Marella splendens was an arthropod that lived during the Cambrian Period. It is the most common fossil in the Burgess Shale. When discovered it was nicknamed the "lace crab".
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The Lace Crab

Smithsonian Institution
Marella splendens was an arthropod that lived during the Cambrian Period. It is the most common fossil in the Burgess Shale. When discovered it was nicknamed the "lace crab".