Nystia is an extinct genus of fossil freshwater snails, aquatic gastropod molluscs in the family Truncatellidae.Kadolsky D. (1988). "Mollusken aus dem Oligozän von Sieblos a.d. Wasserkuppe/Rhön". Beitrage zur Naturkunde in Osthessen, Fulda, 24: 99-129. pages 103-105.
The genus Nystia was previously classified within the Stenothyridae or the Micromelaniidae. It is currently classified within the Truncatellidae according to Kadolsky (1988).
Distribution The distribution of the genus Nystia includes France and the Czech Republic.
Species Species in the genus Nystia include: Nystia duchasteli (Nyst, 1836) - synonym: Paludina duchasteli Nyst, 1836, type species, from Eocene of France Nystia lenoiri Nystia rubeschi PDF. image on page 57.
References
Further reading Klika B. (1891). Schlickum W. R. (1970). "Zur Gattung Nystia Tounouer". Archiv für Molluskenkunde 100(5-6): 291–293.