To me it looks like it could be a Brute Tigrex, but then you have to take into context the rest of the monsters.
All of the others on that are monsters from 3u (or portable 3rd). So B.Tigrex wouldn't really fit.
I'm thinking based on the body type it could be a Nargacuga. There's a green subspecies in P3rd apparently, and them ears on it are a pretty big giveaway since we cant really see the tail.
That's my guess anyway.