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Valdosaurus
''Valdosaurus'' ("Weald Lizard") is a genus of bipedal herbivorous iguanodont ornithopod dinosaur found on the Isle of Wight and elsewhere in England. It lived during the Early Cretaceous.
==Discovery and naming==
In the nineteenth century Reverend William Darwin Fox collected two small thighbones near Cowleaze Chine on the southwest coast of the Isle of Wight. In 1868 he incorrectly suggested these may have come from the same individual that had in 1848 been uncovered for Gideon Mantell as a fossil of ''Iguanodon'', and which in 1869 would be named as the new genus ''Hypsilophodon''. Regardless, both femora, made part of the collection of the British Museum of Natural History as specimens BMNH R184 and BMNH R185, would be commonly referred to the latter genus.
However, in 1975 Peter Galton named them as a new species of ''Dryosaurus'': ''Dryosaurus canaliculatus''. The specific name means "with a small channel" in Latin, referring to a distinct groove between the condyles of the lower thighbone.〔Galton, P.M., 1975, "English hypsilophodontid dinosaurs (Reptilia: Ornithischia)", ''Palaeontology'' 18(4): 741-752〕 In 1977 Galton named a new genus for them: ''Valdosaurus'', the name being derived from Latin ''Valdus'', "Wealden", a reference to the Wealden Group. Its type species, ''D. canaliculatus'', was thus renamed ''V. canaliculatus''.〔Galton, P.M., 1977. "The Upper Jurassic dinosaur ''Dryosaurus'' and a Laurasia-Gondwana connection in the Upper Jurassic", ''Nature'' 268(5617): 230-232〕 A second species, ''V. nigeriensis'', was described by Galton and Philippe Taquet from younger rocks from Niger in 1982;〔Galton, P.M. & P. Taquet, 1982, "''Valdosaurus'', a hypsilophodontid dinosaur from the Lower Cretaceous of Europe and Africa", ''Géobios'' 13: 147-159〕 this has since been transferred to its own genus, ''Elrhazosaurus''.
In 1998 William Blows inadvertently named another species, ''Valdosaurus dextrapoda'', by including this name in a fauna list,〔Blows, W.T., 1998, "A review of Lower and Middle Cretaceous dinosaurs of England", ''New Mexico Museum of Natural History and Science Bulletin, Albuquerque'' 14: 29-38〕 but this was an error, and the species has never been supported.〔Martill, D.M. and Naish, D., 2001, "Ornithopod dinosaurs." Pages 60-132 in Martill, D.M. and Naish, D. (eds.). ''Dinosaurs of the Isle of Wight,'' The Palaeontological Association, London.〕〔Galton, P.M., 2009, "Notes on Neocomian (Late Cretaceous) ornithopod dinosaurs from England - ''Hypsilophodon'', ''Valdosaurus'', "Camptosaurus", "Iguanodon" - and referred specimens from Romania and elsewhere", ''Revue de Paléobiologie'' 28(1): 211-273〕 Lacking description, it is a ''nomen nudum''.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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