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Caenagnathasia sp. (Oviraptorosauria) from Upper Cretaceous, Nei Mongol, China (free pdf)



Ben Creisler
bcreisler@gmail.com

A paper that's been online for some months but which I somehow missed.
Better late than never...

YAO Xi , WANG Xiao-Li, Corwin SULLIVAN, WANG Shuo, Thomas STIDHAM & XU
Xing (2015)
Caenagnathasia sp. (Theropoda: Oviraptorosauria) from the Iren Dabasu
Formation (Upper Cretaceous: Campanian) of Erenhot, Nei Mongol, China.
Vertebrata PalAsiatica (advance online publication)
http://www.ivpp.cas.cn/cbw/gjzdwxb/pressonline/201502/t20150213_4313557.html

Free pdf:

http://www.ivpp.cas.cn/cbw/gjzdwxb/pressonline/201502/P020150723465206425020.pdf





The oviraptorosaurian theropod Caenagnathasia was first described from
the Late Cretaceous (Turonian) vertebrate assemblage from the Bissekty
Formation of the Kyzylkum Desert, Uzbekistan. Here we report a partial
pair of oviraptorosaurian fused lower jaws, comprising the symphysial
region, from the Upper Cretaceous (Campanian) Iren Dabasu Formation of
Nei Mongol, China. This mandibular fragment can be referred to
Caenagnathasia based on the following shared characters: dentaries
fully fused, symphysial portion of dentary not downturned, anterior
part of dorsal margin of dentary broadly concave in lateral view,
lingual ridge present at margin of occlusal surface on each dentary,
lingual ridge bears apical projection, vascular grooves and associated
foramina do not extend to dorsal surface of symphysis, and anterior
occlusal groove present. This new specimen extends the temporal and
geographic range of Caenagnathasia to the Campanian of China.