Wikipedia, (I realize, not the most reliable website) states, "Subsequent finds in northern China allowed paleontologists to assemble the general skeletal structure of the animal,..." What exactly was found? How did these finds help to categorize this creature? What do "Erlikosaurus and Segnosaurus" have to do with categorizing? See website: http://en.wikipedia.org/wiki/Therizinosaurus

I'm trying to understand the classification of a dino that went from claws and forearms to this creature. What fossils, exctly, have been found?