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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 Shuotherium ： ウィキペディア英語版 Shuotherium ''Shuotherium'' is a fossil relative of the monotremes known from Bathonian (Middle Jurassic) layers of the Forest Marble Formation, England, and from Middle-Late Jurassic layers of the Shaximiao Formation of Sichuan, China. The original holotype is composed of a partial dentary and seven teeth (two which are incomplete). The holotypes for other species of this genus are solely represented by isolated molars. ''Shuotherium'', along with ''Pseudotribos'' has been placed in the family Shuotheriidae as a sister taxon of the Australosphenida (see, Yinotheria).〔 ==Description== In it lower molars, the talonid is situated in front of the trigonid, such a unique dental form is distinct from the typical tribosphenic pattern. In this "pseudotribosphenic" trait, the mesial cingulid is expanded to form a pseudotalonid, and its distal talonid is underdeveloped. It shares with Australosphenida a thin, slender dentary but differs from the non-monotreme Ausktribosphenida by having more developed postdentary trough. Its dental formula has been reconstructed as: had this to say regarding the fossil:〔 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「Shuotherium」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.