| 名稱 三葉蟲化石 | Name Elrathia sp. Fossil |
| 地質年代 寒武紀 | Geological Age Cambrian |
| 描述 三葉蟲是海洋生物，是最早的節肢動物群之一，也是當時最成功的動物之一，在海洋中漫遊超過2.7億年。他們的身體由三部分組成：頭部，身體和尾巴。這些生物的大小並不相同。愛爾納蟲（學名：Elrathia），又名艾雷斯蟲、厄拉夏蟲，是生存於寒武紀海洋中的一屬三葉蟲，生活在大陸棚海底。這類三葉蟲的頭比胸要小。眉間很小呈花盆狀，小眼睛和短小的三角形頰部棘刺長在中心部位。胸部分為13節，有條窄小的中軸和寬闊的側板，最後是短小多刺的末梢。尾部大小中等，寬是長的兩倍，中軸延伸到尾部。 | Description Elrathia is a genus of ptychopariid trilobite species that lived during the Middle Cambrian of Utah, and possibly British Columbia. It was marine creatures that were one of the earliest groups of arthropods, and some of the most successful animals of their time, roaming the oceans for over 270 million years. E. kingii is one of the most common trilobite fossils in the USA locally found in extremely high concentrations within the Wheeler Formation in the U.S. state of Utah. Their body was made up of three sections: a head, body, & tail. These creatures varied in size. |
| 地點 美國 | Location US |
| 參考 Reference https://en.m.wikipedia.org/wiki/Elrathia https://zh.wikipedia.org/wiki/%E6%84%9B%E7%88%BE%E7%B4%8D%E8%9F%B2 | |
| 編者 由 3E (18) 李嘉穎 於4/6/2018編寫 由 3B (18) 馬芷瑤 於30/5/2019最後編改 | Editor Created by 3E (18) Lee Ka Wing on 4/6/2018 Last modified by 3B (18) Ma Tsz Yiu as on 30/5/2019 |
