Figure 3

Linearized tree. It is based upon a 1047 bp segment of the mitochondrial ND2 gene applying the substitution model TrN+Γ [46]. After performing a branch length test [49], Neolamprologus leloupi was excluded from the analysis due to a significantly deviating rate of base substitution and subsequently added to the phylogeny according to the results of NJ, MP, ML and Bayesian analysis. The distance values in the scale below the phylogenetic tree correspond to the observed mean sequence divergence using the substitution model TrN+Γ.