Fig. 3

Phylogenetic distances and relaxed molecular-clock analysis of Laridae. (A) MDS (multidimensional scaling) plot of TREESPACE landscape analysis result among the species and each gene tree. “SPECIES” with red text indicates the mitogenome species tree. (B) Estimated divergence timelines of the Laridae family. Blue bar on each node indicates the 95% confidence interval of the estimated divergence time with “million years ago” unit, and the nodes with an asterisk indicate the fossil calibration points.