Answer :
The given condition of the Pachycephalosaur specimen belonging to genus Goyocephale indicates that it is a juvenile specimen due to the evident juvenile state of the skull.
The skull of a Pachycephalosaur went through drastic changes as it matured and grew in size. The younger ones during the juvenile state possessed a flat skull with sizeable spikes on the head. However, as the Pachycephalosaur grew in size the spikes became small and it developed a huge cranial dome.
Goyocephale represents an extinct genus that existed in Mongolia during the late Cretaceous period around 76 million years ago. It is an example of a primitive Pachycephalosaur.
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