Reaction-diffusion could easily generate these patterns. There are several places in parameter space that look possibly correct. http://mrob.com/pub/comp/xmorph

Reaction-diffusion could easily generate these patterns. There are several places in parameter space that look possibly correct. http://mrob.com/pub/comp/xmorphia/index.html http://mrob.com/pub/comp/xmorphia/index.html