Time: Early Cambrian (~520 million years ago)
mm long X 10 mm wide
Burgess Shale, Stephen Formation, Burgess Pass, British Columbia,
Canadaspis perfecta is a bivalved arthropod found in the Bugess
Shale Fauna of British Columbia. It is the only taxon from the
region known from both single and multiple examples that presumably
together. It was presumably a benthic organism that made
a living walking on the seafloor, using its limbs to sir up the
bottom sediment It is the type species of a genus also found in
deposits in Utah and Nevada. An older species Canadaspis
laevigata is known from the Chengjiang
Biota of China.
the abdomen and partial legs seen outside the carapace. This wonderful
example shows incredible detail for a specimen more than a half
billion years of age.