Keywords: Wiwaxia 3G crop.JPG en Wiwaxia corrugata from the Burgess Shale ROM 61151 Fig 3G “ Mature specimen with incipient spines and partial scleritome exposing underlying tissue 2011-08-22 11 08 11 From Smith 2013 doi 10 5061/dryad 868sm / doi 10 1111/pala 12063 Martin R Smith cc-zero Wiwaxia fossils Wiwaxiidae fossils Burgess Shale |