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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 Kutchicetus ： ウィキペディア英語版 Kutchicetus ''Kutchicetus'' ("Kutch whale") is an extinct genus of early whale of the family Remingtonocetidae that lived during Early-Middle Eocene (Lutetian and Ypresian) in what is now the coastal border of Pakistan and India (, paleocoordinates ).〔. Retrieved July 2013.〕〔. Retrieved July 2013.〕 It is closely related to ''Andrewsiphius'' with which it was synonymized by . proposed a new clade, Andrewsiphiinae, for the two species Later authors,〔E.g., 〕 however, still accept both as separate genera. ''Kutchicetus'' is smaller than other remingtonocetids, and probably is the smallest Eocene cetacean. With its extremely narrow snout, it resembles ''Remingtonocetus'' and ''Dalanistes'', but its strong tail distinguishes it from both ''Remingtonocetus'' and ''Andrewsiphius''. Its limbs were short. ''Kutchicetus''' vertebral formula is 7, 15, 8, 4, 20–25. Its four fused sacral vertebrae were probably articulated to the hip bone and the numerous tail vertebrae were robust and elongated in contrast to its short and relatively gracile limb bones. This morphology suggests that the tail played an important role in its locomotion, yet the proportions of the caudal-most vertebrae indicates ''Kutchicetus'' did not have flukes. ''Kutchicetus''' vertebral proportions are unlike those of any other cetaceans but similar to those of some land-living or semi-aquatic mammals, such as ''Pachyaena'' and otters. ''Kutchicetus''' limbs and sacrum were probably weight-bearing and it probably swam using undulatory movements like modern otters and most likely ''Ambulocetus''. This mode of locomotion represents a transitional stage in whale evolution.〔 ==See also== *Evolution of cetaceans 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「Kutchicetus」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.