. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. ESTKS : THRINAXODON LIORHINUS 171 In addition, a tiny foramen is present on the opisthotic about midway between the posterior borders of the jugular foramen and the fenestra oval is. ()tic Region The otic region is shown in detail in Figure 3B. Several addi- tions may be made to Parrington's account of the fenestra oralis region of Thrinaxodon. Of particular interest is the fact that he describes the fenestra oralis as confluent with the "unossified region" (to be discussed below), which for the juveniles in
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. ESTKS : THRINAXODON LIORHINUS 171 In addition, a tiny foramen is present on the opisthotic about midway between the posterior borders of the jugular foramen and the fenestra oval is. ()tic Region The otic region is shown in detail in Figure 3B. Several addi- tions may be made to Parrington's account of the fenestra oralis region of Thrinaxodon. Of particular interest is the fact that he describes the fenestra oralis as confluent with the "unossified region" (to be discussed below), which for the juveniles in- cludes an area separating basioccipital from basisphenoid and prootic, except for a tiny contact with the latter at the anterior border of the cochlear recess (see below) in both adult and. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum
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