Ostracods (Crustacea): A new host for the Tetrahymena pyriformis complex (Ciliophora)

Ostracods are very old and small crustaceans that have a reduced body carrying several appendages, encapsulated by a carapace in the shape of two bilaterally symmetrical valves (Horne et al. 2002). Being highly adaptive to various ecological conditions, they occur in a wide range of freshwater habitats.