Fig. 1From: Evolutionary analysis of mitochondrially encoded proteins of toad-headed lizards, Phrynocephalus, along an altitudinal gradientMap showing sites from which Phrynocephalus were sampled. All species/specimen numbers shown on the map correspond to Additional file 1 (map data were provided by the Scientific Data Centre of the Chinese Academy of Sciences and the final map produced by the authors using the software ArcGis 10.2)Back to article page