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Calodiscidae : ウィキペディア英語版 | Calodiscidae
The Calodiscidae are a family of trilobites belonging to the order Agnostida that lived during the Lower Cambrian (Botomian and Toyonian). They are small or very small, and have a thorax of two or three segments. The Hebediscidae include five genera (see box). == Taxonomy == The probable ancestors of the Calodiscidae are among the Tsunydiscidae. The Calodiscidae had no descendants.〔 cited in 〕
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「Calodiscidae」の詳細全文を読む
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