Tsaagan mangas

Norell, Mark A., Clark, James M., Turner, Alan H., Makovicky, Peter J., Barsbold, Rinchen & Rowe, Timothy, 2006, A New Dromaeosaurid Theropod from Ukhaa Tolgod (Ömnögov, Mongolia), American Museum Novitates 3545 (1), pp. 1-51 : 2

Tsaagan mangas , new taxon

TYPE SPECIMEN: IGM 100 /1015, a skull and mandible and anterior eight cervicals ( fig. 1 ) .

TYPE LOCALITY: Xanadu sublocality, Ukhaa Tolgod, Ömnögov Aimag, Mongolia ( fig. 2 ) .

FORMATION: Djadokhta Formation, Campanian (Dingus et al. in review).

ETYMOLOGY: Tsaagan, Mongolian for white; mangas, Mongolian for monster.

DIAGNOSIS: Referred to the Dromaeosauridae on the basis of the following derived characters: caudolateral overhanging shelf of the squamosal, large spike on medial inflected process of the articular, and large quadrate foramen ( Currie, 1995; Norell and Makovicky, 2004). Differs from all other known dromaeosaurids in the following unique derived characters: paroccipital process pendulous and not twisted distally, basipterygoid process elongate and anteroventrally directed, maxillary fenestra large and located at the anterior edge of the antorbital fossa, jugal meets the squamosal to exclude the postorbital from the margin of the infratemporal fenestra.

Figures

Fig. 1. Holotype of Tsaagan mangas (IGM 100/1015) during initial preparation.

Fig. 2. View of Xanadu locality showing the location of holotype of Tsaagan mangas (IGM 100/1015). This view is looking toward the southeast.