 The forelimbs were long for a dinosaur, over 70% of the length of the hindlimbs.The well-developed deltopectoral crest (a ridge for the attachment of chest and shoulder muscles) of the humerus and prominent olecranon process (where muscles that extend the forearm were attached) of the ulna indicate that the forelimb was powerful as well.There were five digits on the manus ('hand').