Boyer diss 2009 1046..

Figure 3.5. Cranium of Plesiadapis cookei (UM 87990). A, stereophotographic ventral
view. B, HRxCT ventral view reconstruction shown without parallax. C, inset of left
glenoid and bulla. C’, enlargement of inset C. Fine dashed lines represent sutures and
solid lines indicate major discontinuities on the specimen’s surface. Numbers and
abbreviations: 1 – premaxilla/nasal suture, 2 – premaxilla/maxillary suture, 7 –
maxilla/palatine suture at level of M 1 in palate, 8 – notch between pterygoid process of
palatine and M 3 alveolus marking lesser palatine nerve route, 9 – maxilla/palatine suture
at level of M 3 in palate, 10 – dorsal communication of M 3 alveolus with orbital cavity, 11
– infraorbital foramen, 12 – zygomatic/maxillary suture, 13 – edge of orbital excavation
on zygomatic bone, 14 – expansion of ventral surface of zygomatic for masseter
attachment, 19 – endocranial surface of frontal, depressions for olfactory bulbs, 20 –
frontal/parietal suture on endocranial surface, 21 – base of left pterygoid process of
palatine, 22 – postpalatine torus, 23 – postpalatine spine, 27 – glenoid fossa, 28 –
postglenoid process, 29 – postglenoid foramen, 30 – entoglenoid process, 31 –
basisphenoid entopterygoid process, 32 – alisphenoid ectopterygoid process, 35 – pars
cochlearis of petrosal, 36 – pars canalicularis of petrosal, 37 – tympanic processes of
auditory bulla, 38 – digastric fossa, stylomastoid foramen area (?), 39 – paroccipital
process (mastoid process) of petrosal, 40 – tubular external auditory meatus, 43 – sagittal
ridge of bone on basioccipital, 44 – occipital condyles, 45 – hypoglossal foramen, 46 –
jugular foramen, 47 – jugular processes, 49 – sagittal contact between right and left
exoccipitals; Boc – basioccipital; Bul – auditory bulla, Eoc – Exoccipital; Fr – frontal;
Mx – maxilla; Ns – nasal; Pa – parietal; Sq – squamosal; Zy – zygomatic.
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