Boyer diss 2009 1046..

Figure 3.10. Cranium of Plesiadapis cookei (UM 87990). A, stereophotographic posterior
view. B, HRxCT posterior view reconstruction shown without parallax. C, close-up of
posterior view. Dashed lines represent sutures, hatched areas represent broken surfaces,
and area in solid gray represents former site of supraoccipital bone. Numbers and
abbreviations: 24 – sagittal crest, 25 – nuchal crest, 39 – paroccipital process (mastoid
process) of petrosal, 40 – tubular external auditory meatus, 44 – occipital condyle, 47 –
jugular process, 48 – foramen magnum, 49 – sagittal contact between right and left
exoccipitals; 50 – sutural contact between remnants of supraoccipital and exoccipital; 51
– wedge-shaped depression on exoccipitals, where supraoccipital is lost; Boc –
basioccipital; Eoc – exoccipital; Pa – parietal; Soc – supraoccipital.
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