**Supplemental Material for Eliana Faria PhD dissertation**

Table S2. Matrix of the pairwise FST distances (bellow the diagonal) and significant FST p-values (above the diagonal) for the 46 sampled localities of

*Cnemidophorus ocellifer*.

Table S4. Climate and environmental values for each locality used to test genetic diversity in

*Cnemidophorus ocellifer*through linear regression or simultaneous autoregression analyses. Nucleotide diversity (π); niche suitability from current and Last Glacial Maximum (LGM, 21 kyr) periods; isothermality (Bio3), temperature seasonality (Bio4), minimum temperature of coldest month (Bio6), annual mean temperature (Bio1), annual precipitation (Bio12), net primary productivity (NPP), actual evapotranspiration (AET), topographic complexity (TC), and distance from center of origin (DCO). Letters after Bio3, Bio4 and Bio6 variables represent current (C) and LGM (L) climate conditions

Table S6. Matrix of the pairwise Euclidian distances for the 46 sampled localities of

*Cnemidophorus ocellifer*.

Table S7. Matrix of the pairwise connectivity distance for the 46 sampled localities of

*Cnemidophorus ocellifer*based on its current niche suitability.

Table S8. Matrix of the pairwise connectivity distance for the 46 sampled localities of

*Cnemidophorus ocellifer*based on its LGM niche suitability.

Table S9. Matrix of the pairwise connectivity distance for the 46 sampled localities of

*Cnemidophorus ocellifer*based on Caatinga main rivers.

Table S10. Matrix of the pairwise resistance distance for the 46 sampled localities of

*Cnemidophorus ocellifer*based on Caatinga slope gradient.

Table S11. Matrix of the pairwise resistance distance for the 46 sampled localities of

*Cnemidophorus ocellifer*based on Caatinga roughness gradient.