Comment on SexyMonolophosaurus by NashD1

right, variety is very probable. Indeed I can imagine animals like Dilophosaurus and Sinosaurus having exposed croc like portions towards the tip i.e. tooth rosette and more fleshy lip structures towards the rear of the jaw. The reason I mentioned Chilesaurus is that it is the earliest known herbivorous theropod yet it does not have a beak but large front teeth, it more fits the pattern of herbivorous lizards/sauropods that never evolved beaks therefore I think basally there were true lizard lipped theropods at some point. However as soon as theropods started messing around with feathers - and therefore potentially losing scales on the face and around the oral margin - that lizard lip morphology was replaced by more fleshy or keratinized oral margins. This transition could have occurred fairly early in theropods. I did consider the tooth pocket design as Saurian depicts their T. rex I just am leery about how much jiggle would be in the lower lip area and if during bites the lower lip would get in the way of the shearing upper dentition. If you plop that lower lip lateral and inferiorly as I depict that problem is solved. A theropod with such lip morphology may have looked eerily like a canid during rapid jaw closures. However if that tooth pocket design was less floppy i.e. had a rim of scales and perhaps supporting gingiva that prevented such flop i could see the tooth pocket design being possible especially in basal theropods.