Anhydridea

Anhydridea is a genus of small to medium-sized, terrestrial snails, terrestrial pulmonate gastropod mollusks in the family Achatinellidae. The genus was first described by the French zoologist Jean-Baptiste de Lamarck in 1822. The name "Anhydridea" is derived from the Greek words "anhydrous" meaning "without water" and "deos" meaning "god," reflecting the terrestrial nature of these snails.

Species within the genus Anhydridea are characterized by their smooth, glossy shells with a high spire and a wide aperture. They are typically found in arid and semi-arid regions, often in rocky or sandy habitats. Anhydridea species are known for their ability to survive in dry conditions, often entering a state of dormancy when moisture is scarce.

The genus includes several species, with the most well-known being Anhydridea granulosa, which is native to the southwestern United States and Mexico. Other species include Anhydridea luctuosa and Anhydridea pulchella, both of which are also found in the southwestern United States.

Anhydridea snails are herbivorous, feeding on a variety of plant materials. They play an important role in their ecosystems by helping to disperse plant seeds and by contributing to nutrient cycling. Despite their ecological importance, many species within the genus are threatened by habitat loss and other environmental factors. Conservation efforts are underway to protect these unique and fascinating snails.