Аннотация:Summary. The study found that the attachment organ of adult C. truncatus is false sucker, equipped with highly specialized muscles, modified from the somatic muscles of the strobila. In the study of the ultrastructure of the excretory system were found, such archaic features of the organization as: channel walls are formed by epithelial-muscle cells with nuclei, adjacent to the channel wall; and the terminal cells may contain two ciliate complex located in perpendicular planes.
The study of the microscopic anatomy of the nervous system greatly clarified the data obtained by previous authors, and showed the presence of 4 major neuropil in the basis of false sucker, connected by 2 pairs of dorsal and ventral commissures. Synaptic apparatus is described, which showed a high degree of development