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Hadrosaurs from Tajikistan [Troodon isfarensis a hadrosaur]



From: Ben Creisler
bcreisler@gmail.com

A new paper in Paleontological Journal:

A. O. Averianov and V. R. Alifanov (2012)
New data on duck-billed dinosaurs (Ornithischia, Hadrosauridae) from
the Upper Cretaceous of Tajikistan.
PALEONTOLOGICAL JOURNAL 46(5): 512-519
DOI: 10.1134/S0031030112050036
http://www.springerlink.com/content/j35700142121hh46/

Duck-billed dinosaur remains (Hadrosauridae) from the Yalovach
Formation (Lower Santonian) of the Isfara 2 and Kansai localities
(northern Tajikistan) are described. Most of them belong to a
flat-headed hadrosaurid which is distinguished from all other
representatives of the family by the absence on the frontals of a
facet for the nasals. In this feature, the Tajikistan hadrosaurid is
similar to Bactrosaurus johnsoni from the Iren Dabasu Formation of
China, which shows the minimum contact of the frontals and nasals; and
in the wide prefrontal, it resembles Aralosaurus tuberiferus from the
Bostobinskaya Formation in Kazakhstan. The theropod Troodon isfarensis
Nessov, 1995 from Isfara 2 is described based on a hadrosaurid
prefrontal.