[Proteocephalus exiguus (Cestoda) as a parasite of Salmo gairdneri (Pisces)].

Proteocephalus exiguus (Cestoda) as a parasite of Salmo gairdneri (Pisces). The cestode species Proteocephalus exiguus LA RUE, 1911, not found in Salmo gairdneri until now, is recorded from this host for the first time in the G.D.R. This species is described in detail and differentiated from P. neglectus. In addition to a list of findings from the lake Wolziger See in the south of Berlin, data on the incidence (up to 100% in our material) and the intensity of invasion (up to 40 helminths per fish) as well as on pathogenicity and therapy are given. Problems of species determination in the genus Proteocephalus, especially from Salmonidae and Coregonidae, and the distribution and bionomy of P. exiguus are discussed.