User blog comment:Aandrew07/Discussion of the Week: Subspecies/@comment-1011548-20121022102312/@comment-4212769-20121022191925

I think you should better let Rusted Kushala Daora out as it isn't a subspecies and is not treated like one either. It doesn't even give any different materials. It is more like a revamped version of Kushala Daora, like the one-ear Yian Garuga and the one-horn Diablos (and the others you mentioned).