Figure 3. Medial view of the quadrate of Tyrannosaurus rex (cast at the ANSP) with B,drawings made by Erwin Christman and identified by Welles and Long (1974) as the astragulus. 1-pterygoid process of the quadrate. 2-quadrate foramen. 3-occipital condyle. 4-paroccipital process. 5-basisphenoid. 6-prearticular. 7-articular. 8- quadratojugal. 9-articulating surface for the squamosal. Scale below the articular in A = 2 cm.
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