Boyer diss 2009 1046..

Boyer diss 2009 1046.. Boyer diss 2009 1046..

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Figure 3.2. Right premaxilla of Plesiadapis cookei (UM 87990) in A, dorsal (anterior to top); B, lateral (anterior to right); C, medial (anterior to left); and D, anterior views (dorsal to top) with corresponding labeled or enlarged photographs at bottom. Hatching indicates broken surfaces. Dashed lines encircle sutural surfaces. Numbers and abbreviations: 1– premaxilla/nasal suture, 2 – premaxilla/maxillary suture, 3 – premaxillary symphysis; NsA – Nasal aperture. 222

Figure 3.3. Right maxillary teeth (P 3 -M 2 ) of Plesiadapis cookei (UM 87990) in stereophotographic occlusal view. Note absence of P 2 , lack of paraconule on P 3,4 , and dilambdodont morphology of molars sporting mesostyles. These features form a diagnostic suite for Plesiadapis cookei. Numbers and abbreviations: 10 – dorsal communication of M 3 alveolus with orbital cavity, 11 – infraorbital foramen; Mx – maxilla; Pal – palatine. 223

Figure 3.2. Right premaxilla of Plesiadapis cookei (UM 87990) in A, dorsal (anterior to<br />

top); B, lateral (anterior to right); C, medial (anterior to left); and D, anterior views<br />

(dorsal to top) with corresponding labeled or enlarged photographs at bottom. Hatching<br />

indicates broken surfaces. Dashed lines encircle sutural surfaces. Numbers and<br />

abbreviations: 1– premaxilla/nasal suture, 2 – premaxilla/maxillary suture, 3 –<br />

premaxillary symphysis; NsA – Nasal aperture.<br />

222

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