tetraedrisellä

Tetraedrisella is a genus of small, freshwater snails with a gill and an operculum, an external shell. It is a member of the family Hydrobiidae, which includes many other small freshwater snails. The genus was first described by the German malacologist Georg Karl Wilhelm Ludwig Kobelt in 1878.

Tetraedrisella species are typically found in slow-moving or stagnant freshwater habitats, such as ponds, lakes, and slow-moving rivers. They are known for their distinctive shell shape, which is typically elongated and conical, with a smooth surface and a prominent spire. The shell is usually a light brown or yellowish color, with a darker band around the middle.

The genus includes several species, including Tetraedrisella balthica, Tetraedrisella borysthenica, and Tetraedrisella hungarica. These species are similar in appearance, but can be distinguished by subtle differences in shell shape and coloration.

Tetraedrisella species are herbivorous, feeding on algae and other plant material. They are an important part of the freshwater food web, providing food for larger predators such as fish and birds.

Tetraedrisella species are not considered to be threatened, but their populations can be affected by changes in water quality and habitat loss. Conservation efforts are focused on protecting their habitats and maintaining water quality.