Figure 4. Taxon-independent association of distributions between sinistral land snails and pareatid snakes.

Each bar indicates the proportion of genera composed of sinistral (a) flat-shelled and (b) tall-shelled species. Closed and open bars indicate the proportions within and outside the range of pareatid snakes, respectively. Family names are denoted by the following abbreviations; Ariophantidae (Ar), Bradybaenidae (Br), Camaenidae (Ca), Chondrinidae (Ch), Corillidae (Co), Enidae (En), Dyakidae (Dy), Pupillidae (Pu), Subulinidae (Su), Tornatellinidae (To) and Vertiginidae (Ve). Families distributed across both ranges are shown. The number above each bar indicates the number of genera included in each family.