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 lacrimal of Tsaagan is similar to that of Velociraptor in possessing an enlarged lacrimal pneumatic fenestra that sits at the posterodorsal edge of the antorbital fossa that is preceded anteriorly by a concave portion of bone bearing additional pneumatic foramina ( Fig. 3A–B ). However, there are fewer pneumatic foramina anterior to the lacrimal pneumatic fenestra in Tsaagan than in Velociraptor .

Figures

Figure 3. Craniofacial pneumaticity of Tsaagan. Skull (cast of IGM 100/1015) in (A, C) lateral and (B, D) medial views. Abbreviations: aofen, antorbital fenestra; aof, antorbital fossa; pneu fen, additional maxillary pneumatic fenestra; mf, maxillary fenestra; mx, maxilla; pmf, promaxillary fenestra; pmx, premaxilla. In (B), green is the additional maxillary pneumatic fenestra, blue is the maxillary fenestra, and yellow is the promaxillary fenestra.