pneumatized (air-filled) vertebral column and a robustly-built, (backwards oriented) . In 2010, Senter and James used hindlimb length equations to predict the total length of the hindlimbs in Therizinosaurus and Deinocheirus. They concluded that an average Therizinosaurus may have had approximately long legs. More recently, Mike Taylor and Matt Wedel suggested that the whole neck would be 2.9 times the size of the humerus, which was , resulting in a long neck based on comparisons with the series of Nanshiungosaurus. The most distinctive feature of Therizinosaurus was the presence of gigantic unguals on each of the three digits of its hands. These were common among therizinosaurs but particularly large and stiffened in Therizinosaurus, and they are considered as the longest known from any terrestrial animal. Forelimbs The arm of Therizinosaurus covered in total length (humerus, radius and second metacarpal with phalanges lengths). The measured long with a stocky and flattened dorsal blade, wide acromial process (bony extension) and a very widened ventral surface. Near the anterior edge of the scapular widening and near the suture (bone joint), a foramen was located; it likely functioned as a channel for blood vessels and nerves when alive. The posterior edge of the scapula was robust and the was lightly built, likely fused into a cartilaginous system with its periphery in life. The measured in length, it had a broad and convex lateral surface that formed a slightly inclined concavity near of the scapulocoracoid suture. This concavity bent down towards the scapular widening. Near the scapulocoracoid suture, this edge turned very thin and possibly into cartilage along with the periphery of the coracoid in life, as the case of the scapular edge. A large foramen was also present on the coracoid. The was broad and deep, slightly pointing to the outer lateral side. It had robust and convex crest-like borders. The supraglenoid thickness was developed in a convex crest-shaped form, it was divided across the top of the scapulocoracoid suture. The attachment for the biceps muscle was prominently developed by a large tubercle with a stocky top, indicating powerful muscles in life. The was robustly built, measuring long. It had a broad upper end. The (deltoid muscle attachment) was particularly long and thick, with its top located approximately 1/3 from the upper end. The length of the crest was no less than 2/3 the length of the whole bone element. The lower end of