Pikaia Hallucigenia Hallucigenia Anomalocaris Anomalocaris Marella Ottoia A diverse array of animals was found in fossils from the Burgess Shale site in British Columbia, dating from the Cambrian period.

They include:

Pikaia (swimming eel-like chordate)

Hallucigenia (with spikes on seafloor)

Anomalocaris (large clawed predator)

Marella (arthropod swimming at left)

Ottoia (burrowing U-shaped worm)

Cambrian exhibit at Field Museum.