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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 Saint Helena crake ： ウィキペディア英語版 Saint Helena crake The Saint Helena crake or Saint Helena rail (''Porzana astrictocarpus'') is an extinct bird species from the island of Saint Helena in the South Atlantic Ocean, one of two flightless rails which survived there until the early 16th century.〔Storrs L. Olson, Paleornithology of St Helena Island, south Atlantic Ocean, Smithsonian Contributions to Paleobiology 23 (1975)〕 After American ornithologist Alexander Wetmore described bones of the large Saint Helena swamphen (''Atlantisia podarces'') from Prosperous Bay, Saint Helena, in 1963, American paleontologist Storrs Olson found almost complete skeletons of the Saint Helena Crake in the same region in 1973. These skeletons consists of bones which were smaller than the bones of ''Atlantisia podarces''. Due to the peculiar shape of the carpometacarpus Olson named this species ''Porzana astrictocarpus''.〔 Olson proceeded on the assumption that the Saint Helena Crake was a derivative of the Baillon's crake (''Porzana pusilla'') which is widespread in Europe and Africa. Thus, that there were no predators on Saint Helena and it had lost its ability to fly. However, when Saint Helena was colonised around 1502, the settlers brought a lot of mammals to the island, which sealed the fate of the Saint Helena crake.〔 ==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「Saint Helena crake」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.