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Xanioascus
''Xanioascus canadensis'' is an extinct ctenophore, known from the Canadian Burgess Shale in British Columbia. The species which is about 515 to 505 million years old had 24 comb rows - in contrast to all modern forms which have only 8. Other important Cambrian ctenophore fossils are ''Fasciculus vesanus'' and ''Ctenorhabdotus capulus''. ==See also==
*''Ctenorhabdotus capulus'' *''Fasciculus vesanus''
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「Xanioascus」の詳細全文を読む
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