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Achatella
''Achatella'' is a genus of trilobite in the order Phacopida, which existed in what is now Ontario, Canada. It was named by Delo in 1935, and the type species is ''Achatella achates'', which was originally assigned to the genus ''Dalmanites'' by Billings in 1860. ''Achatella'' also contains the species ''Achatella billingsi'', and ''Achatella truncatocaudata''.〔(Available Generic Names for Trilobites ) P.A. Jell and J.M. Adrain.〕 ==References==
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「Achatella」の詳細全文を読む
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