[Sorry bro, rodent's don't lay eggs. So she falls into the monotreme category...egg-laying mammal.]

Well, I guess that's because Mobians wouldn't exist in your dimension so I can't fault you on that. I talk the same way you do though, see, I open my mouth and out come words...but you're wondering something else. I think I can answer that.

Mobosapians had animal ancestors, but when nearly everything on Earth was obliterated by something called Gene Bombs...from the primordial soup rose the Mobians. I guess somewhere along the way our genetics mixed with the genetics of humans...and there are Overlanders...more direct descendants of humans, but they're beastly for the most part.