Yes, but included were box and the gopher. That was just one site, one article. Reptile Magazine I think. I can't find anything that says counting rings to be anything other then a guesstimated tool basically, but not a reliable accurate one.I agree completely with aquatic turtles. They grow completely differently. They lay down new keratin under the entire scute and shed the old layer regularly. There is no growth ring that occurs in most aquatics because of this.