''Marstoniopsis'' is a

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nom ...

of minute freshwater snails with a

gill A gill () is a respiratory organ that many aquatic organisms use to extract dissolved oxygen from water and to excrete carbon dioxide. The gills of some species, such as hermit crabs, have adapted to allow respiration on land provided they are ...

and an operculum, aquatic gastropod

mollusk Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is e ...

s or micromollusks in the family

Amnicolidae Amnicolidae is a family of small freshwater snails with a gill and an operculum, aquatic gastropod mollusks in the superfamily Rissooidea. This family is in the clade Littorinimorpha (according to the taxonomy of the Gastropoda by Bouchet & ...

Species

Species within the genus ''Marstoniopsis'' include: * '' Marstoniopsis armoricana'' (Paladilhe, 1869) * '' Marstoniopsis croatica'' Schütt, 1974 * '' Marstoniopsis graeca'' (Radoman, 1978) * ''

Marstoniopsis insubrica ''Marstoniopsis insubrica'' is a species of minute freshwater snail with an operculum, an aquatic gastropod mollusk or micromollusk in the family Amnicolidae. This is a critically endangered species. Distribution This species lives in some ...

'' (Küster, 1853) - synonym: ''Marstoniopsis scholtzi'' (Schmidt, 1856) * '' Marstoniopsis vrbasi'' Bole & Velkovrh, 1987

References

External links

Amnicolidae {{Amnicolidae-stub