Figure 1 in The bumblebees of the subgenus Subterraneobombus: integrating evidence from morphology and DNA barcodes (Hymenoptera, Apidae, Bombus)

Figure 1. Estimate of phylogeny for eight of the 11 Subterraneobombus species (vouchers identified by PW) by Bayesian analysis of five genes (opsin, EF-1a, arginine kinase, PEPCK, and 16S) from Cameron et al. (2007), with divergence times estimated by Hines (2008) (the time scale is in millions of years before the present; values next to the nodes are Bayesian posterior probabilities/parsimony bootstrap values). Redrawn from Hines (2008).