Belgrandiella parreyssii

Belgrandiella parreyssi is a species of small freshwater snail with a gill and an operculum, an aquatic gastropod mollusk in the family Hydrobiidae. This species is endemic to Austria where it is found only in one thermal spring at Bad Voeslau, south of Vienna. Due to man made changes of the habitat the population has been decreasing rapidly since the 1970s.

Belgrandiella parreyssii
Conservation status
Critically Endangered  (IUCN 3.1)[1]
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Caenogastropoda
Order:	Littorinimorpha
Family:	Hydrobiidae
Genus:	Belgrandiella
Species:	B. parreyssii
Binomial name
Belgrandiella parreyssii (Pfeiffer, 1841)
Synonyms
Belgrandiella parreyssi (Pfeiffer, 1841) [orth. error] Bythinella parreissii Pfeiffer, 1841 Paludinella parreyssii Pfeiffer, 1841 Paludina parreyssii Pfeiffer, 1841