Boyer diss 2009 1046..

existence and/or nature of contacts with the palatine, orbitosphenoid, alisphenoid, and
parietal difficult to assess. The only dimension that can be meaningfully measured is the
anteroposterior length of this element: along the metopic suture, the frontal measures
11.23 mm (Fig. 2.1: 12). The anteriormost region of parietal contact is visible where the
parietal on-lapped the frontal and left an impression (Fig. 2.1: 13). The right frontal is
well-enough preserved to exhibit a distinct ridge that runs from the anterolateral part of
the bone, where it contacts the lacrimal, medially towards the metopic suture, meeting
this suture at the posterior end of the bone, where it contacts the parietal (Fig. 2.1: 14).
This ridge, with its mirror on the opposite side, would have formed a distinct frontal
“trigon.” There is no sign of postorbital processes on these bones. HRxCT data reveal
the frontal as a thin plate of bone anteriorly, and it shows that the bone thickens
posteriorly and is densely trabeculated. No diploic cavities are identifiable. No ethmoid
foramina are preserved.
Palatine.—The palatines are completely obscured and crushed, such that not even
examination of HRxCT data illuminates their morphology.
Parietal.—The parietals are only slightly better preserved than the palatines,
represented as a flat piece of bone visible on the ventral side of the skull (Fig. 2.2). Some
discernable details of its sutural relationships to the frontal were described above.
Squamosal.—The right zygomatic process of the squamosal is preserved (Figs.
2.1, 2: 15). The glenoid fossa is intact as well (Figs. 2.1, 2: 16), although it is mainly
obscured by other bone and matrix. The neurocranial portion of the squamosal is not
recognizably preserved. No sutural contacts are preserved. The HRxCT image of the
glenoid fossa and zygomatic process was digitally extracted (Fig. 2.2D, E). This image
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