moderoidulla

Moderoidulla is a genus of small, freshwater snails with a gill and an operculum, an external shell. It is an extinct genus of freshwater gastropod mollusks in the family Lymnaeidae. The genus Moderoidulla was described by Pilsbry in 1948. The type species of the genus is Moderoidulla modesta. The genus Moderoidulla is known from the Miocene epoch, which occurred between 23.03 and 5.333 million years ago. The genus is found in North America, specifically in the United States. The genus Moderoidulla is characterized by its small size, with the shell reaching a maximum length of 1.5 millimeters. The shell is thin and translucent, with a rounded shape. The genus Moderoidulla is a member of the superfamily Lymnaeoidea, which includes other freshwater snails such as the pond snail and the apple snail. The genus Moderoidulla is of interest to paleontologists and mollusk taxonomists due to its unique characteristics and the time period in which it lived.