User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-6005381-20130203132053/@comment-4502434-20130205000733

I didn't say it wasn't a Rathian, just a signifigantly different one.

And I find the idea of the HC and Supremacy monsters simply being different genders... unlikely. I think they are likely older and more experienced members of the species. Which really doesn't explain HC basarios, but well, we can never know any of this for sure.