New Information on the Cranial Anatomy of Acrocanthosaurus atokensis and Its Implications for the Phylogeny of Allosauroidea (Dinosauria: Theropoda)
Figure 10
Left quadratojugal and quadrate of Acrocanthosaurus atokensis (NCSM 14345).
Quadratojugal and quadrate in (A) lateral, (B) posterior, and (C) medial views. Hatched lines represent missing material. j, jugal contact; lc, lateral condyle of quadrate; ltf, lateral temporal fenestra; mc, medial condyle of quadrate; mpr, medial pneumatic recess of quadrate; ppr, posterior pneumatic recess of quadrate; pt, pterygoid contact; Q, quadrate; qc, quadrate cotylus; QJ, quadratojugal; quf, quadrate foramen; sq, squamosal contact.