the femoral shaft. The femur itself is very similar to that of the indeterminate dromaeosaur DGBU-78. The anterior surface of the lower end of the femoral shaft is convex in shape, and the lateral tubercle of the upper end of the tibia-fibula articulation is a compact structure. The presence of a rounded pit on the inner surface of the lower tibiotarsus is often documented in dromaeosaurids, however, this feature is not verifiable in Adasaurus since the astragalus region is covered with sediments. The posterior top border of the ilium is proportionally more thickened than that of Achillobator, and the anterior border of the anterior blade of the ilium has a similar shape to that of Saurornitholestes. This anterior border has a notched appearance that is characteristic to Adasaurus. As a whole, the top border is straightened in shape. The pubic peduncle—a robust anterior extension that articulates with the pubis—is wide and developed to the bottom. A large supratrochanteric (above the trochanter of the femur) extension is absent on the ilium. Like other dromaeosaurids, the pubis is elongated with an expanded pubic boot (lower end) and features an opisthopubic (backwards directed) condition. The digit II ungual is not hypertrophied (elongated) as in most dromaeosaurids, and though Adasaurus features a similar metatarsal II-III ratio to that of Balaur, this is due to the reduced sickle claw of digit II instead of an elongated ungual of digit I. Metatarsal III of the paratype shows that a tubercle is present on the extensor surface and this tuberosity likely originates the insertion of the muscle tibialis cranialis. The lower tarsals and upper ends of the metatarsals are somewhat fused. Classification Adasaurus is a member of Dromaeosauridae, a group that is closely related to living birds. When erected by Barsbold in 1983, Velociraptorinae was conceived as a group containing Velociraptor and closely related species that were characterized by their smaller size and long-narrow snouts. However, Barsbold did not include Adasaurus in the group, instead, he placed it within the Dromaeosaurinae. It was not until 1998 that this group was defined as a clade by Paul Sereno. Sereno defined the group as all dromaeosaurids more closely related to Velociraptor than to Dromaeosaurus. Kubota and Barsbold in 2006 during their rexamination of Adasaurus found this taxon to be more closely related to Velociraptor than other dromaeosaurids. The traditional view of the Velociraptorinae commonly included Velociraptor, Tsaagan and Linheraptor,