|
''Iuticosaurus'' (meaning "Jute lizard") is the name given to a genus of dinosaur from the Early Cretaceous of the Isle of Wight. ''Iuticosaurus'' was a sauropod, specifically a titanosaur. In 1887 Richard Lydekker described two sauropod tail vertebrae found by William D. Fox near Brook Bay on Wight, BMNH R146a en BMNH 151, and referred them to the genus ''Ornithopsis'', despite indicating their similarity to ''Titanosaurus'', because the tail of ''Ornithopsis'' was unknown.〔Lydekker, R., 1887, "On certain dinosaurian vertebrae from the Cretaceous of India and the Isle of Wight", ''Quarterly Journal of the Geological Society of London'' 43: 157–160〕 On reading the paper to the Geological Society of London, Lydekker was criticised by Harry Govier Seeley and John Hulke for his choice and in 1888 he referred to the fossils as ''Titanosaurus'' sp. a, ''Titanosaurus'' sp. b being a third vertebra, BMNH 32390.〔Lydekker, R., 1888, ''Catalogue of fossil reptilia and Amphibia in the British Museum. Pt. I. Containing the orders Ornithosauria, Crocodilia, Dinosauria, Squamata, Rhynchocephalia, and Proterosauria'', British Museum of Natural History, London, 309 pp〕 In 1929 Friedrich von Huene named both taxa as full species. The first became ''Titanosaurus Valdensis'', the specific name referring to the Wealden, the second ''Titanosaurus Lydekkeri'', its specific name honouring Lydekker.〔Huene, F. v. 1929, "Los saurisquios y ornitisquios del Cretáceo Argentino", ''Anales del Museo de La Plata (series 3)'' 3: 1–196〕 By present convention both specific names would be spelled as ''T. valdensis'' and ''T. lydekkeri'' respectively. In 1993 Jean le Loeuff redescribed the material and named a separate genus: ''Iuticosaurus'', the generic name referring to the Jutes who settled the island in the fifth century and established a Jute dynasty in the sixth century. Le Loeuff made ''Iuticosaurus valdensis'' the type species, and chose BMNH 151 as the lectotype. Another vertebra, BMNH R 1886, was referred by him to this species. The second species, though formally named by him as ''Iuticosaurus lydekkeri'', he considered a ''nomen dubium''.〔J. le Loeuff, E. Buffetaut, M. Martin, V. Martin & H. Tong, 1993, "Découverte d'Hadrosauridae (Dinosauria, Ornithischia) dans le Maastrichtien des Corbières (Aude, France)", ''Comptes Rendus de l'Academie des Sciences, Série II'' 316: 1023-1029〕 ''I. valdensis'' was found in the Wessex Formation and ''I. lydekkeri'' in the younger Upper Greensand. ''Iuticosaurus'' was probably similar to ''Titanosaurus''. It measured 15 to 20 metres (49–65 feet) long. Most researchers have concluded that ''I. valdensis'' cannot be distinguished from other titanosaurs and is therefore a ''nomen dubium'' also. ==Notes== 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「Iuticosaurus」の詳細全文を読む スポンサード リンク
|