Abstract
AbstractUrocystis proliferVillot, 1880 is an intestinal parasite ofSorexspp. In the Palaearctic. There are significant differences in the descriptions of both adults and stages of ontogenesis ofU.proliferas described by various authors. The experimental infection of intermediate hosts with cestodes has been conducted. An overview of the geographical distribution, infestation of the definitive hosts and the development of the metacestode stages ofU.proliferare presented. The cestode is characterized by an extensive geographic area in the Palaearctic, wide host specificity and very high rates of infection of its definitive host.Urocystis proliferhas been recorded mostly in the taiga and forest zones of Palaearctic. Fourteen species ofSorexwere registered as the definitive host. Redescription ofU.proliferand an amended generic diagnosis are provided. A complete description of the ontogeny from oncosphere to fully developed metacestode is given. Features of development of the metacestode are an asexual larval reproduction, the absence of the anterior and posterior obturator valve in the cyst of the fully developed urocyst, as well as excretory bodies.
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