デイル・ラッセル
Slowly the precise relationship between the finds became clear. In 1960 Alexander Wetmore concluded that "Caenagnathus" was not a bird but an ornithomimid. In 1969 Edwin Colbert and Dale Russell suggested that "Chirostenotes" and "Macrophalangia" were one and the same animal. In 1976 Halszka Osmólska described "Caenagnathus" as an oviraptorosaurian. In 1981 the announcement of "Elmisaurus", an Asian form of which both hand and feet had been preserved, showed the soundness of Colbert and Russell's conjecture.