Four million years ago, a river changed course and cut through the center of the forest creating two geographically isolated forests of equal size, Forest X and Forest Z. It divided the population of each species (1, 2, and 3) equally between the forests, where each population eventually evolved to become a new species. Currently, there are a total of six lizard species living in the two forests: species 4, 5, and 6, located in the north, central, and southern regions respectively, in Forest X; and species 7, 8, and 9, located in the north, central, and southern regions respectively, in Forest Z. Based on this information, what is the most likely phylogeny for the six living lizard species