The Arizonasaurus is part of a group of prehistoric crocodile. This “Croc” where as large as 10 feet long and is estimated to have a vicious predators medieval Triassic period.
Hot desert ecosystems. Actually, this would explain the large sail well because the purpose for being there will take in more heat and draw out the heat. It would be a great way to control the activities become dinosaurs quickly when necessary, but relaxed when resting. It is very necessary to be able to capture some herbivores faster.
The purpose of this sailing reptiles, probably served both as the temperature regulation and sexually selected characteristics which means the man with a larger screen has the opportunity to mate with more women.