The Three Theropods

Here is a drawing I had been doing during my summer vacation, probably two months ago, depicting Giganotosaurus, Tyrannosaurus, and Majungasaurus. In the case of the T-Rex, I have him a speculative beak made of keratin that would have degraded over time during the fossilization process once it was either killed or it died of natural causes. I also gave the three theropods of the Cretaceous some flesh bumps to give them more detail. Notice, also, that compared to the Tyrannosaurus and Giganotosaurus, who sport croc-like mouths (which I believe would have been more likely due to the fact that they are both large predators with powerful jaws and are more closely related to other archosaurs such as pterosaurs, birds, and crocodiles than with lizards), the Majungasaurus has its teeth covered, mainly due to that fact of its size and convergent evolution that makes both it and other abeliosaurs a distinctive look. Personally, I think the enamel argument promoted by lip-fetishists among the paleoart community is kind of weak. For theropods, the teeth are attached in root sockets whereas squamates lizards have two unique variations of teeth. Let us not forget the fact that tyrannosaurs have mouths equipped with heterodnt teeth and are known by scientists to have bone-crushing jaws. In addition to this, we also have emperical evidence of facial biting and pathologies so having the presence of 'extended "lips' would probabaly make for some serious traumatic injuries in locked combat either with a Triceratops fighting for it's life or any hadrosaur for that matter. I would rather stick with Thomas Carr and his take on the mouths of tyrannosaurs and I would say the same to charcharodontosaurs, allosaurs, and megalosaurus, on that matter, but at the same time, since the teeth of abeliosaurs and dromeosaurs are, as far as I am concerned, not as specialized as the either the previously mentioned theropod families or those with more bird-like beaks, it would be safe to say that those two groups would have some form of teeth covering lips. Anyways hope you guys enjoy my reconstruction of these three warm-blooded reptiles from our prehistoric past!