| life history of pygidiopsis crassus n. sp. (trematoda, digenea, heterophyidae) in the neotropical region. | the life cycle of pygidiopsis crassus n. sp. was experimentally reproduced, starting from cercariae from naturally infected littoridina parchappei collected from lujan river and different ponds in buenos aires province, argentina. metacercariae were found encysted in the body cavity of experimentally and naturally infected fishes cnesterodon decemmaculatus and naturally infected jenynsia lineata. adults were obtained experimentally in chicks and mice. the natural host is unknown. the new species ... | 1995 | 8524075 |