Definition
'Ancylus' is a genus of small, freshwater limpets. They are found clinging to rocks and plants in various freshwater habitats. These tiny snails have flattened, cap-shaped shells. Think of them as little freshwater shields. They graze on algae and detritus. They're essential for maintaining the health of freshwater ecosystems. They play a role in the decomposition of organic matter. The survival of 'Ancylus' is closely tied to water quality.