Subfamily
Assimineinae
Angustassiminea californica. Photo: (c) Ken-ichi Ueda, some rights reserved (CC BY)
Assimineidae is a family of minute snails with an operculum, gastropod mollusks or micromollusks in the superfamily Rissoidae. Many of these very small snails live in intermediate habitats, being amphibious between saltwater and land; others live in freshwater.