Metritega

Metritega is a genus of small, often brightly colored, freshwater snails with a gill and an operculum, an external shell. The genus is part of the family Lymnaeidae, which includes pond snails and their allies. Metritega species are typically found in freshwater habitats such as ponds, lakes, and slow-moving streams.

The genus was first described by the French zoologist Jean-Baptiste Lamarck in 1816. It is characterized by its smooth, rounded shell with a distinct, often colorful pattern. The shell is typically small, measuring around 10-20 millimeters in diameter. The operculum, or lid, is also distinctive, with a smooth, rounded edge.

Metritega species are hermaphroditic, meaning they have both male and female reproductive organs. They reproduce sexually, with the male transferring sperm to the female using a penis. The eggs are laid in a gelatinous mass, which is attached to a substrate such as a rock or plant.

Metritega species are of interest to scientists and hobbyists alike due to their unique appearance and behavior. They are often used in scientific research to study the biology and ecology of freshwater snails. In addition, they are popular among aquarium enthusiasts due to their vibrant colors and relatively easy care requirements.