1. The operculum serves some of the same functions as an epiphragm . 2. This kind of epiphragm is very strong and may be difficult to break. 3. A mucus epiphragm is usually transparent or translucent, and is fairly elastic. 4. A white convex epiphragm is created for aestivation. 5. Young specimens have a coarsely tomentose epiphragm ( membranous cover ) that soon disappears. 6. The main function of the epiphragm is to reduce water loss through the aperture during inactivity. 7. The epiphragm helps the snail retain moisture and protects it from small predators such as some ants. 8. The epiphragm may be distinguished from the true operculum by its homogeneity and want of growth marks. 9. In a few species the epiphragm is thick and quite rigid, being reinforced with calcium carbonate. 10. As the fruiting body matures and the fruiting body expands, the epiphragm ruptures, exposing the internal contents.
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