 A related study also noted a locking mechanism in the lower jaw shared between the two genera . In a separate paper , Currie noted the possibility that Alioramus might represent a juvenile Tarbosaurus , but stated that the much higher tooth count and more prominent nasal crests in Alioramus suggest it is a distinct genus . Similarly , Currie uses the high tooth count of Nanotyrannus to suggest that it may be a distinct genus , rather than a juvenile Tyrannosaurus as most other experts believe . The discovery and description of Qianzhousaurus however , reveals that Alioramus is not a close relation to Tarbosaurus , instead belonging to a newly described family of tyrannosaurids ; the Alioramini . Qianzhousaurus further reveals that similar long @-@ snouted tyrannosaurids were widely distributed throughout Asia and would have shared the same environment while avoiding competition with larger and more robust tyrannosaurines by hunting different prey . 
