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Valdoraptor : ウィキペディア英語版
Valdoraptor

''Valdoraptor'' (meaning "Wealden plunderer") is a genus of theropod dinosaur from the Early Cretaceous. Its fossils were found in England. It is known only from bones of the feet. The holotype, BMNH R2559 (incorrectly given by Owen as BMNH R2556), was found near Cuckfield in layers of the Tunbridge Wells Sand Formation dating from the late Valanginian. The specimen is damaged lacking parts of the upper and lower ends. It has a conserved length of and an estimated length of .
==Discovery==
In 1858 Richard Owen referred a fossil consisting of a set of three metatarsals, foot bones, part of the collection of the British Museum of Natural History, to the herbivorous dinosaur genus ''Hylaeosaurus'' because of its size and bone texture.〔Owen, R., 1858, ''Monograph on the fossil Reptilia of the Wealden and Purbeck Formations. Part IV. Dinosauria (Hylaeosaurus). ()''. The Palaeontological Society, London 1856-1864: 8-26〕 Owen had a lithograph made of the bones that gave a mirrored image: although they were in fact from the left foot, it now seemed they were from the right foot.
By 1881 John Whitaker Hulke had recognised that the specimen represented a foot from a carnivorous theropod. In 1888 Richard Lydekker referred the specimen to the theropod species ''Megalosaurus dunkeri''〔Lydekker, R., 1888, "On the remains and affinities of five genera of Mesozoic reptiles", ''Quarterly Journal of the Geological Society of London'' 45: 41-59〕 but in 1889 he named a separate species for it because of the more robust build: ''Megalosaurus oweni''. The specific name honours Owen.〔Lydekker, R., 1889, "Note on some points in the nomenclature of fossil reptiles and amphibians, with preliminary notices of two new species" ''Geological Magazine'', decade 3 6: 325-326〕 Lydekker was deceived by the 1858 illustration into thinking that it was the right foot. He also incorrectly assumed it had four metatarsals, a mistake repeated for over a century. Lydekker referred several other foot specimens to the species: BMNH 2574, 2661 and 2680 from the same stratigraphic horizon, and also BMNH R604d and BMNH R1525, uncovered from the earlier Wadhurst Clay Formation in the ''Hollington Quarry'' near Hastings.

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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