Figure 1: Scanning electron micrographs of an untreated control R. echinobothrida. A. The strobila composed of a series of proglottids with apical scolex (bar = 20 μm). B. A sucker with its marginal rim of rows of spines (bar = 2 μm). C. The finely pointed layers of spines surrounding the sucker (bar = 20 μm). D. Cascades of ciliary microtriches on the tegument of the proglottid (bar = 2 μm).