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Sphenothallus : ウィキペディア英語版
Sphenothallus

''Sphenothallus'' is a problematic extinct genus lately attributed to the conulariids. It was widespread in shallow marine environments during the Paleozoic.

== Occurrence ==
''Sphenothallus'' is represented in the Cambrian period in the Kaili biota and the Mount Stephen trilobite beds, where it co-occurs with the similar organisms ''Cambrorhythium'' and ''Byronia''. It is known in younger strata in Canada and the USA, surviving at least until the Mississippian.

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「Sphenothallus」の詳細全文を読む



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