Areas of endemism detected by PAE (left map) based on the distribution of the lizard genus Tropidurus employing 5°×5° quadrats as operational geographic units [45].

The area of endemism located within the Quadrat 24 (enlarged in Figure 4) comprises the Noel Kempf Mercado National Park (including the Serranía de Huanchaca) and El Refugio Biological Station, in the Department of Santa Cruz, eastern Bolivia, and was supported by the occurrence of T. callathelys (yellow star), T. chromatops (red triangles), and T. xanthochilus (black cross). The area of endemism located within the Quadrat 28 (enlarged) comprises the southern portion of the Caatinga province, northeastern Brazil, and was supported by the endemics T. erythrocephalus (yellow dots), T. mucujensis (orange dot), and T. psammonastes (white dots).