Eobacterium isolatum

Japanese: エオバクテリウム(英語表記)Eobacterium isolatum
Eobacterium isolatum
A bacterial fossil discovered in the Archean Swartkoppie Formation in the Barberton region of South Africa. This layer is the top of the Onverwacht Group, and its geological age is estimated to be 3.1 billion years old. Eo comes from the Greek words for dawn or primeval, and means the oldest bacteria. It was named by ES Berghorn and JW Schopf (1966), and their report states that it was found in the Fig Tree Group, but Schopf later corrected it as above. This fossil, measuring 0.5-0.7 x 0.2-0.3 μm, was found in chert using an electron microscope, and is thought to be a rod-shaped bacillus-type bacterium.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:
南アフリカのバーバートン地方に分布する始生代のスワートコッピー累層から発見されたバクテリアの化石。この地層はオンフェルワクト層群最上部にあたり,その地質年代は31億年前とされている。エオはギリシア語の暁,原始に由来し,最古のバクテリアの意。E.S.バーグホーン,J.W.ショップの命名で(1966),その報告ではフィグツリー層群から産出したと記載されているが,後にショップが上記のように訂正している。この化石はチャート中から電子顕微鏡で見いだされた0.5~0.7×0.2~0.3μmの大きさの化石で,杆状をしたバシルス型のバクテリアと考えられている。

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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