Abstract
Neotropical freshwater stingrays of the family Potamotrygonidae (Chondrichthyes: Myliobatiformes) represent the only family of elasmobranchs entirely restricted to freshwater habitats of South America. Like their marine relatives, they are infected with metazoan parasites, including many species of cestodes that use elasmobranchs as definitive hosts (e.g., Tetraphyllidea, Rhinebothriidea …