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Found: Baker County, Montana 9.5 cm Label says Tyrannosaurus but with a question mark. So, is it Tyrannosaur, or even Theropod? So many of these bone pieces labelled tyrannosaur actually turn out to be Edmontosaurus. I am guessing narrowing it down to T-Rex would be very unlikely and difficult? Thanks for the help.
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Mammals Have Diverse Arms, And Have Since Before Dinosaurs Showed Up
Scylla posted a topic in Fossil News
In Synapses vs Saurapsids, Synapsids get more diverse forelimbs. https://m.phys.org/news/2019-03-mammals-unique-arms-evolving-dinosaurs.html-
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- mammal evolution
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Partial right humerus (upper arm) of an undiscribed Dromaeosaurid. The size is very similar to that of Bambiraptor. This animal was possibly just over a meter long.
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From the album: Mammal Fossils
Coelodonta antiquitatis (Blumenbach, 1799) Proximal fragment of a left radius of a woolly rhino. Location: North Sea, Netherlands Age: Pleistocene© © Olof Moleman
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From the album: Mammal Fossils
Coelodonta antiquitatis (Blumenbach, 1799) The right ulna of a woolly rhino. The bottom joint is missing. Location: North Sea, Netherlands Age: Pleistocene© © Olof Moleman