There are 159 species of non-marine molluscs living in the wild in Latvia. In addition there are at least 9 gastropod species living only in as hothouse aliens in greenhouses, aquaria and terraria. There are 129 species of gastropods, 43 species of freshwater gastropods, 86 species of land gastropods and 30 species of bivalves living in the wild. Summary table of number of species (Summary table is based on species counted in this list and include also those ones with question marks) Systematic list The list is divided into freshwater and land species and then arranged in zoological order. The list is complete. Freshwater gastropods Species of non-marine gastropods in Latvia include: Neritidae Theodoxus fluviatilis (Linnaeus, 1758) Viviparidae Viviparus viviparus (Millet, 1813) Viviparus contectus (Linnaeus, 1758) Hydrobiidae Hydrobia ulvae (Pennant, 1777) Hydrobia stagnalis (Baster, 1765) Potamopyrgus antipodarum (Gray, 1843) Marstoniopsis scholtzi (A. Schmidt, 1856) Lithoglyphidae Lithoglyphus naticoides C. Pfeiffer, 1828 Bithyniidae Bithynia tentaculata (Linnaeus, 1758) Bithynia leachii (Sheppard, 1823) Valvatidae Valvata cristata O. F. Müller, 1774 Valvata pulchella Studer, 1820 Valvata piscinalis (O. F. Müller, 1774) Acroloxidae Acroloxus lacustris (Linnaeus, 1758) Lymnaeidae Galba truncatula (O. F. Müller, 1774) Stagnicola palustris (O. F. Müller, 1774) Stagnicola fuscus (C. Pfeiffer, 1821) Stagnicola corvus (Gmelin, 1791) Radix auricularia (Linnaeus, 1758) Radix ampla (Hartmann, 1821) Radix peregra (O. F. Müller, 1774) Radix balthica (Linnaeus, 1758) Myxas glutinosa (O. F. Müller, 1774) Lymnaea stagnalis (Linnaeus, 1758) Physidae Aplexa hypnorum (Linnaeus, 1758) Physa fontinalis (Linnaeus, 1758) Planorbidae Planorbarius corneus (Linnaeus, 1758) Planorbis planorbis (Linnaeus, 1758) Planorbis carinatus O. F. Müller, 1774 Anisus spirorbis (Linnaeus, 1758) Anisus leucostoma (Millet, 1813) Anisus vortex (Linnaeus, 1758) Anisus vorticulus (Troschel, 1834) Bathyomphalus contortus (Linnaeus, 1758) Gyraulus albus (O. F. Müller, 1774) Gyraulus acronicus (A. Fėrussak, 1807) Gyraulus laevis (Alder, 1838) Gyraulus riparius (Westerlund, 1865) Gyraulus rossmaessleri (Auerswald, 1851) Gyraulus crista (Linnaeus, 1758) Hippeutis complanatus (Linnaeus, 1758) Segmentina nitida (O. F. Müller, 1774) Ancylus fluviatilis O. F. Müller, 1774 Land gastropods Aciculidae Platyla polita (Hartmann, 1840) Ellobiidae Carychium minimum (O. F. Müller, 1774) Carychium tridentatum (Risso, 1826) Cochlicopidae Cochlicopa lubrica (O. F. Müller, 1774) Cochlicopa lubricella (Porro, 1838) Cochlicopa nitens (Gallenstein, 1848) Lauriidae Lauria cylindracea (Da Costa, 1778) Pupillidae Pupilla muscorum (Linnaeus, 1758) Valloniidae Vallonia costata (O. F. Müller, 1774) Vallonia pulchella (O. F. Müller, 1774) Vallonia excentrica Sterki, 1893 Acanthinula aculeata (O. F. Müller, 1774) Spermodea lamellata (Jeffreys, 1830) Vertiginidae Columella edentula (Draparnaud, 1805) Columella aspera Waldėn, 1966 Truncatellina cylindrica