Tsaagan mangas

Brownstein, Chase Doran, 2021, Dromaeosaurid crania demonstrate the progressive loss of facial pneumaticity in coelurosaurian dinosaurs, Zoological Journal of the Linnean Society 191 (1), pp. 87-112 : 95

Tsaagan mangas

The pneumatization of the jugal in Tsaagan is far less than in Velociraptor , although the jugal foramen/recess ( Witmer, 1997; Norell et al., 2006) is identifiable ( Fig. 4D ). As in Deinonychus , the majority of the bone surface of the jugal in Tsaagan is smooth. Notably, the holotype of Linheraptor , which may in fact represent another specimen of Tsaagan ( Turner et al., 2012; Evans et al., 2013) possesses numerous well-developed foramina across its jugal (e.g. Xu et al., 2015) CT scanning performed by Norell et al. (2006) demonstrated the absence of any internal pneumatization of the jugal in Tsaagan .

Figures

Figure 4. Reconstruction of the antorbital sinus in coelurosaurs. The second sentence in the figure caption should read: Skulls of (A) Velociraptor, (B) Tsaagan, (C) Tyrannosaurus, (D) Deinonychus, (E) Saurornithoides, and (F) Khaan. Antorbital sinus in blue, with location of the maxillary fenestra in black and promaxillary fenestra in yellow. Photo of Deinonychus courtesy of the Division of Vertebrate Paleontology, Peabody Museum of Natural History.