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Gigantic caenagnathid oviraptorosaurian from Upper Cretaceous Mongolia

Ben Creisler

A new paper:

Takanobu Tsuihiji, Mahito Watabe, Rinchen Barsbold & Khishigjav
Tsogtbaatar (2015)
A gigantic caenagnathid oviraptorosaurian (Dinosauria: Theropoda) from
the Upper Cretaceous of the Gobi Desert, Mongolia.
Cretaceous Research 56: 60–65


Fused dentaries of a caenagnathid are reported from the Late
Cretaceous of Mongolia.
The size and morphology of the specimen is comparable to those of Gigantoraptor.
The specimen may contribute data for the correlation of the Iren
Dabasu Formation.
Large-bodied caenagnathids were widespread across Asia and North America.


A large, isolated symphyseal region of fused dentaries of an
oviraptorosaurian was found in the Upper Cretaceous Bayn Shire
Formation at Tsagaan Teg in the Mongolian Gobi Desert. A phylogenetic
analysis places this specimen within Caenagnathidae. This specimen is
comparable in size and morphology to the gigantic caenagnathid
Gigantoraptor erlianensis from the Iren Dabasu Formation in China and
is likely closely related to it. The occurrence of the specimen with
possible affinities to G. erlianensis in the Bayn Shire Formation is
consistent with the hypothesized correlation between the Bayn Shire
and Iren Dabasu formations based on the co-occurrences of vertebrate
fossils, especially turtles.