Machairasaurus whole refers to the sabre-like claws of the hand. The holotype, IVPP V15979, was found in layers of the Bayan Mandahu dating from the late Campanian. It mainly consists of a left frontlimb, including the lower end of the lower arm, two carpal bones and a complete hand. Also some fragmentary foot elements were present. The other find is the paratype, IVPP V15980, consisting of a very fragmentary skeleton including tail vertebrae, chevrons, ribs, phalanges of the hands, fragments of the second and fourth metatarsals and pedal phalanges. Five oviraptorid specimens associated with a nest, the female having been found
Altun Ha is, is dated to about 600−650, which is at the beginning of the Late Classic period. The tomb is the seventh and earliest in B-4, which made the excavators designate this burial Tomb B-4/7. Tomb B-4/7 contained the skeleton of an adult male with many offerings. The body was fully extended dorsally with the skull facing south-southwest. The person had a height of 170–171 cm, with the recovered skeletal materials consisting of a fragment of the skull, the mandible, long bones, five teeth, two vertebrae, five carpal bones, the patellas, and miscellaneous metacarpals, metatarsals, and phalanges. The bulk of the