There are no squamosal or quadratojugal horns or bosses on the upper skull corners or the cheeks.
22.
They all possess a distinct row of nodes on the squamosal and parietal areas of the skull roof.
23.
The squamosal is separated from the parietal bone at the rear of the skull by a small indentation.
24.
The squamosal horn, on the top rear corner of the skull, is robust and pyramid-shaped.
25.
This creature had an incipient squamosal-dentary jaw-cranium joint, which is a clearly mammalian anatomical feature.
26.
In " P . rhombolepis ", the squamosal touches the maxilla ( varies among specimens though ).
27.
The squamosal horns, at the rear skull corners, and jugal horns, at the cheeks, are small.
28.
Watson and other palaeontologists noted that tritylodontids lacked the dentary and squamosal jaw articulation that was characteristic of early mammals.
29.
These specimens also seem to have little horns on the rear corners of the head, placed on the squamosal bones.
30.
The juvenile status is confirmed by the short and wide squamosal, a short snout and the epinasal not being fused.
