…The appearance of eukaryotic algae appears to have been much later. Fossils of what appear to be dividing green algae with nuclei and pyrenoids have been found in strata dating back about 900 million years, and have been named Glenobotrydion . Red algae (corallinaceous algae), green algae (corynophytes), and charophytes deposit calcium carbonate (lime) in their bodies, while diatoms deposit silicic acid, making them more likely to remain as fossils. … *Some of the terminology explanations that mention "Glenobotrydion" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…真核性の藻類の出現はそれよりかなり遅れたらしい。約9億年前の地層からは核やピレノイドをもつ細胞分裂中の緑藻と思われる化石が得られ,Glenobotrydionと名づけられている。紅藻のサンゴモ類,緑藻のカサノリ類,および車軸藻類は炭酸カルシウム(石灰)を,またケイ藻類はケイ酸をそれぞれ体に沈着するので化石として残りやすい。… ※「Glenobotrydion」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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