e-journal
Morphological and genetic differentiation of Eremina desertorum (Gastropoda, Pulmonata, Helicidae) in Egypt
A central goal of evolutionary biology is the understanding of the processes that result in morphological and genetic
diversity. Land snails were often used as model organisms for evaluating the roles of selection and history in the
origins of biodiversity (Davison 2002). In particular notable are the classical studies of Cepaea that nicely illustrated the action and effects of natural selection on shell phenotypes in the wild (Cain & Sheppard 1954). However, patterns of diversity are often difficult to detect and to understand if they are influenced by a host of historical and environmental factors in complex ecosystems (e.g. Fiorentino et al. 2008). Therefore, we have studied the morphological and genetic differentiation of the land snail Eremina desertorum (Forsskal, 1775) in a manageable ecosystem, the deserts of northern Egypt, which is dominated by a steep environmental gradient of decreasing precipitation and increasing temperature from the Mediterranean coast inland.
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