For a bacteria i am not sure the same concept of species applies as to sexually reproducing populations. Bacteria do swap plasmids sometimes which is sort of like sex. As far as a new species of bacteria look at the nylon digesting bacteria. A two base pair mutation on a plasmid that once coded for an enzyme that broke down esters, and now they have a enzyme that breaks down nylon, a synthetic substance invented by man.
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So in other words.... ya got bupkiss.
But thanks for the exchange, incredibly enlightening on the “fact” of evolution.