What unusual detail suggested external protection on the skin of *Eryops*?

Answer

A pattern of oval bumps

A fossilized 'mummy' specimen preserved evidence showing that the skin of *Eryops* was covered in a pattern of oval bumps, suggesting some degree of external armor or protection.

What unusual detail suggested external protection on the skin of *Eryops*?
extinctionpaleontologyamphibianeryops