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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 Megalictis ferox ： ウィキペディア英語版 Megalictis ferox ''Megalictis ferox'' was a species of large predatory mustelid, now extinct, which existed in North America during the "cat gap" in the Miocene period. It is thought to have resembled a large wolverine, with a body mass of up to . ==Species identification== The genus ''Megalictis'' was first described by W. D. Matthew in 1907, and assigned to the family ''Mustelidae''.〔Paleobiology Database〕 Two similar genera discovered at the same time, ''Aelurocyon'' (Peterson, 1907) and ''Paroligobunis'' (Peterson, 1910) were identified as synonymous with ''Megalictis'' in 1996.〔Andersson, p.39〕 P. R. Bjork, in 1970, assigned the genus to the subfamily ''Mellivorinae'',〔Bjork, p.18〕 whilst J. A. Baskin reassigned it to ''Oligobuninae'' in 1998.〔 Two other species have been identified in the genus: ''Megalictis petersoni'' and ''Megalictis frazieri'', whilst two more, ''Megalictis brevifacies'' and ''Megalictis simplicidens'', have since been determined to be synonymous with ''Megalictis ferox''. Other synonyms for the species include ''Aelurocyon brevifacies'', ''Brachypsalis simplicidens'' and ''Paroligobunis simplicidens''.〔 Specimens of the species have been found at ten sites in South Dakota, Nebraska and Wyoming, dated to the Harrisonian period - from 24.8 to 20.6 million years ago.〔 The 19 specimens so far identified have a wide range of sizes,〔 which is believed to be evidence of extreme sexual dimorphism, a phenomenon where males and females of the species will grow to different sizes; a 1996 study rejected the possibility of multiple "morphologically uniform" but differently sized species as unlikely.〔Hunt & Skolnick, quoted Andersson, p.39-40〕 However, later studies identified significant morphological variation in the joints of the forearms, which would not be consistent with sexual dimorphism. suggests that the identification of all of these as a single species may need revision.〔Andersson, p.11 & p.40〕 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「Megalictis ferox」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.