Monistoma

Monistoma is a genus of small, freshwater snails belonging to the family Planorbidae. These snails are characterized by their flattened, coiled shells, which are typically sinistral (left-coiled). The shell aperture is often partially covered by a thin, horny operculum. Monistoma species are commonly found in a variety of aquatic habitats, including ponds, lakes, and slow-moving streams, often preferring areas with submerged vegetation.

These snails are generally detritivores or algivores, feeding on decaying organic matter and algae found on submerged surfaces. Their reproductive strategy typically involves hermaphroditism, with individuals possessing both male and female reproductive organs. Eggs are usually laid in gelatinous masses. The genus Monistoma is distributed across various parts of the world, with specific species found in different geographic regions. While not as widely studied as some other freshwater snail families, Monistoma plays a role in its ecosystem as a consumer and prey item for other aquatic organisms. Further research is ongoing to understand the full ecological significance and diversity of this genus.