Campeloma decisumCampeloma decisum, common name the pointed campeloma, is a species of freshwater snail with an operculum, an aquatic gastropod mollusc in the family Viviparidae.DescriptionCampeloma decisum can be found in freshwater ecosystems throughout eastern North America. The species is capable of both sexual reproduction and parthenogenesis. They typically reproduce when they're a year old, and live approximately three years. The species is sexually dimorphic.EcologyParasites of Campeloma decisum include trematode Aspidogaster conchicola.