Oh, please document this claim. The term "species" is an arbitrary term. There is often debate as to where species should be split. If you know a foolproof test for determining where the species break is, please tell us more, because you seem to be the only one that knows about it.
The claim does not need to documented for those who understand DNA. You say it is wrong, Document that it is. The term species is only arbitrary for those who need it to be to give the faithful hope that evolution should not start with once upon a tiem and end with they lived happily ever after.
A single mutation causing a new species? How would that work? Mutations occur all the time, but it takes many mutations to make a new species.
I have never said or even suggested a single mutation would result in a new species. I have said mutations cannot result in a new species. The can only alter a characteristic that was in the gene pool of the parents and that time will not change proven scientific facts.
But here are examples of some actual speciation events:
Observed Instances of Speciation
The subject is mutations, not speciation. However speciation does not result in a change of species. Some in a species no longer being able to reproduce is not a new species. There are several reason they may lose that ability. In the salamander study, the salamanders remained salamanders and some of the could still mate and reproduce. I will also add the study was limited to 1 or 2 population and we can find salamanders of the same "kind" in many places.