Partnogenetic development Metagonimus yokogawai (Katsurada, 1912)
Objective of research: The study of Semisulcospiro cancellata, the first intermediate host of Metagonimus yokogawai (Katsurada, 1912) on the territory of the Amur region. Materials and methods: The following methods were used in the present paper: 1. Examination of the mollusk's liver for the presence of trematode larvae was conducted. Development of parthenogenetic generation of the parasite from generic cells up to the release of cercaria was observed. 2. Intensity of parasitic infection in mollusk's liver was studied. Results and discussion: The structure of M. yokogawai rediae and formation of partenites in the liver of mollusk S. cancellata were described.