Austria is land-locked and therefore it has no marine molluscs, only land and freshwater species.
[1] There are 443 species of non-marine molluscs living in Austria.
Of these, 426 species live in the wild, 60 of which are endemic to Austria.
At least 17 gastropod species live only as hothouse aliens in greenhouses, aquaria and terraria.
Neritidae Viviparidae Melanopsidae Hydrobiidae Amnicolidae Bithyniidae Valvatidae Acroloxidae Lymnaeidae Physidae Planorbidae Cochlostomatidae Pomatiidae Aciculidae Carychiidae Succineidae Cochlicopidae Orculidae Argnidae Strobilopsidae Valloniidae Pupillidae Pyramidulidae Chondrinidae Vertiginidae Enidae Clausiliidae Ferussaciidae Punctidae Discidae Pristilomatidae Euconulidae Gastrodontidae Oxychilidae Zonitidae Milacidae Limacidae Agriolimacidae Boettgerillidae Vitrinidae Arionidae Geomitridae Hygromiidae Bradybaenidae Helicodontidae Helicidae Margaritiferidae Unionidae Corbiculidae Sphaeriidae Dreissenidae Hothouse aliens in Austria include: Following species occur as aliens in natural hot springs: Lists of molluscs of surrounding countries: