. Bulletin of the British Museum (Natural History). 306 D. S. BROWN temporal musculature. Unlike any piesiosaur described previously there is no development of a sagittal crest; instead, the temporal fossae are separated by at least I cm of irregularly- pitted dorsal surface, the edges of which actually overhang the excavations. In lateral view the dorsal outline of the skull is approximately linear, the parietals continuing the lines of the frontals, whereas in other plesiosaurs the sagittal crest is elevated well above this line. Behind the smooth ventral surfaces of the lateral flanges the
. Bulletin of the British Museum (Natural History). 306 D. S. BROWN temporal musculature. Unlike any piesiosaur described previously there is no development of a sagittal crest; instead, the temporal fossae are separated by at least I cm of irregularly- pitted dorsal surface, the edges of which actually overhang the excavations. In lateral view the dorsal outline of the skull is approximately linear, the parietals continuing the lines of the frontals, whereas in other plesiosaurs the sagittal crest is elevated well above this line. Behind the smooth ventral surfaces of the lateral flanges the roof of the braincase is divided into three distinct areas (Fig. 32). In the ventral midline is a groove which widens and deepens into a roughened pit halfway along its length. The groove is surrounded by a smooth cartilage-covered area which in turn is bordered laterally by areas of roughened bone which curved ventrally to form part of the braincase walls and unite with the prootics. The posterior part of the smooth area is inclined posteroventrally at a slight angle and forms two facets, divided by a groove, for union with the supraoccipital. With the latter element in place, the groove would form a median channel leading from the occipital surface to the pit; 3cm. I Fig. 31 Kimmerosaunis langhami gen. et sp. nov. , skull roof in dorsal view. F, frontal; P, parietal; PF. postfrontal; PO, postorbital; SQ, 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 British Museum (Natural History). London : BM(NH)
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