They aren't as compact as Seramas, do have short legs, but they have a clearly different type, and are bigger [though still a very small breed] but the strut of the bird in the picture above makes it hard to tell the body type too well. Serama is still a possiblity.
Thanks for the infor Griffinsong. rwdygrl, you might try posting his pic (might try to get a better side view) to either a Serama, or Dutch bantam thread. Good luck with your little roo!