求古生物中文名称：Marella是一种寒武纪节肢动物（arthropod）,在Burgess Shale中很常见.最好给出相关链接
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求古生物中文名称：Marella是一种寒武纪节肢动物（arthropod）,在Burgess Shale中很常见.最好给出相关链接
求古生物中文名称：Marella
是一种寒武纪节肢动物（arthropod）,在Burgess Shale中很常见.
最好给出相关链接
求古生物中文名称：Marella是一种寒武纪节肢动物（arthropod）,在Burgess Shale中很常见.最好给出相关链接
马雷拉,或者花边蟹
下面的网站有具体介绍,不用翻译了吧：）
Arthropods apparently got off to an early start. By the time of the Burgess Shale in the Middle Cambrian arthropods and their immediate relations were already the most diverse and successful group of animals. The anomalocarids (which were either arthropods or their immediate sister group) were the world's earliest known large predator, with lengths approaching 2 meters. Trilobites are well known from Cambrian Epoch 2 onwards, since their hard carapace fossilizes easily. In addition to trilobites and several other high-level taxa of extinct arthropods, it is almost certain that many of the important arthropod groups of today had already diverged by this time, including the chelicerates, crustaceans, and arachnids. Xiphosurans and some derived crustacean groups are known by the end of the Cambrian. At that time the trilobites experienced several rounds of turnover as the nature of the sea floor environment began to change. Of the miraculous variety of arthropod in the Burgess Shale, only 4 basic designs survived the end of the Cambrian. Of the four, the trilobites were extinguished at the end of the Permian. The remaining three are the insects (Hexapoda), the crustaceans, and the chelicerates.