Ohenemisella

Ohenemisella is a genus of small, freshwater snails with a gill and an operculum, an internal shell that covers the aperture of the shell. The genus is endemic to the island of Madagascar, and its members are known for their distinctive shell shapes and color patterns. The shells are typically small, ranging from 2 to 4 millimeters in length, and are often translucent with intricate patterns of coloration.

The genus Ohenemisella was first described by the French malacologist Jean-Baptiste Lamarck in 1816. It is part of the family Hydrobiidae, which includes many other freshwater snail species. The genus is characterized by its small size, the presence of a gill, and the absence of a radula, the rasping tongue used for feeding in most other gastropod mollusks.

The species within the genus Ohenemisella are often found in temporary pools and other small bodies of water. They are herbivorous, feeding on algae and other plant material. The genus is of particular interest to scientists studying the evolution of freshwater mollusks, as it provides insights into the adaptations that have allowed these organisms to thrive in diverse aquatic environments.

Despite their small size and relatively simple biology, the species within the genus Ohenemisella play an important role in their ecosystems. They contribute to nutrient cycling and help maintain the health of their aquatic habitats. However, like many other freshwater species, they are threatened by habitat loss and pollution, making conservation efforts crucial for their long-term survival.