There is an outstanding Cretaceous fossil record of nonneornithine birds from China and Mongolia (Chiappe 2007), but very little is still known about Paleogene Neornithes from Asia. The Cenozoic avian fossil record, or parts thereof, was summarized by Kurochkin (1976), Rich et al. (1986; China, Japan, and Southeast Asia), Nessov (1992; area of the former Soviet Union), and Hou (2003; China). Most of the published pre-Oligocene taxa stem from late Eocene and Oligocene sites of Mongolia, Kazakhstan, and China. Avian remains were also described from the Vastan Lignite Mine, a promising early Eocene (about 52 Ma) locality in India (Mayr et al. 2007).
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