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Grypania
''Grypania'' is an early, tube-shaped fossil from the Proterozoic eon. The organism could have been a giant bacterium or bacterial colony, but because of its size (over one centimeter) and consistent form, is more likely to have been a eukaryotic alga. The oldest probable ''Grypania'' fossils date to about 2.1 billion years ago, and the youngest extended into the Mesoproterozoic era. ''Grypania'' reproduced asexually . == 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「Grypania」の詳細全文を読む
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