Kinematic models of Anomalocaris canadensis, fully outstretched (top) to rolled up (bottom left) with the range of motion shown in gray (bottom right). Credit must be given to the creator.

Field images of Burgessomedusa phasmiformis jellyfish specimens (middle right ROMIP 65789 – see close up images) and of the top arthropod predator Anomalocaris canadensis preserved on the same ...