|A cast of the Cleveland Skull next to a cast of an adult Tyrannosaurus rex skull in the striking dinosaur gallery of the Royal Ontario Museum.|
1. "Carnivorous Dinosaurs attaining very large size." Tarbosaurus got as large as the average Tyrannosaurus, so this is invalid even within Tyrannosauridae.
2. "Humerus believed to be of large size and elongate (Brown)." This was based on an incorrectly identified bone.
3. "No evidence of bony dermal plates (Brown)." This was to distinguish it from Dynamosaurus, whose holotype had incorrectly referred plates.
Well, guess Tyrannosaurus is an invalid taxon we can't refer the Cleveland skull to...
Rozhdestvensky, A. K. 1965. [Growth changes in Asian dinosaurs and some problems of their taxonomy]. Palaeontological Zhurnal 1965:95-100. (Translated from the Russian.)