The neighbour-joining (NJ) tree of 72 MGF haplotypes. The numbers below the species names are the bootstrap proportions (BS) and the Bayesian posterior probabilities (PP) for the monophyly of that species. Only values of BS ≧ 50% or PP ≧ 0.50 are presented. Haplotypes that have been inferred to have been transfer across a species barrier or to be shared between species are highlighted with the colour pie charts. The relative sizes of the pie charts are proportional to the number of sequences within each haplotype. The evolutionary distances were computed using the maximum composite likelihood method and are in the units of the number of base substitutions per site.