Witmer, L. M., and R. C. Ridgely. 2008. The paranasal air sinuses of ...

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1378 WITMER AND RIDGELY Fig. 7. Paranasal sinuses and other cephalic components of Panoplosaurus mirus (ROM 1215) based on CT scanning followed by segmentation and 3D visualization. Bone is rendered semitransparent (except in A). A: Skull in left lateral view. B: Rostral view. C: Left lateral view. D: Dorsal view. E: Right side of sagittally sectioned head in medial view with soft-tissue components isolated. F: Ventral view. G: Left rostrodorsolateral view. H: Isolated and semitransparent nasal cavity in left rostrodorsolateral view, revealing the course of the nasal airway (arrow). I: Same in left lateral view. Scale bars 5 5cm.
DINOSAUR PARANASAL AIR SINUSES 1379 Figure 7. (continued) at the nostril, the airway ascends directly caudodorsally adjacent to the median septum. It then begins the rostral loop, turning laterally and then rostroventromedially, completing the loop directly below the ascending tract. The airway then ascends again, passing caudodorsolaterally, after which it makes the second loop, arcing caudoventromedially to the choana. This unexpected pattern of complex looping is remarkably symmetrical,
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Witmer, L. M., and R. C. Ridgely. 2008. The paranasal air sinuses of ...

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