The non-marine molluscs of Vietnam are a part of the molluscan fauna of Vietnam (wildlife of Vietnam). A number of species of non-marine mollusks are found in the wild in Vietnam. There are good reasons to suppose that Vietnam, with a surface of 332,000 km2, a large variety of habitats, and many different limestone 'islands' that differ from each other in faunal composition, will have a rich diversity of terrestrial molluscs. Numerous non-marine mollusc species, including more than 850 species of land gastropods, have been described from the country but many others still await discovery and description. Freshwater gastropods Freshwater gastropods in Vietnam include: Neritidae Neritina violacea Ampullariidae Pila polita Pila conica Pila ampullacea Pomacea canaliculata Pomacea insularum (d'Orbigny, 1835) Viviparidae Cipangopaludina lecythoides Idiopoma umblicata Sinotaia aeruginosa Mekongia lithophaga Mekongia hainesiana Filopaludina sumatrensis Angulyagra polyzonata Angulyagra duchieri Angulyagra boettgeri Pachychilidae Adamietta housei Adamietta reevei Brotia annamita Brotia dautzenbergiana Brotia hoabinhensis Brotia swinhoei Sulcospira collyra Sulcospira dakrongensis Sulcospira hainanensis Sulcospira proteus Sulcospira quangtriensis Sulcospira tonkiniana Sulcospira touranensis Sulcospira vietnamensis Semisulcospira aubryana Paracrostoma paludiformis Paludomidae Paludomus messageri (Bavay & Dautzenberg, 1900) Potamididae (brackish water snails) Cerithidea sp. Thiaridae Melanoides tuberculata (O. F. Müller, 1774) Neoradina prasongi Sermyla requetii - synonym: Sermyla tornatela Tarebia granifera (Lamarck, 1822) Thiara scabra Assimineidae Assiminea brevicula Assiminea francoisi Assiminea interrupta Assiminea obtusa Assiminea lutea Bithyniidae Digoniostoma siamensis Parafossarulus striatulus - synonym: Parafossarulus manchouricus Alocinma longicornis Bithynia misella Bithynia fuchsiana Bithynia goniomphalos Wattebledia crosseana Pomatiopsidae Neoprososthenia levayi - synonym: Paraprososthenia levayi Lacunopsis harmandi Tricula ovata Tricula similunaris Vietricula - 11 species Stenothyridae Stenothyra divalis Stenothyra messageri Stenothyra monilifera Stenothyra polita Stenothyra cyrtochila Stenothyra ovata Stenothyra conica Stenothyra alba Stenothyra schlickumi Brandt, 1968 Iravadiidae (marine/brackish) Fluvicingula elegantula (A. Adams, 1861) Iravadia cochinchinensis (Bavay & Dautzenberg, 1910) Iravadia ornata Blanford, 1867 Iravadia quadrasi (O. Boettger, 1893) Iravadia rohdei (Brandt, 1968) Pseudomerelina mahimensis (Melvill, 1893) Hyala sp. Buccinidae Clea helena (Meder in Philippi, 1847) Lymnaeidae Austropeplea viridis (Quoy & Gaimard, 1832) Radix auricularia (Linnaeus, 1758) - synonym: Lymnaea swinhoei Radix rubiginosa (Michelin, 1831) Planorbidae Polypylis hemisphaerula (Benson, 1842) Gyraulus convexiusculus (Hutton, 1849) Land gastropods Land gastropods in Vietnam include: Cyclophoridae Chamalycaeus depressus (Bavay et Dautzenberg, 1912) Chamalycaeus fraterculus (Bavay et Dautzenberg, 1900) Chamalycaeus heudei (Bavay et Dautzenberg, 1900) Chamalycaeus paviei (Bavay et Dautzenberg, 1912) Dioryx compactus (Bavay et Dautzenberg, 1900) Dioryx messageri (Bavay et Dautzenberg, 1900) Dioryx vanbuensis (Bavay et Dautzenberg, 1900) Laotia christahemmenae Páll-Gergely, 2014 Cyclophorus affinis Theobald, 1858 Cyclophorus