. Athlon : essays on palaeontology in honour of Loris Shano Russell. Paleontology. Fig. 7 Heleosaurus scholtzi, X 6. a. Anterior view of 3rd and posterior view of 6th rib. b. Dorsal and lateral views of dermal scales. the area of the 14th, and then diminishes gradually toward the rear. None behind the 22nd is preserved. This rib is approximately one and one-half times the length of a centrum. GIRDLES AND FEMUR The shoulder girdle is preserved in more or less its original three-dimensional configuration, although ventrally it lies directly on the vertebral column. The general appearance resembl
. Athlon : essays on palaeontology in honour of Loris Shano Russell. Paleontology. Fig. 7 Heleosaurus scholtzi, X 6. a. Anterior view of 3rd and posterior view of 6th rib. b. Dorsal and lateral views of dermal scales. the area of the 14th, and then diminishes gradually toward the rear. None behind the 22nd is preserved. This rib is approximately one and one-half times the length of a centrum. GIRDLES AND FEMUR The shoulder girdle is preserved in more or less its original three-dimensional configuration, although ventrally it lies directly on the vertebral column. The general appearance resembles more that of captorhinomorphs than archosaurs other than Proterosuchus. The cleithrum was not observed, and may well not have been present. The clavicles are not completely exposed, but they are of the heavy build commonly seen in more primitive reptiles, and again as in Proterosuchus. The preserved portion of the stem reaches nearly to the top of scapula. A posterior flange extends from the lower part of the stem and continues onto the broad ventral plate. The interclavicle has the usual T-shape common to primitive rep- tiles. The anterior plate is poorly exposed, but apparently the anterior margin slopes sharply dorsally, as in early lepidosaurs and archosaurs. The stem is narrow and extends the length of five centra. The distal end is divided as in some romeriids and pelycosaurs. The scapulocoracoid is ossified as a single unit. The blade is very short relative to the anterior-posterior extent of the coracoid area. A large subscapular fossa lies on the inner surface. The dorsal surface of the blade is thickened and rugose, sug- gesting continuation in cartilage. The posterior margin of the bone is thickened and well defined, but anteriorly the bone thins and its extent is difficult to ascertain. The scapulocoracoid resembles that of captorhinomorphs except for the anterior. Please note that these images are extracted from scanned page images that may have been digitally e
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