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''Gephyrosaurus'' is a genus of early Rhynchocephalia first described and named in 1980 by Susan E. Evans.〔 Evans, S.E. 1980. The skull of a new eosuchian reptile from the Lower Jurassic of South Wales. Zoological Journal of the Linnean Society 70: 203–264.〕 They are distantly related to the extant ''Sphenodon'' (tuatara of New Zealand) with which they shared a number of skeletal features including a large tooth row along the side of the palatine bone (part of the palate) and posterior process of the dentary bone (part of the lower jaw). They lived during Early Jurassic in Wales, UK. 〔 〔Evans, S.E. 1981. Caudal autonomy in a lower Jurassic Eosuchian. Copeia 1981: 883-884.〕 〔 〔Evans, S.E. 1985. Tooth replacement in the Lower Jurassic lepidosaur ''Gephyrosaurus bridensis''. Neues Jahrbuch fuir Geologie und Paliontologie, Monatshefte 7:411-420.〕 〔Evans, S.E. 2003. At the feet of the dinosaurs: the early history and radiation of lizards. Biological Reviews, 78:513-551. 〕 〔Jones, M.E.H. 2008. Skull shape and feeding strategy in ''Sphenodon'' and other Rhynchocephalia (Diapsida: Lepidosauria). Journal of Morphology 269: 945–966. 〕 〔Gill, P.G., Säilä, L.K., Corfe, I.J., Challands, T.J., Williams, M., Clemens, W.A. 2006. The fauna and palaeoenvironment of St. Brides Island: Evidence from the lower Jurassic fissure fills of South Wales. In Ninth international symposium on Mesozoic terrestrial ecosystems and biota. (ed. P. M. Barrett & S. E. Evans), pp 48−51. London: Natural History Museum.〕 〔Jones, M.E.H. 2009. Dentary tooth shape in ''Sphenodon' and its fossil relatives (Diapsida: Lepidosauria: Rhynchocephalia). In Koppe, T., Meyer, G., Alt, K.W., eds. Interdisciplinary Dental Morphology, Frontiers of Oral Biology (vol 13). Griefswald, Germany; Karger. 9–15.〕〔http://paleobackup.nceas.ucsb.edu:8090/cgi-bin/bridge.pl〕 The primitive cranial features of this organism places it within the order of Eosuchia. ==Anatomical Description== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Gephyrosaurus」の詳細全文を読む スポンサード リンク
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