Abstract
Four populations of Mesostoma lingua from various geographical areas react in different ways according to certain environmental factors. The determination of the two eggtypes is particularly influenced by temperature changes and a crowding effect. The influence of other factors is of little consequence.
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Heitkamp, U. Die mechanismen der subitan- und dauereibildung bei Mesostoma lingua (Abildgaard, 1789) (Turbellaria, Neorhabdocoela). Z. Morph. Tiere 71, 203–289 (1972). https://doi.org/10.1007/BF00280167
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DOI: https://doi.org/10.1007/BF00280167