Talk:Monster Hunter Evolution - My Theories/@comment-5913830-20120909195248/@comment-4212769-20121117084427

Tigrex' ancestor is the ancestor of all Wyverns. But it was almost exactly like Tigrex today so you could call that ancestor Tigrex as well. Like Cottenmouth said like the Coelacanths.

Gigginox is far more adapted than Tigrex. It totally evolved to live in the caves and no where else. That's adaptation. Although Tigrex hunts in the Tundra/Snowy Mountains it hasn't adapted to this habitat much. It can be seen by far, except its claws it has nothing to grip the ice and it has no time to adapt there. It's more suited for the desert though it isn't as much adapted as for example Diablos or Hapurubokka. As it lives in such different areas it couldn't adapt solely to one (same with Tigrex Subspecies).

Rathian and Rathalos have the intelligence to know where they can live and where not. So this intelligence is more or less their adaptation to live in different regions. And this intelligence is also the reason why the early Tigrex could have evolved into them.

Gigginox is surely hard to imagine to be evolved from Tigrex though it has similarities enough to show it isn't in another evolutionary strand as other Pseudowyverns.