User blog comment:WolfQueen/Discussion of the Week: Related Species/@comment-4702773-20150208230308

I wouldn't say they are better than subspecies. Not really comparable to subspecies. Its a bit like comparing apples and oranges. Sure they're both fruit(monsters) and are basically the same-ish shape, but they aren't the same.

Yian Garuga by far. It always seemed like the missing link between Kut-ku and Rath. Awesome looking as well.Monoblos and Diablos are a close second. Just two monsters that evolved in similar areas and ended up different. Has a bit of real-world feel to it, like the Darwin's finches.

Why can't they just call "Unknown - Black Flying Wyvern" what it is: Dark Rathian. Just because she's angry as heck and has some new moves doesn't make her any less of a Rathian. The same could almost be said for Zerureusu, but at least he looks moderately different from a Los.

If we have to have related species, then I would like to see the cousin of Yama Tsukami. Talk about an original monster. Giant flying octopus covered in moss. There must be more like him/her out there. Maybe a more aerodynamic cephalopod, like a squid? That'd be epic, with two long tentecles smashing crap and that giant eye staring, seeing everything. Would be considered a diety.