Turgidae
Turgidae is a family of freshwater snails belonging to the order Architaenioglossa. These gastropods are commonly found in freshwater environments, particularly in lakes, rivers, and ponds across various continents. Their shells are typically ovate or conical, exhibiting a range of colors from brown to yellow. A distinguishing feature of Turgidae is their operculum, a hard, often calcareous plate that seals the shell's opening when the snail retracts inside. This operculum provides protection against predators and desiccation. Members of this family are generally herbivorous or detritivorous, feeding on algae, decaying plant matter, and other organic debris found in their aquatic habitats. Reproduction in Turgidae is usually oviparous, with females laying clutches of eggs. Some species may exhibit internal fertilization. The family includes several genera, such as Viviparus and Campeloma, which are widely distributed. Turgidae play a role in their ecosystems as herbivores and as a food source for other aquatic organisms. Their presence and population dynamics can be indicators of water quality in freshwater systems.