Potamotrygonocotyle dromedarius is a species of monogenean parasites of Brazilian stingrays in which it infects the gills. Specifically, it infect four different species of stingray: Ocellate river stingray (Potamotrygon motoro), Bigtooth river stingray (P. henlei), Xingu River ray (P. leopoldi), and an unidentified species of Potamotrygon.