[Description of a new species of Proteocephalus pronini sp.n. (Cestoda: proteocephalidae)--a parasite of grayling from lake Hovsgol].

A new cestode species, Proteocephalus pronini sp. n., is described from the Lake Hovsgol Grayling Thymallus arcticus nigrescens (Mongolia, Hovsgol Lake). The new species differs from P. thymalli from the Baikal Lake by the length of strobile, number of proglottids, form of mature proglottids, and number of diverticles of uterus.