Figure 4From: Comparative mitochondrial genomics of snakes: extraordinary substitution rate dynamics and functionality of the duplicate control regionHypotheses for the relative timing of alterations in mitochondrial genome architecture and molecular evolution throughout snake phylogeny. The topological relationships among snakes and branch lengths shown are the same as in Figure 3. Major groups of snakes are indicated along with the approximate diversification time of the Alethinophidia.Back to article page