Species: gracilicrus OSMOLSKA, 1987
Etymology: Latin, gracilis, "slender" and Latin, crus, "shin," because of very long and slender shin.
= Saurornithoides sp OSMOLSKA, 1982

Holotype: ZPAL MgD-I/174

Locality: Altan Ula IV, Nemegt Basin, Ömnögov (South Gobi), Mongolia.

Horizon: Nemegt Formation.

Biostratigraphy: Tarbosaurus bataar and Saurolophus angustirostris Zone.

Age? ?Late Campanian or Early Maastrichtian Stage, Senonian Subepoch, Gulf Epoch, Late Cretaceous.

Material: Incomplete left and right tibiotarsi, proximal portion of fibula; of the left pes- distal parts of metatarsals II and IV, second digit with phalanx II-2 damaged, third digit including only distal end of phalanx III-1 and slightly damaged phalanx III-3, almost complete fourth digit with proximal part of ungual lacking; of the right pes-distal portions of articulated metatarsals II, III and IV, complete second digit, but phalanx II-2 lacking ventrodistal "heel", third digit with preserved distal end of phalanx III-1, phalanx III-2 dorsodistally with some damaged and phalanx III-3 ventrodistally with some damage, ungual with damaged dorsal edge, complete fourth digit with ungual somewhat damaged at the dorsal edge.