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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 Pengana ： ウィキペディア英語版 Pengana ''Pengana robertbolesi'', also referred to as the flexiraptor, is an extinct bird of prey that lived during the Early Miocene (23–16 million years ago). Living relatives of ''P. robertbolesi'' may include the harriers. When alive, it may have resembled a cross between the secretary bird and crested caracara. Its remains were found in Riversleigh, Queensland, Australia. ''P. robertbolesi'' is only known from a tibiotarsus (ankle bone). However, this is of most peculiar construction, allowing the leg to be swivelled backwards and sideways. The bird was thus well adapted to reaching into holes and crevices and extracting prey. The vernacular name ''flexiraptor'' was coined to reflect this ability. == References == * Boles, W. E. (1993a): ''Pengana robertbolesi'', a peculiar bird of prey from the Tertiary of Riversleigh, northwestern Queensland, Australia. ''Alcheringa'' 17: 19-26. * Boles, W. E. (1993b): The fabulous flexiraptor: a bird with a strange twist. ''Riversleigh Notes'' 22: 2-3. 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「Pengana」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.