Fig. 3
A schematic diagram showing the current hypothetical evolutionary phylogeny for Varanids with chromosome changes indicated, suggesting independent chromosome transition in parallel in several lineages. Arrows indicate nodes of chromosome transitions for both pericentric inversions of autosomes and gain or loss of W chromosome heteromorphisms. The enlarged microchromosome (EM) was likely acquired prior to divergence between V. citrinus and V. acanthurus and was subsequently lost in some populations of V. acanthurus or could be present at a very low frequency in those populations. The phylogenetic relationships of varanus species are based on66.
