I had a guy this year that sent me a picture of a VERY thayeri looking snake.....
He asked me if I wanted it....

I asked if he had some background info on it and he told me it was a hybrid......
The mother was an amel ruthveni and the father was a mex mex.....

Just a small example of a south to north genetic drift.....
Ruthveni to the south....mex mex in the middle and thayeri to the north of mex mex.........

I'm not saying that every time you breed a ruthveni to a mex mex you will get thayeri looking offspring but this one was......

I have an opinion that Ruthveni is that ancestoral grandparent to all of them....But it is just an opinion/theory......
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John Lassiter
Poor planning and procrastination on your part does not constitute an emergency on my part...
www.coastalbendcaptivebreeding.com