Traces of Marine Life

A diagram of the critters responsible for many types of trace fossils.  These particular ones depict a few of the animals around in the Cretaceous seas of Wyoming.  The line art was created by Russell Hawley.

While I did not draw the line art for this image, I did color it, using GIMP, for use in the museum where I work.  I have full permission from Russell to post my coloration of this here on DA.  I loosely based the coloration of this guy on a couple different species of horned lizards that I have encountered in my life.