Hi All.
Hummmm.  I wonder if in effect the Andes cold temperatures have had any
influence in this trend.  That would be very significant for the theory of
their trajectory in North America.  Would "colder" climatic conditions in fact
limit their norwarth progression?  Some years back I read an article about
"Africanized" bees that had been submitted to laboratory enhanced cold
environments and survived. (I do not have the reference on hand but I am sure
that I have filed away with other reference material). According to Brother
Adams,  African bees crossed the Pyrenees and evolved into the now existing
European races of bees. What other factors are there in the Southern hemisphere
to negate a similar occurrence there?   If in fact, degree of coldness alone is
the limiting factor,  the earlier assumptions of territorial limitations would
prove true.
Thoughts, any one?
Best regards.
Dr. Rodriguez
Virginia Beach, VA