Figure S1. Scattered plots for the categorical principal component analyses.

Figure S2. Pholidotic trait surfaces derived with the kriging interpolation method.

Figure S3. Spatial coherent probability groups maps derived with spatial analyses.

Table S1. Codes, types, description and ranges or states of morphological traits.

Table S2. Environmental factors used for spatial bivariate correlations.

Table S3. Total number of specimens, average and standard deviation for meristic traits.

Table S4. Number of specimens and frequencies for each state for qualitative traits.

Table S5. Statistical measures to assess the performance of the kriging interpolation of morphological traits.

Table S6. Spatial correlations of morphological trait surfaces, principal components and class probability groups with environmental variables.

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