User blog comment:- MHCaboose -/Monster Hunter Frontier Z Discussion/@comment-6050823-20180320121036/@comment-20010297-20180321142304

^ I doubt that the Hunter's Guild had anything to do with this one.

If I remember correctly, I believe it was said that Duremudira were placed in the Sky Corridor by the Ancient Civilization to act as guards to the place.

And, as for the Mutation theory, yeah I guess that could make sense, or it could just be some different species/subspecies. Though there is a chance that the Ancient Civilization had some part in creating Duremudira (both kinds), but who knows, really?