Fig. 3

Environmental influence in the species distribution analysis. a PCA of the influence of bioclimatic variables (1−19, according to WorldClim) on the biogeographic patterns within Bombus morio and B. pauloensis. Comp. 1: temperature seasonality, precipitation of wettest month, precipitation of driest month, and precipitation of coldest quarter (4, 17, 14 and 19, respectively); Comp. 2: maximum temperature of warmest month, mean temperature of warmest quarter, minimum temperature of coldest month, and mean temperature of driest quarter (5, 10, 6 and 9, respectively); b number of observations in relation to altitude in Bombus morio, B. pauloensis, and their internal clades. Lines represent the tendency of observations sum by species and are not consistent with the scale