Oncomelania Hupensis Nosophora Shell
''Oncomelania'' is a genus of very small tropical freshwater snails, aquatic gastropod mollusks in the family Pomatiopsidae. These ''Oncomelania'' snails are distantly related to the marine periwinkle, and more closely related to the small marine snails of the family Rissoidae. Species There are twoKameda Y. & Kato M. (2011). "Terrestrial invasion of pomatiopsid gastropods in the heavy-snow region of the Japanese Archipelago". ''BMC Evolutionary Biology'' 11: 118. . species in the genus ''Oncomelania'': * ''Oncomelania hupensis'' Gredler, 1881 - type species, this polytypic species has a number of subspecies * ''Oncomelania minima'' P. Bartsch, 1936 Woodruff et al. (1999) recognized also the following species: * ''Oncomelania lindoensis'' Davis & Carney, 1973 - from Lake Lindu (Lore Lindu National Park), Sulawesi Japanese Red List Data Book (2006) recognizes also the following additional species: * ''Oncomelania shini'' - as Vulnerable species in Japan * ''Oncomelania saku ...
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Oncomelania Hupensis
''Oncomelania hupensis'' is a species of very small tropical freshwater snail, an aquatic gastropod mollusk in the family Pomatiopsidae. Distribution ''Oncomelania hupensis'' has been found in China, Taiwan, and also in Japan, the Philippines, and on the Indonesian island of Sulawesi. Description Over the past a few decades, the taxonomy of ''Oncomelania hupensis'' has been a dispute due to the variation in morphological characters such as shell sculpture, operculum etc. Phenotypically, ''Oncomelania hupensis'' can be separated into ribbed- and smooth- shelled morphotypes. In China, the typical morphotype of ''Oncomelania hupensis'' is ribbed-shelled, and its distribution is restricted to Yangtze River basin. Smooth-shelled snails are also distributed in mainland China, but are considered the same species and subspecies of ''Oncomelania hupensis''. ''Oncomelania hupensis'' reported in other Far East countries are smooth-shelled, and have been considered either as su ...
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