title: Criteria for species determination in the 'revolutum' group of Echinostoma.
authors.affiliation: Department of Biology, Lafayette College, Easton, Pennsylvania 18042, USA. friedb@lafayette.edu
authors.forename: Bernard
authors.initials: B
authors.lastname: Fried
authors.forename: Rafael
authors.initials: R
authors.lastname: Toledo
mesh_terms: D000818:Animals; D004449:Echinostoma / Q000033:anatomy & histology / Q000145:classification*; D004451:Echinostomiasis / Q000469:parasitology*; D006790:Host-Parasite Interactions; D013045:Species Specificity