Lymnaeoidae

Lymnaeoidae is a superfamily of freshwater snails, belonging to the order Lymnaeida. These snails are characterized by their spirally coiled shells, which are typically sinistral, meaning they coil to the left. However, some species can exhibit dextral coiling. Lymnaeoidae are found in a wide variety of freshwater habitats, including lakes, ponds, rivers, and streams, across the globe.

The diet of these snails generally consists of algae, plant matter, and detritus. They play an important role in freshwater ecosystems as herbivores and detritivores, contributing to nutrient cycling. A significant aspect of Lymnaeoidae is their role as intermediate hosts for various parasitic flatworms, particularly those of the genus Schistosoma, which cause schistosomiasis in humans and animals.

Key families within the Lymnaeoidae superfamily include Lymnaeidae, Physidae, and Planorbidae. Lymnaeidae, the pond snails, are widespread and often have thin, elongated shells. Physidae, the bladder snails, are known for their translucent shells and often inhabit weedy areas. Planorbidae, the ramshorn snails, are distinguished by their flattened, coiled shells that resemble a ram's horn. The study of Lymnaeoidae is important for understanding freshwater biodiversity, ecological interactions, and public health due to their parasitic connections.