Abstract
The study of nine populations of Pupilla muscorum (Gastropoda Pulmonata) collected in the pedological quaternary series of Achenheim (Alsace, France) and of two recent populations demonstrates the influence of the environmental conditions on the variability of this species. The chronological succession of the populations shows fluctuations of shape with many recurrences whereas a parallelism between a morphological griadent (affecting the height and the outline of the shells aperture) and a climatic gradient (temperate to cold) appears independently of the time. The morphological plasticity of Pupilla muscorum is supposed to be the result of ecophenotypical adaptations.
Published Version
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