Originally Posted by
hamishspence
Stegosaurus is not a biped- it's a quadruped- which don't have a height limit- only a "length to base of tail" limit.
(also, it's tail looks a bit shorter than the rest of its body, to me).
And for Huge creatures- that's 16 ft long minimum.
As for theropods like Allosaurus, they tend to have a very horizontal posture- so leg length might be a better guideline, than "height the creature can raise its head to".
The smallest Medium bipedal creatures will be 4 ft tall- which corresponds to a leg length of around 2 ft.
For Large creatures, this will be 8 ft tall- leg length around 4 ft.
For Huge creatures, this will be 16 ft tall- leg length around 8 ft.
I'd agree that subadult Allosaurus, and maybe smaller adult Allosaurus, would be better as Large than Huge- but, if the bones originally labelled Epanterias, are in fact typical of fully grown members of the largest Allosaurus species(rather than freakishly large individuals) it might be, that at least one Allosaurus species, would have a basic size of Huge, rather than having to be advanced in size.