FIGURE 2 in An extinct hummingbird species that never was: a cautionary tale about sampling issues in molecular phylogenetics

FIGURE 2. Correlation between genetic divergence (p and Tamura-Nei distances) based on the small fragment available for Heliangelus zusii (fragment) with divergence in complete sequences (ND2 gene) across 315 hummingbird taxa (McGuire et al. 2014 dataset). Genetic distances were calculated in MEGA6 (Tamura et al. 2013) and all positions with missing data were not considered when calculating pairwise genetic distances. The plot is cropped at 10% p-distance, thus providing a better view of the data spread in the area of low divergence relevant to the H. zusii issue. The correlation between the small fragment available for H. zusii and all the ND2 data is strong, and it is especially tight near the origin: 0% divergence in that small fragment essentially means no (or up to approximately 1%) divergence in the rest of the sequence. This suggests that our observation of identical sequences in H. zusii and A. kingii is not an artifact resulting from the small amount of available sequence data.