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More model information三葉虫 (古生代デボン紀;ボリビア) 古生代に生息した海棲節足動物。5〜4億年前頃が最盛期で、2億5000万年前に絶滅した。外骨格が、軸部と左右の肋部の3区分からなることから「三葉虫」と名付けられた 。 【東京工業大学地球史資料館】
Trilobite (Devonian, Paleozoic; Bolivia) Trilobites are extinct marine arthropods in the Paleozoic era, at its peak around 500-400 million years ago, and became extinct 250 million years ago. The exoskeleton is divided into three sections, the central axis and the left and right pleura, that is the origin of the name “trilobite”. [Museum of Evolving Earth, Tokyo Institute of Technology]
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