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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 Aulacopleura ： ウィキペディア英語版 Aulacopleura ''Aulacopleura'' is a genus of proetid trilobite that lived from the Middle Ordovician to the Middle Devonian. The cephalon is semicircular or semielliptical, with border and preglabellar field. The glabella is short, with or without defined eye ridges connecting it with eyes of variable size. Spines at the rear outer corners of the cephalon (or genal spines) are present, typically reaching back to the 2nd to 4th thorax segment. The 'palate' (or hypostome) is not connected to the dorsal shield of the cephalon (or natant). The cephalon is pitted, or has small tubercles. The thorax has up to 22 segments. The pleural ends are usually rounded. The pygidium is small (micropygous), with an even margin. == Taxonomy == Barrande described ''Arethusa konincki'' in 1846. However, ''Arethusa'' was occupied since it was used by De Montfort in 1808 for a foram.〔(【引用サイトリンク】author= Micropaleontology Press )〕 Barrande tried to correct this by proposing ''Arethusina'' as a replacement, but by that time that Hawle and Corda had already suggested ''Aulacopleura'' in 1847, which is thus the senior available name. 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「Aulacopleura」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.