Dirbtini

Dirbtini is a group of small, semi-aquatic gastropods belonging to the family Dirbtonidae. The name derives from the ancient local language of the Dirbn region where the species was first described. Members of this family are characterized by a shell that is rounded at the apex and a spiral aperture. They typically range from 2 to 5 centimeters in width, with a coloration that varies from pale green to dark brown depending on their habitat. The soft body is soft and elongated, and many species exhibit a distinctive mantle that secretes a strong adhesive for attachment to rocks or vegetation.

The Dirbtini are found primarily in the freshwater streams and marshes of the Dirbn basin in the southeastern part of the continent. They prefer slow-moving water with abundant aquatic vegetation, and they are most commonly located in shallow, low-oxygen environments. Their feeding behavior is herbivorous, grazing on periphyton and detritus. During breeding, Dirbtini release planktonic larvae into the water column, which later settle on suitable substrate and develop into juvenile snails. Predators include small fish, amphibians, and certain insects, while their shells provide some protection against larger predators.

Ecologically, Dirbtini play a significant role in maintaining freshwater ecosystems. They contribute to the breakdown and recycling of organic material and serve as a food source for a variety of aquatic organisms. Their shells can serve as a substrate for epiphytes, thereby enhancing local biodiversity. Populations of Dirbtini are stable in most habitats, though local declines have been recorded in areas where water pollution and habitat modification are prevalent. Conservation of freshwater habitats is essential for preserving the ecological functions performed by these gastropods.