. A diapsid reptile from the Pennsylvanian of Kansas. Reptiles, Fossil -- Kansas; Paleontology -- Pennsylvanian; Paleontology -- Kansas. 1980 PENNSYLVANIAN DIAPSID REPTILE 33. Fig. 15.—Petrolacosaunis kansensis Lane. Dorsal, sacral and caudal vertebrae with some associated ribs, all X (A-C) Lateral view of vertebrae 7, 8, 13 and 14, KUVP 9951. (D) Lateral view of vertebrae 17 and 18, KUVP 9951. (E) Lateral view of vertebrae 25 and 26, KUVP 33606b. (F) Dorsal and lateral views of first sacral neural arch and ribs, KUVP 33605. (G) Partially preser\'ed second sacral vertebra and rib in anter
. A diapsid reptile from the Pennsylvanian of Kansas. Reptiles, Fossil -- Kansas; Paleontology -- Pennsylvanian; Paleontology -- Kansas. 1980 PENNSYLVANIAN DIAPSID REPTILE 33. Fig. 15.—Petrolacosaunis kansensis Lane. Dorsal, sacral and caudal vertebrae with some associated ribs, all X (A-C) Lateral view of vertebrae 7, 8, 13 and 14, KUVP 9951. (D) Lateral view of vertebrae 17 and 18, KUVP 9951. (E) Lateral view of vertebrae 25 and 26, KUVP 33606b. (F) Dorsal and lateral views of first sacral neural arch and ribs, KUVP 33605. (G) Partially preser\'ed second sacral vertebra and rib in anterior view, KUVP 33606b. (H-I) Lateral and anterior views of anterior caudal vertebrae and associated ribs, KUVP 33606c. Dorsal Vertebrae Dorsal vertebrae (Fig. 15) are consider- ably shorter than the cervical vertebrae. The centra in KUVP 9951 decrease gradually in length from 9 mm in anterior dorsal verte- brae, to 8 mm in typical mid-dorsals and down to 7 mm in posterior dorsals. The centra in the dorsal vertebrae are stoutly built, with a length to posterior height ratio of :1 in vertebra 14, in contrast to the condition in the cervical region where the ratio is :1 (vertebra 3). The absolute iieight of the centra increases slightly in the dorsal region, and there is bevelling of the ventral surface anteriorly and especially pos- teriorly to accommodate the intercentra. In- terccntral gaps are, therefore, small. Between the anterior and posterior ends of the centrum the lateral surface is strongly concave when viewed in cross-section. The keel, seen in cervical vertebrae, is retained in dorsal verte- brae, but the ventral border of the keel is. 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 Reisz, Robert. Lawrence : University of Kansas
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Keywords: ., bookcentury1900, bookcollectionbi, booksubjectpaleontologykansas
