Boyer diss 2009 1046..

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

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Figure 2.32 158

Figure 2.32. SBU MRd-12 Sciurus caroliniensis (A-B’, E-F): A, ventral view of left petrosal and ectotympanic bulla. B, ventral view, inset of medial region of bulla. B’, enlargement of inset B. Note appearance of medial process of petrosal projecting beyond ventrally located, broken lamina of ectotympanic. UALVP 49105 Pronothodectes gaoi (C-D’): C, ventral view of left petrosal. D, ventral view, inset of medial tympanic process. D’, enlargement of inset D. Note similarity of broken medial process to that in B’. E, anterior view, surface reconstruction of HRxCT data. F, anterior view of HRxCT slice. Anterior to top in A-D.’ Lateral to left in E and F. Note that ectotympanic and petrosal boundary are clearly visible. Numbers and abbreviations: bs – bullar suture; Bul – auditory bulla; eam – external auditory meatus; Ect – ectotympanic; Ptr – petrosal. 159

Figure 2.32. SBU MRd-12 Sciurus caroliniensis (A-B’, E-F): A, ventral view of left<br />

petrosal and ectotympanic bulla. B, ventral view, inset of medial region of bulla. B’,<br />

enlargement of inset B. Note appearance of medial process of petrosal projecting beyond<br />

ventrally located, broken lamina of ectotympanic. UALVP 49105 Pronothodectes gaoi<br />

(C-D’): C, ventral view of left petrosal. D, ventral view, inset of medial tympanic<br />

process. D’, enlargement of inset D. Note similarity of broken medial process to that in<br />

B’. E, anterior view, surface reconstruction of HRxCT data. F, anterior view of HRxCT<br />

slice. Anterior to top in A-D.’ Lateral to left in E and F. Note that ectotympanic and<br />

petrosal boundary are clearly visible. Numbers and abbreviations: bs – bullar suture; Bul<br />

– auditory bulla; eam – external auditory meatus; Ect – ectotympanic; Ptr – petrosal.<br />

159

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