Noah wasn't surprised that the members of the Empire knew a lot about extinct and ancient creatures. Shandal had lived for so long that he had probably had the chance to study many different species that didn't manage to survive the passage of time.
Instead, what astonished him were the various features of the beast that didn't match the records concerning that species.
There weren't many pieces of information about Tyrannosaurus and their various kinds, but Noah was sure that they didn't have wings. Those two pairs of massive claws didn't match any legend.
Also, the fact that it radiated the aura of a quasi-rank 6 hybrid made that creature appear even more dangerous.
Noah and the others were already on the other side of the battlefield by then. They didn't know how fast the creature was, but they were quite confident that it wouldn't chase them so far away.