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Tyrannosaurid dentary from Kazakhstan



From: Ben Creisler
bcreisler@gmail.com

A new paper in the Russian publication Proceedings of the Zoological
Institute  RAS. The pdf is free.

http://www.zin.ru/journals/trudyzin/eng/contents.html#

A.O. Averianov, H.-D. Sues and P.A. Tleuberdina (2012)
The forgotten dinosaurs of Zhetysu (Eastern Kazakhstan; Late Cretaceous).
Proceedings of the Zoological Institute  RAS 316 (2): 139-147
http://www.zin.ru/journals/trudyzin/doc/vol_316_2/TZ_316_2_Averianov.pdf



The Late Cretaceous dinosaur-bearing localities discovered in the Ili
River Basin in the foothills of Dzhungar Alatau, in the center of the
historical region Zhetysu (Semirechie), in 1925–1927 are among the
first occurrences for dinosaurs discovered in Asia. Preliminary
identifications of dinosaurian remains from the Zhetysu localities,
reviewed by Nesov (1995a), included Sauropoda, Tyrannosauridae,
Hadrosauridae, Ankylosauridae, and possible Ceratopsidae. The only
previously described specimen from this assemblage is a tibia
attributed to cf. Ceratopsia by Riabinin (1939) from the Kara-Cheku
locality. This bone is considered currently as Dinosauria indet. We
describe here the most important find from this fauna to date, a
partial tyrannosaurid dentary collected by a team from the Institute
of Zoology of the Kazakh Academy of Sciences at the Kara-Cheku
locality in 1950. This specimen can be confidently identified as a
derived tyrannosaurine based on the incrassate teeth and the small
first alveolus. This is the first record of a tyrannosaurine from the
Late Cretaceous of Kazakhstan and Middle Asia. The age of Zhetysu
dinosaur fauna is possibly Campanian or Maastrichtian.