Hallucigenia concept art, along with a few other animals
Hallucigenia is a stem-onychophoran that lived from Cambrian Stage 3 to the mid Cambrian. It was 0.5 to 3.5 centimeters long, and had long spines from its back.
What could have been
Just like Opabinia, Hallucigenia was supposed to appear in Death rays, but was cut because the model was not completed on time.