur being avalian? I can't find it. I'll try to find it, let me see.
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Post by raptorx863 on Nov 7, 2013 1:06:05 GMT
Balaur is commonly depicted as a Dromaeosaur, but there is also a possibility it could be an Avalian, which is a herbivorous dinosaur. Your opinions and ideas? This is a misconception. Avialans are just the lineage of paravians that are closer to True Birds and enantiornithes than to deinonychosaurians. They don't form a distinct group of animals and indeed the relationships of these groups is still in its infancy. Moreover, most of the avialans weren't herbivores, but ranged from insectivores to predators, and even some piscivorous species. The only known herbivorous avialan was Jehelornis, which has preserved seeds in its stomach and adaptations in the jaw indicative of such a diet. Thus, even if Balaur is an avialan, it does not indicate at all that it is a herbivorous animal than it does any other avialan. Moreover, Andrea Cau's original article where he proposed that Balaur was a herbivore and the paper he made proposing that Balaur are two totally different things. One's not even a study and the other's still very controversial. Finally, Andrea Cau said in a follow-up to the Balaur herbivore post of his that in light of Fowler and co.'s work on the RPR model of dromaeosaurid predation, that anatomy of Balaur may be more congruent with the hypothesis that it was predatory after all: theropoda.blogspot.com/2011/12/extinction-of-dodoraptor.html Now, concerning the possibility that Balaur is an avialan. I'm going to fence-sit and say that they both are very plausible arguments. There are a lot of features in Balaur that are reminiscent of other avialans, and the idea that it was just a large flightless paravian is not impossible with our current knowledge that this happened with a lot of other dromaeosaurid groups. On the other hand however, the study in question that proposed this is VERY controversial. It proposed a lot of conclusions not seen in many other phylogenies, such as troodontids being closer to birds than to deinonychosaurians, and Rahonavis being an avialan rather than an unenlagiine. At the same time though, we're still in our infancy when it comes to paravian phylogeny, so a lot more work is needed to find out where this guy goes.
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