Morphology, ultrastructure, genetics, and morphometrics of Diplostomum sp. (Digenea: Diplostomidae) metacercariae infecting the European flounder, Platichthys flesus (L.) (Teleostei: Pleuronectidae), off the northwest coast of Portugal - Cavaleiro, F.I.; Pina, S.; Russell-Pinto, F.; Rodrigues, P.; Formigo, N.E.; Gibson, D.I.; Santos, M.J. (Parasitology Research, 2012)