Snails show their true colours: rate of evolutionary divergence in the shell colour polymorphism of Cepaea nemoralis
The shell colour polymorphism in the land snail Cepaea nemoralis is maintained by environmentally variable light intensity and predation. Previous work showed that divergence in colour polymorphism between habitat pairs of open and closed areas increased with age of the habitat. However, that study was limited to a time span of 80 years (27 snail generations). Here, we investigate shell colour…
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