Posted by:
Jlassiter
at Thu Aug 20 12:00:58 2009 [ Email Message ] [ Show All Posts by Jlassiter ]
>>>>It is the Santa Rosa Canyon in Sierra Madre Occidental, Nuevo Leon.....I am not saying all MSPs come from here but all specimens found here are MSPs......
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>>It's just about the whole eastern flank, and it is an arc shaped range that includes localities in both Nuevo Leon and Tamaulipas.
>>Those snakes evolved separate of "leonis" and then mixed with them at a later date in the Canyons and Valleys that connect east /west. West of Santa Rosa Canyon you can see some mixing going on. Not all the MSP are perfect annulata mimics and a lot of them are what we call intermediates in that area. "Leonis" IMO evolved directly from mex mex in the geographic areas west of there trending from SE to NW and then mixed with that eastern flank snake in those east/west valleys/canyons.
Thanks Joe....Very interesting that the canyons/valleys isolate populations...Seems logical though.... ----- John Lassiter
"Poor planning and procrastination on your part does not constitute an emergency on my part....."
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