Image of Echinochasmus pelecani; a. Drawing of cercaria structure b. Cercaria stained with 0.5% neutral red c. Redia stained with 0.5% neutral red d.–g. Images of Scanning Electronmicroscope Abbreviations: os – oral sucker, cs – collar spine, p – pharynx, in – intestine, vs – ventral sucker, mct – main collecting tube, ta – tail, re – redia, c – cercaria (scale a, b = 50 µm, c = 10 µm).