As the Centenario-Ratones basin does not support a significant number of individuals from this group, Criterion 3 is not triggered.Considering the characteristics of the area of analysis in terms of spatial heterogeneity, presence of ecotones, soil interfaces, connectivity and site of proven importance for adaptation to climate change, Criteria 4 and 5 would not be triggered.Potential elements triggering a critical habitat due to Criterion 2 are lizards of the Lialoemus genus.