John Machin (1967)
Structural adaptation for reducing water-loss in three species of terrestrial snail
Journal of Zoology, 152(1):55-65.
Laboratory measurements indicate that observed differences in the rate of water-loss from inactive Helix aspersa, Otala lactea and Sphincterochila boissieri are due to morphological adaptations such as a thicker shell, reduced aperture and thicker epiphragm. These modifications enable terrestrial snails to inhabit dryer environments by increasing the length of time the snail can remain inactive.
\_eprint: https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1469-7998.1967.tb01638.x
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