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Witmer, L. M., R. C. Ridgely, D. L. Dufeau, and M. C.

Witmer, L. M., R. C. Ridgely, D. L. Dufeau, and M. C.

Witmer, L. M., R. C. Ridgely, D. L. Dufeau, and M. C.

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Fig. 6.6. Pneumatic sinuses of the braincase region of, (A–B), an Australian freshwater crocodile, Crocodylus johnstoni<br />

(OUVC 10425), <strong>and</strong> (C–D), a great horned owl, Bubo virginianus (OUVC 10220), viewed surrounding a semitransparent<br />

cranial endocast, derived from surface renderings of CT scan data. Thumbnail views of the whole skull are provided<br />

above the main image (except B, where it is below) to show the orientation of the main image. (A) C. johnstoni in left<br />

caudodorsolateral view. (B) C. johnstoni in left lateral view. (C) B. virginianus in left lateral view. (D) B. virginianus in<br />

left caudoventrolateral view. Scale bars equal 1 cm.

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