It is indeed a dragon subspecies - listed as "Dragon family, reptile type", same as the Wyvern. Wider habitat (mountains are just one of three listed), same diet ("Carnivorous, things such as local wildlife"), and I'm not feeling energetic enough to go looking for matches for her disposition.
I'm not going to make the call as to whether the lamia tag applies or not; she's definitely not by MGE classification, but might well be close enough for Danbooru tagging purposes.
