User blog comment:Kogath/Monster Hunter X Discussion/@comment-6050823-20160206180951/@comment-6050823-20160206201948

So let's see:
 * It uses two unidentified skulls normally, giving it the appearance of using two heads.
 * Modified jaw bone/chin of an Uragaan.
 * Modified version of the Shell Shockers from Lagiacrus.
 * Brachydios' pounder.
 * A fused together Dinovaldo jawbone and tail.