Stenomelania juncea is a species of freshwater snail, an aquatic gastropod mollusk in the family Thiaridae.
The sister species of Stenomelania juncea is Stenomelania boninensis.Miura O., Mori H., Nakai S., Satake K., Sasaki T. & Chiba S. (2008). "Molecular evidence of the evolutionary origin of a Bonin Islands endemic, Stenomelania boninensis". Journal of Molluscan Studies 74(2): 199-202. .
Distribution The type locality is Taal Lake and small streams, Batangas, Luzon, Philippines.
Parasites Stenomelania juncea is the first intermediate host for the trematode Haplorchis taichui.Chai J.-Y., Shin E.-H., Lee S.-H. & Rim H.-J. (2009). "Foodborne Intestinal Flukes in Southeast Asia". The Korean Journal of Parasitology 47(Suppl): S69-S102. .
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