Fig 15. Pseudotherium argentinus, ventral view showing notches in temporal process of squamosal.
The quadrate notch (medial) and the quadratojugal notch (lateral) are divided by a hook-shaped squamosal septum. A squamosal notch is present within the quadratojugal notch and abuts the anterior process of the bifurcated paroccipital process. The squamosal notch does not completely cover the lateral face of the anterior paroccipital process. Abbreviations: app, anterior paroccipital process; qn, quadratojugal notch; qjn, quadratojugal notch; sn, squamosal notch; ss, squamosal septum.