immediately preceded by starts_at_end_of occurrent cercarium schistosomulum worm_development WBls:0000709 2016-08-16T07:46:43Z A tailless cercarium of Schistosoma sp, which resides in the definitive host. After penetration and spending a few days in the skin, schistosomula migrate to the lungs and enter the systemic circulation and are carried to the mesenteric vein of the host where they mature into adult schistosomes. jl16 somule Digenean life stage