Board Thread:Movie discussion/@comment-26025032-20150714040236/@comment-17754282-20150823094351

108.209.116.49 wrote: QuakingStar wrote: Bring Spino from JP3 back.. he was a true badass.. hunted the humans and killed the Tyrannosaurus Buck(already proved it was an adult male if you checked the wikia you'd know) FINALLY! Someone can speak my language! Just bring him back and the pussy with small arms can step off it throne, and provide it to a new lord and master. LONG LIVE SPINO!

The Spinosaurs were a very specialised and short lived group that lost the evolutionary "arms race" well before the end of the age of the dinosaurs. Their ancestors, the Megalosaurs, also lost out, as did the Allosaurs and their decendents the Carcharodontosaurs. By the late cretaceous, anywhere where large Dinosaurs still dominated, the apex predator had a large head and short arms - in North America and Asia it was the Tyrannosaurs (T rex, Albertosaurus, Tarbosaurus etc) while in South America, Madagascar and India it was the Abelisaurs (Carnotaurus, Majungasaurus, Rajasaurus etc).

If arms were so important why did the large carnivores who had them die out while the short armed varieties dominated right up to the end?