Partial hind limbs which include a distinstive second toe with a straight ungual. Until now only reported from the Altan Uul IV locality. There is no siginicant overlap in the known specimens of Tochisaurus nemegtensis, Borogovia gracilicrus and Saurornithoides junior, which were recovered  from the same geographic area, and it is conceivable that they all represent the same species.