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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 Borophaginae ： ウィキペディア英語版 Borophaginae The subfamily Borophaginae is an extinct group of canids called "bone-crushing dogs"〔http://paleodb.org/cgi-bin/bridge.pl?action=checkTaxonInfo&taxon_no=83323&is_real_user=1 Paleobiology Database: Borophaginae〕 that were endemic to North America during the Oligocene to Pliocene and lived roughly 36—2.5 million years ago and existing for about . ==Origin== The Borophaginae apparently descended from the subfamily Hesperocyoninae. The earliest and most primitive borophagine is the genus ''Archaeocyon'', which is a small fox-sized animal mostly found in the fossil beds in western North America. The borophagines soon diversified into several major groups. They evolved to become considerably larger than their predecessors, and filled a wide range of niches in late Cenozoic North America, from small omnivores to powerful, bear-sized carnivores, such as ''Epicyon''.〔 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「Borophaginae」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.