Geographic distribution of Rhinella marina and R. schneideri, and sampling localities. (A) Species distribution area . (B) Sampling localities coded as in Additional file 1. White and black circles represent sample localities of R. marina from Left Amazon river bank (LAB) and Right Amazon river bank (RAB), respectively, and gray circles correspond to sample localities of R. schneideri. The map was designed using DIVA-GIS . Gray layer is the land cover according to the tree cover, broadleaved, and evergreen option.
Sequeira et al. BMC Evolutionary Biology 2011 11:264 doi:10.1186/1471-2148-11-264