There is disagreement about the evolution of those fungi. It does not appear to be as cut and dry as often presented. https://www.pnas.org/content/113/9/2442 h

There is disagreement about the evolution of those fungi. It does not appear to be as cut and dry as often presented. https://www.pnas.org/content/113/9/2442 https://www.pnas.org/content/113/9/2442 Evolution of new species may not be necessary to survive all environmental changes, and not all speciations are similar in terms of genetic difference. Coyotes can still breed with wolves and dogs.