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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 Eosacantha ： ウィキペディア英語版 Eosacantha ''Eosacantha'' is an extinct genus of tortoise beetle in the family Chrysomelidae and containing a single species ''Eosacantha delocranioides''. The species is known only from the Middle Eocene Parachute Member, part of the Green River Formation, in the Piceance Creek Basin, Garfield County, northwestern Colorado, USA.〔 ==History and classification== ''Eosacantha delocranioides'' is known only from one fossil, the holotype, specimen number "USNM 79136". The specimen is complete but of unidentified sex, preserved as a compression fossil in sedimentary rock. It was recovered from outcrops of the Green River Formation's Parachute Member, locality 41140, exposed in the Anvil Points area of Garfield County, Colorado, USA.〔 The type specimen is currently preserved in the Department of Paleobiology collections housed in the National Museum of Natural History, located in Washington, D.C., USA. ''Eosacantha'' was first studied by Caroline S. Chaboo and Michael S. Engel of the University of Kansas, Lawrence, Kansas, USA. Their 2009 type description of the genus and species was published online and in print in the journal ''Systematic Entomology''.〔 The generic name was coined by Chaboo and Engel from a combination of the Greek (') meaning "dawn" and the Greek word (') meaning "thorny". The etymology of the specific epithet ''ラテン語:delocranioides'' is in reference to the general resemblance to some modern species in the genus ''Delocrania''.〔 When described, ''Eosacantha delocranioides'' along with ''Denaeaspis chelonopsis'' were among the oldest derived tortoise beetles in the fossil record. The nearest modern relatives to ''Eosacantha'' in the tribe Notosacanthini are restricted to African, tropical Asian, and Australian regions.〔 The loss of the tribe from North America may be related to specialization of the beetles to specific plant hosts that were lost due to the extensive climatic shifts during the Late Eocene – Early Oligocene transition.〔 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「Eosacantha」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.