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Perspicaris : ウィキペディア英語版
Perspicaris

''Perspicaris'' is a fossil arthropod from the Cambrian period. It was long and bivalved. The valves, encasing the thorax, were joined together by a dorsal hinge.
It is difficult to establish the lifestyle of ''Perspicaris''. Its large eyes and other parts would suggest a swimming animal, yet it lacks claws, which seems to suggest a bottom feeder.〔http://www.nmnh.si.edu/paleo/shale/pperspic.htm〕
Two species of ''Perspicaris'' are found in the famous Burgess Shale in British Columbia, Canada.
== External links ==

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