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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 Ursus maritimus tyrannus ： ウィキペディア英語版 Ursus maritimus tyrannus ''Ursus maritimus tyrannus'' is an extinct subspecies of polar bear, known from a single fragmentary ulna found in the gravels of the Thames at Kew Bridge, London. It was named by the Finnish paleontologist Björn Kurtén in 1964 and is interpreted to represent a relatively large subadult individual: the ulna is estimated to have been long when complete, "the longest ursine ulna on record". Dating back to the Late Pleistocene, approximately 70,000 years ago, it is the oldest fossil assigned to the polar bear; however, an unpublished reinvestigation of the fossil suggest brown bear affinities. ==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「Ursus maritimus tyrannus」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.