Figure 1
From: Gene flow persists millions of years after speciation in Heliconiusbutterflies
Bayesian phylogeny showing the relationship between the distantly-related silvaniform and melpomene / cydno clades of the genus Heliconius. Posterior probabilities for three major nodes are shown (1.0), as are the wing pattern phenotypes for the four analyzed species. The age of the split between the melpomene/cydno and silvaniform clades was estimated assuming an evolutionary rate of 1.15% per lineage per million years [32].