In the genus Tragopogon (a plant genus consisting mostly of diploids), two new species (T. mirus and T. miscellus) have evolved within the past 50-60 years. The new species are allopolyploid descendants of two separate diploid parent species.
Here is how this speciation occurred. The new species were formed when one diploid species fertilised a different diploid species and produced a tetraploid offspring. This tetraploid offspring could not fertilize or be fertilised by either of its two parent species types. It is reproductively isolated, the very definition of a species.
All due repect but you are completely and utterly wrong. Better luck next time.