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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 Ramoceros ： ウィキペディア英語版 Ramoceros ''Ramoceros'' is an extinct genus of the artiodactyl family Antilocapridae endemic to Miocene and Pliocene North America.〔Blount, Kitty and Crowley, Maggie. ''Encyclopedia of Dinosaurs & Prehistoric Life'', p. 271 (Penguin, 2008).〕 ==Relatives and characteristics== ''Ramoceros'' was a prehistoric relative of modern pronghorn (''Antilocapra americana''), which is a species of artiodactyl mammal indigenous to interior western and central North America; modern pronghorn are the second-fastest mammal in the world.〔 The modern pronghorn weighs about , whereas the smaller ''Ramoceros'' generally weighed .〔Kues, Barry. ''The Paleontology of New Mexico'', p. 364 (University of New Mexico Press, 2008).〕 ''Ramoceros'' is one of several genera that originated from the subfamily Merycodontinae, of which the pronghorn is the only surviving remnant.〔Heffelfinger, Jim. ''Deer of the Southwest: A Complete Guide to the Natural History, Biology, and Management of Southwestern Mule Deer and White-tailed Deer'', p. 26 (Texas A&M University Press, 2006).〕 In fact, pronghorn is the only surviving remnant of the entire family Antilocapridae.〔Smithsonian Institution. North American Mammals: (Pronghorn ''Antilocapra americana'' )〕 The long forked horns of ''Ramoceros'' may have been used by rival males in competition. Like other antilocaprids, ''Ramoceros'' regrew their horns every year, forming new horns growing on bony centers. For that reason, many scientists believe they are more closely related to deer than to cattle.〔 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「Ramoceros」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.