That tiny thing is supposed to be an Ultralisk? I'd have figured Lurker on the shape of the head and mouth, as well as the arrangement of the legs. Funny, that'd make the first time I've ever really seen what the hell a Lurker's legs are supposed to look like...
Unless the artist named it an Ultralisk, it looks like a Lurker to me. Even if the artist DOES think that's what an Ultralisk looks like, it still looks like a Lurker to me...
Technically speaking, this looks nothing like ANY zerg breed. I'm sure because I'm a complete nerd when it comes to StarCraft lore. I doubt the artist was trying to draw any particular unit either.
Actually it looks more like the brute in Dead Space.