Boyer diss 2009 1046..

frontal have been pushed laterally and ventrally into the orbit, shearing and crushing the
lacrimals in consequence. On the left side, a small segment of the lacrimal, as well as the
frontal and zygomatic sutures, are visible within the orbit (Figs. 3.1: 4, 5; Fig. 3.4: 4).
These visible bits of suture at least allow confident conclusion that the facial process of
the lacrimal was not very anteriorly extensive.
Maxilla and maxillary dentition.— The right and left maxillae are preserved with
P 4 , M 1-2 on both sides, P 3 on the right side, and both sets of alveoli for M 3 (Figs. 3.1, 3-7).
This specimen is the first to demonstrate the lack of the upper canine and P 2 in P. cookei.
The teeth are well-preserved with almost no wear, as expected for a young individual
(Figs. 3.3-5). The anterior margin for contact with the premaxilla is preserved; thus the
measured length of the diastema between I 2 and P 3 of roughly 14 mm can be stated with
confidence. The rostral parts of the maxillae, as well as their zygomatic, palatal and
alveolar processes are well-preserved (Figs. 3.1-3). The orbital part is crushed (Fig. 3.4).
Thus, the contributions of the maxillae to the orbital mosaics are poorly delimited (Fig.
3.4). Frontal contact occurs in an interval between the nasal (or premaxilla?) and
lacrimal on the dorsum of the skull, measuring 8.9 mm on the left side (Fig. 3.1: 6).
Palatine contact of the maxilla occurred on the palate at the level of M 1 via a
slightly convoluted suture (Fig. 3.5: 7). The palatal part of the maxilla was measured
from its contact with the palatine at the M 1 level to the most anterior point. The overall
length of the maxilla in the palate is thus 30.2 mm. In ventral view, on the left side, a
notch can be seen separating the M 3 alveolar process from the pterygoid process of the
palatine (Fig. 3.5: 8). The palatine/maxilla contact continues from its apex, medial to M 1 ,
to run posteriorly through the lateral side of this notch, which held the lesser palatine
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