 Osmólska and Roniewicz diagnosed Deinocheiridae, based on the only genus of the time in the family, "Deinocheirus".Their diagnosis was "Gigantic carnivorous dinosaurs with long, slender scapula and long fore limbs; manus with three, uniformly developed fingers, ending in strong, large claws".Based on "Deinocheirus" again, the temporal range and distribution for the family was found limited to the Upper Cretaceous of the Upper Nemegt Formation of the Gobi Desert, Mongolia.