. Breviora. 1971 NEW VENEZUELAN FOSSIL PELOMEDUSID slightly. There is no indentation at the midline of the anterior margin. The eight pairs of pleurals meet in the midline. As in all pelomedusids, there are eleven pairs of peripherals. The pygal is trapezoidal and the suprapygal is roughly subtriangular. But- tresses of the axial and inguinal notches are attached to the under- sides of the first and fifth pleurals respectively. The iliac scars of the pelvis are situated on the visceral surfaces of the seventh and eighth pair of pleurals. Of the three elements of the plastron, the bridge is the
. Breviora. 1971 NEW VENEZUELAN FOSSIL PELOMEDUSID slightly. There is no indentation at the midline of the anterior margin. The eight pairs of pleurals meet in the midline. As in all pelomedusids, there are eleven pairs of peripherals. The pygal is trapezoidal and the suprapygal is roughly subtriangular. But- tresses of the axial and inguinal notches are attached to the under- sides of the first and fifth pleurals respectively. The iliac scars of the pelvis are situated on the visceral surfaces of the seventh and eighth pair of pleurals. Of the three elements of the plastron, the bridge is the longest while the anterior lobe is the shortest. The anterior plastral lobe is U-shaped and does not extend beyond the anterior lip of the carapace. The lateral margins of the posterior lobe are straight rather than curved and are inclined medially so that the posterior lobe becomes narrower toward the rear. The entoplastron is diamond-shaped and has a slight U-shaped ridge with the open end facing anteriorly on its visceral surface; this is presumably for the attachment of neck muscles. At the midline junction of the epiplastra there is a pronounced protuberance on the visceral side. The mesoplastra are subrounded to hexagonal elements situated. ^ ^ Figure 3. The shape of the anal notch in three specimens of Podocnemis veneziielensis (from left to right, VF 1177, VF 1173 and VF 1177a). The arrow points toward the anterior end of the shell. The scale represents a length of 10 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. , Museum of Comparative Zoology, Harvard University
Size: 1933px × 1293px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorharvarduniversitymuseumofcomparative, bookcentury1900
