SURFACE ULTRASTRUCTURE OF HETEROPHYES HETEROPHYES (TREMATODA, HETEROPHYIDAE) COLLECTED FROM A MAN

Surface ultrastructure of Heterophyes heterophyes recovered from a man by treatment with praziquantel is reported. Whole surface of the body was covered with saw-toothed or alternatively brush-shaped tegumental spines with an average density of 42 per square micrometer. Sensory p apillae were not identified. The gonotyl was posterosinistal to the ve ntral sucker and was protruded in 28% flukes. The rodlets were arrange d radially along the gonotyl, occupying about 85% of the gonotyl circu mference. Rodlets were seen to be composed of 3 to 6 spines in a row a ppearing as ''cockscomb.''