Appendix S1. Data on average BSI, climate and biogeographic structure for the African latitudinal bands.

Appendix S2. Correlations between the eleven environmental variables studied in this work.

Appendix S3. Regression coefficients for the environmental variables included in the stepwise regression models developed in this work (see Tables 3 and 4).

Appendix S4. Data set of taxonomic, geological and bibliographical references.

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