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Winfrenatia
''Winfrenatia'' is the oldest known terrestrial lichen, known from the lower Devonian Rhynie Chert. It comprises a thallus, made of layered, aseptate hyphae, with a number of depressions on its top surface. Each depression contains a net of hyphae holding a sheathed cyanobacterium. The fungus appears to be related to the Zygomycetes, and the photobiont resembles the coccoid Gloeocapsa and Chroococcidiopsis. There may be two separate algae, making the lichen a symbiosis of three organisms.〔 ==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「Winfrenatia」の詳細全文を読む
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