The pulmonate genera and genes analyzed under the maximum likelihood approach inference of adaptive evolution using PAML.

*PAML analyses performed both on multiple species and on a single species (multiple populations per species).
**PAML analyses performed separately on single species of the genus (multiple populations per species).
@The two datasets of Albinaria in COX1 include different species.
Length of sequences is given in base pairs (bp). The datasets that were subjected to the McDonald-Kreitman test are indicated with Y. Accession numbers are provided for sequence data generated for this study, and for sequence data available in GenBank but not published.