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Buccal soft anatomy in Lesothosaurus



recently published!

KNOLL, F. (2008): Buccal soft anatomy in Lesothosaurus (Dinosauria: Ornithischia). Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen, Volume 248, Number 3, June 2008, 355?364; Stuttgart.

Abstract: The probable buccal soft anatomy of the basal ornithopod Lesothosaurus, from the Early Jurassic of southern Africa, is appraised. A labial emargination does not establish the existence of a malar structure because such a configuration is present in a number of extant lizards, but generally absent in mammals. Judging from the condition in lizards, the pattern of labial foramination is not reliable evidence of the presence of cheeks either. The perioral hard anatomy of Lesothosaurus does not offer any conclusive support for the presence of cheeks or mammalian style lips. Lesothosaurus very probably bore both an upper and a lower horny beak of very limited caudal extent, based on the vascularized and roughened surface texture of the rostral extremities of the jaws.

Key words: Ornithischia, Dinosauria, cheeks, lips, beak, anatomy.

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And in the same issue:

Jun, Chen; Butler, Richard J.; Liyong, Jin. 2008. New material of large-bodied ornithischian dinosaurs, including an iguanodontian ornithopod, from the Quantou Formation (middle Cretaceous: Aptian-Cenomanian) of Jilin Province, northeastern China. Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen, Volume 248, Number 3, June 2008 , pp. 309-314(6)

The Quantou Formation of Jilin Province, Northeast China, has recently yielded an important new middle Cretaceous (Aptian-Cenomanian) fauna of terrestrial vertebrates, including zalambdalestid mammals, basal ornithopod dinosaurs and basal ceratopsian dinosaurs. Here we describe well-preserved but isolated and fragmentary material of large-bodied ornithischian dinosaurs from this formation. An isolated humerus represents an iguanodontian ornithopod dinosaur, expanding the known stratigraphic and geographic range of this group within China. Other material (partial distal tibia, series of three dorsal vertebrae apparently representing part of a fused synsacrum) can only be assigned to Ornithischia indet.

Keywords: ANKYLOSAURIA; CHINA; CRETACEOUS; IGUANODONTIA; ORNITHISCHIA; ORNITHOPODA; QUANTOU FORMATION