. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Figure 4. Therioherpeton cargnini. Right lateral view of the incomplete skull and jaw of the holotype. Note the slender zygomatic section of the jugal, and the incipiently bifurcated root of Pc^ tromedial surfaces of the neural pedicles that contribute to the floor of the neural canal. The number of dorsal vertebrae is uncertain because of a gap between the fifteenth dorsal and the next group of ver- tebrae. The zygapophyses of the last dorsal vertebrae are anteroposteriorly robust and oriented almost horizontally, wi
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Figure 4. Therioherpeton cargnini. Right lateral view of the incomplete skull and jaw of the holotype. Note the slender zygomatic section of the jugal, and the incipiently bifurcated root of Pc^ tromedial surfaces of the neural pedicles that contribute to the floor of the neural canal. The number of dorsal vertebrae is uncertain because of a gap between the fifteenth dorsal and the next group of ver- tebrae. The zygapophyses of the last dorsal vertebrae are anteroposteriorly robust and oriented almost horizontally, with little in- clination toward the median plane. The vertebrae forming the sacrum are difficult to discern individually, although one bears fragments of sacral ribs. We infer that there might be three or possibly four sa- cral vertebrae. All are rather robust, and the neural canals are as wide as the centra. Subcylindrical fragments (and many molds) preserve 15 incomplete ribs on the right side and 17 on the left side (Figs. 5A, 6). There is no evidence of overlapping uncinate processes as are known in many cynodonts. Cervical ribs, which are short, thick, and posteriorly deflected, articulate behind the anterior margins of the centra, not between adjacent centra as in Thri- naxodon liorhinus (Jenkins, 1971). The dorsal ribs, which in cross section are fig- ure 8-shaped, exliibit no clear indication of a lumbar region, except that the poste- rior dorsal ribs gradually decrease in length. The pectoral girdle is represented only by the blade of the right scapula (not fully prepared at present). The anterior and posterior borders of the blade project lat- erally, forming a deep sulcus for musculus supracoracoideus, similar to the condition in Thrinaxodon liorhinus (Jenkins, 1971). The distal half of the right humerus is pre- served, and appears to be relatively prim- itive by virtue of its great distal width and the presence of an ectepicondylar fora- men. The Pright radius and ul
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