New Information on the Cranial Anatomy of Acrocanthosaurus atokensis and Its Implications for the Phylogeny of Allosauroidea (Dinosauria: Theropoda)
Figure 36
Illustration of characters 19, 25, and 26 (Appendix S1).
Left rostra of (A) Sinraptor dongi (figure modified from [16]) and (B) Acrocanthosaurus atokensis (NCSM 14345). aof, antorbital fenestra; en, external naris; mf, maxillary fenestra; nf, narial fossa; nmp, naso-maxillary process; nr, nasal recesses; pmf, promaxillary fenestra.