| accacoelium contortum (trematoda: accacoeliidae) a trematode living as a monogenean: morphological and pathological implications. | accacoelium contortum (rudolphi, 1819) monticelli, 1893 is a frequent but poorly known trematode found on gills, pharynx and digestive tract of the ocean sunfish mola mola (l.). although the morphology of a. contortum agrees with that of a typical endoparasitic trematode, with two relatively small suckers and no large holdfasts, this parasite is normally ectoparasitic. the main objective of this paper is to explore this peculiar host-parasite relationship. | 2015 | 26471059 |