Ultrastructure of the secondary osmoregulatory canals in the scolex and neck region of Silurotaenia siluri (Batsch, 1786) (Cestoda: Proteocephalidae)

Abstract

Abstract. The secondary osmoregulatory canals in the scolex and neck region of Silurotaenia siluri, a parasite of the catfish Silurus glanis (L.), terminate below the tegument basal plasma membrane. The basal plasma membrane of the osmoregulatory canal syncytium is in tight contact with the tegument basal plasma membrane.

Biology and Systematics of Echinococcus

“…Although rostellar secretions have been described in larval Taenia crassiceps (Krasnoshchekov and Pluzhnnikov, 1981), no gland has been described. Rostellar glands have been described in other adult cestodes, particularly proteocephalids but their function is also unclear and structurally they are different to the rostellar gland in Echinococcus (McCullough and Fairweather, 1989;Zd'arska and Nebesarova, 2003). Modified glandular parts of the scolex tegument have been described in some other cestodes and the most-favoured role for their secretions is one of attachment (Hayunga, 1979;Ohman-James, 1973;Richards and Arme, 1981;Sawada, 1973;Specian and Lumsden, 1981).…”