THE LIFE-CYCLE AND MORPHOLOGY OF SANGUINICOLA-INERMIS PLEHN, 1905 (DIGENEA, SANGUINICOLIDAE)

The life-cycle and morphology of Sanguinicola inermis in laboratory in fected common carp Cyprinus carpio and Lymnaea peregra at 20-degrees-C are described. Furcocercous cercariae develop from two generations of sporocysts within four to five weeks and directly infect a cyprinid d efinitive host. Post-penetration larvae migrate to the blood circulato ry system of the fish and mature into adults which release eggs into t he blood by 30 days post-exposure. Eggs reaching the gills mature and liberate miracidia within seven days. The miracidia emigrate through h ost tissue to the water. where they locate and penetrate a snail host. A detailed description of the developmental stages is given and the s urface structure of the cercaria. the oral muscular organ of the adult and the vitelline membrane of the egg are described for the first tim e.