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Serrodiscus
''Serrodiscus'' is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It has been collected from the Lower Cambrian of Canada (Nova Scotia), Germany (Silesia), Poland (Holy Cross Mountains), Russia (Kuznetsk Alatau), the United Kingdom (Wales) and the United States (Massachusetts, New York State). It is named for the spines on the ventral side of the tailshield (or pygidium, which give it a serrated impression. == Distribution ==
* ''S. bellimarginatus'' is known from the Lower Cambrian of Canada (Atdabanian, ''Callavia broeggeri'' zone, Branchian Series, Brigus Formation).〔 ''cited on'' (【引用サイトリンク】author= Phil Borkow )〕 * ''S. speciosus'' has been found in the Lower Cambrian of Poland (Atdabanian, Ocieseki Sandstone and Kamieniec Shale, Holy Cross Mountains).〔 ''cited on'' (【引用サイトリンク】author= Uta Merkel )〕
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「Serrodiscus」の詳細全文を読む
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