They had anteriorly placed neural arches, expanded distal blades, irregularly shaped coracoids, and ventral triangular projections on the anterior ramus of their quadratojugal bones.
22.
Diagnostic features of ankylosaurines include the nuchal shelf that obscures the occiput in dorsal view, and the quadrate condyle which is obscured lightly by the quadratojugal boss.
23.
A depression on the top of the epijugal forms a contact facet with the jugal; a depression at its inner side forms a separate facet contacting the quadratojugal.
24.
When compared with " Anodontosaurus " and " Scolosaurus ", " Euoplocephalus " lacks round osteoderms at the base of the squamosal and quadratojugal horns.
25.
The quadratojugal, a bone within a depression of the skull behind the eye called the laterotemporal fenestra, extends up to the rim of the fenestra or ends just below it.
26.
Unlike in either " Odontopteryx " or " Osteodontornis ", the quadrate of " P . longirostris " had a socket for the quadratojugal that was displaced dorsally.
27.
It has a primitive pelvis and shoulder, and primitive skull details in the quadratojugal, squamosal, quadrate, jugal, and mandibular fenestra ( in the cheek, jaw, and jaw joint ).
28.
Further distinguishing features of eusauropods include the absence of the contact between the squamosal and the quadratojugal, the absence of the anterior process of the prefrontal, and a distally elongated anterior ramus of the quadratojugal.
29.
Further distinguishing features of eusauropods include the absence of the contact between the squamosal and the quadratojugal, the absence of the anterior process of the prefrontal, and a distally elongated anterior ramus of the quadratojugal.
30.
The specimens found have important Mixosaurid characteristics such as a long sagittal crest along the top of the skull but is seen as a different species because there is no external contact between the jugal and the quadratojugal.
