Fig. 2 in On the affinities of Tetraceratops insignis, an Early Permian synapsid

Fig. 2. Drawing of the synapsid Tetraceratops insignis Matthew, 1908, holotype (Clear Fork Group: Leonardian, Texas). AMNH 4526 (modified from Laurin and Reisz 1996). Left lateral (A), palatal (B), and right lateral (C) views. The black arrow indicates the suture between braincase and dermal skull. The quadrate is colored in green, epipterygoid in blue, upper postcanines in orange, upper margin of the temporal fenestra in purple, quadrate process of the pterygoid in yellow, and interpterygoid vacuity in brown.