So after reading the paper, I fully expect to be alive and well when someone contradicts their findings. This appears to occur regularly.
The ITIS still lists 9 subspecies and would go with that, since I live in the US. I have notice in a few sites, like ITIS, that other classification results have been adopted.
So, for crossbreeding, i guess that means use your own beliefs and judgement because you can probably find a paper to justify it.
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OGFSnakes

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