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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 Kuehneotherium ： ウィキペディア英語版 Kuehneotherium ''Kuehneotherium'' is an early mammaliaform genus that lived during the late Triassic period and is characterized by reversed-triangle pattern of molar cusps.〔Kermack, Doris M., Kermack, K.A. and Mussett, Frances, (1968) The Welsh pantothere Kuehneotherium praecursoris. Journal of the Linnean Society of London, Zoology, 47, 312, pp. 407-423〕 Although a large number of fossils have been found, the fossils are limited to teeth, dental fragments, and mandible fragments. The genus includes ''Kuehneotherium praecursoris'' and all related species. It was first named and described by Doris M. Kermack, K. A. Kermack, and Frances Mussett in November 1967. The family Kuehneotheriidae and the genus ''Kuehneotherium'' were created to house the single species ''Kuehneotherium praecursoris''. Modeling based upon a comparison of the ''Kuehneotherium'' jaw with other mammals indicates they were about the size of a modern day shrew between 4 and 5.5 g at adulthood. ''Kuehneotherium'' is thought to be an insectivore that could consume only soft-bodied insects such as moths. Their teeth were shaped for vertical shearing and could not crush harder prey. They lived alongside another early mammal, ''Morganucodon'', which had teeth that could crush harder insects such as beetles. This distinction in diet shows that early mammals adapted to have a separate feeding niche so they would not compete for food.〔Gill, Pam, M.D. Morganucodon – lower jaw of an early mammal, Animal Bytes 13 June 2013. Web. retrieved http://animalbytescambridge.wordpress.com/2013/06/05/morganucodon-lower-jaw-of-an-early-mammal/#comments〕 ==Geographic distribution and geological age== Fossil teeth of the first identified ''Kuehneotherium preacursoris'' specimens were found in the Pontalun Quarry in a single fissure pocket in South Wales. The deposit found in limestone is from the Late Triassic. (Whiteside and Marshall 2008) Additional ''Kuehneotherium'' fossils have been found in rock formations of the Middle Jurassic of Britain (Somerset), Luxemburg, the Late Triassic of France (Saint-Nicolas-de-Porte), the Lower Jurassic Kota Formation of India, and the Late Triassic of Greenland. 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「Kuehneotherium」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.