Tyrannosaurus titanos was Tyrannosaurus, but with one serious difference - they call it "titanos" for a reason. This thing was almost as big as a Spinosaurus, and it was very scary.
Think T. rex, but with skin better camouflaged in the jungles of southern North America where it lives, slightly longer front teeth and only slightly smaller than a Spinosaurus. It lived from 66 to 65 million years ago and preyed upon Alamosaurus and juvenile Ultimasaurs. It was directly in the line of fire when the asteroid hit and the species is believed to have gone extinct in under a minute. Nothing left but ashes.