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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Istiodactylidae ： ウィキペディア英語版 Istiodactylidae Istiodactylidae is a small family of pterosaurs. This family was named in 2001 after the type genus ''Istiodactylus'' was discovered not to be a member of the genus ''Ornithodesmus''. Remains of taxa that can be confidently assigned to Istiodactylidae have been found in the UK and China, in rocks dating from the Early Cretaceous period (Barremian to Aptian stage). Arbour and Currie (2011) described Canadian ''Gwawinapterus beardi'' as a member of Istiodactylidae living in the late Cretaceous (upper Campanian stage);〔Arbour, V.M. and Currie, P.J. (2011). "An istiodactylid pterosaur from the Upper Cretaceous Nanaimo Group, Hornby Island, British Columbia, Canada." ''Canadian Journal of Earth Sciences'', 48(1): 63-69. 〕 however, Witton (2012) suggested the tooth replacement pattern in this animal does not match that of pterosaurs, suggesting that the species might be non-pterosaurian.〔 Additional research suggested that the species was in fact a fish.〔Vullo, R., Buffetaut, E. and Everhart, M.J. (2012). "Reappraisal of ''Gwawinapterus beardi'' from the Late Cretaceous of Canada: a saurodontid fish, not a pterosaur." ''Journal of Vertebrate Paleontology'', 32(5): 1198-1201. 〕 The earliest known species might be ''Archaeoistiodactylus linglongtaensis'', from the Middle Jurassic of China;〔Lü, J. and Fucha, X. (2010). "A new pterosaur (Pterosauria) from Middle Jurassic Tiaojishan Formation of western Liaoning, China." ''Global Geology'', Z1: 113-118.〕 however, it also has been suggested that the holotype specimen of this species might actually be a poorly preserved specimen of ''Darwinopterus''. ''Hongshanopterus'', a supposed istiodactylid from China, has been reclassified as a non-istiodactylid member of Ornithocheroidea of uncertain phylogenetic placement by Witton (2012).〔 Istiodactylids were medium sized pterosaurs with flat, rounded jaws similar to that of a duck. They had small teeth lining their jaws, however. ==References== 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「Istiodactylidae」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.