User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-4775842-20120602160611/@comment-1011548-20120603201822

Wikia Contributer was doing really well until his second paragraph.

Monster X Subspecies did not evolve from Monster X. (For that matter, neither did monster x evolve from monster Y).

Monster X Subspecies and Monster X both split off fairly recently from the same ancestor. This ancestor may have traveled to different climates (as in the case of Barioth, Blagonga, whatever) and each separate population would evolve differently in each habitat, depending on the pressures.