 The Venezuelan malacofauna marina not primarily distributed throughout the entire Venezuelan territory, but the greatest number of species and greater distribution has been reported for the river basin Orinoco.The vast majority of species usually live in areas calm water pipes or flooding of rivers and lakes.Many of the species usually have local distributions such as slugs and seven of leathers that often live primarily in the areas of cultivation in the north and the Andean region, However extend very widely distributed species that are can be located throughout the country as in the case of molluscs Ampullariidae amphibians and within the family which include Marisa cornuarietis, "Pomacea urceus" (Guarura), "Pomacea glauca", "Pomacea dolioides".