. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 476 bulletin: museum of comparative zoology thin and moderately expanded antero-posteriorly. Dorsally there is a well-defined suture with the parietal; below this point the anterior and posterior margins are free to stand well out from the level of the braincase wall. PVom the base of the "columella" a well-ossified posterior extension of the epipterygoid runs back above and lateral to the pterygoid in the direction of the quadrate. As preserved, the bone does not quite reach the latter element, but a connec
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 476 bulletin: museum of comparative zoology thin and moderately expanded antero-posteriorly. Dorsally there is a well-defined suture with the parietal; below this point the anterior and posterior margins are free to stand well out from the level of the braincase wall. PVom the base of the "columella" a well-ossified posterior extension of the epipterygoid runs back above and lateral to the pterygoid in the direction of the quadrate. As preserved, the bone does not quite reach the latter element, but a connection may have been present in life. There appears to have been a considerable extension of the epipterygoid over the lateral surface of the pterygoid. Fig. 6. Stahleckeria potens, posterior view of skull, x 1/6 approx. After von Huene. below the "columella", l)Ut the ossification is feeble. However there is a distinct groove on the lateral surface of the pterygoid for the posterior extension of the foot. Anteriorly the foot is broken off as is frequently the case in dicynodont material. The right stapes is present in natural position in our specimen, as well as a fragment of the left. It is very short but stout. The oval footplate is present nearly in proper position covering the fenestra ovalis. Thence the bone runs laterally and expands distally to abut (as preserved) on to the medial margin of the articular region of the quadrate, to touch dorsally the lower edge of the tip of the paroccipital process, and to lie close behind the distal end of the pterygoid. A groove crosses the dorsal surface just lateral to the footplate; there is no evidence of a 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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