| The
Burgess Shale: Evolution's Big Bang
Marrella
Charles Walcott
nicknamed Marella the “lace crab” and it is the most
abundant fossil in the Burgess Shale quarry. The strange head shield has
two pairs of large spines curving back over the body. Two pairs of antennae
project forward and the body consists of numerous segments bearing identically
shaped limbs.
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