Parasites of fish (Pisces) from Samara region. Report 1. Euglenozoa, Polymastigota, Protozoa, Microsporidia, Cnidaria, Ciliophora and Neomonada

The review of parasitic protozoa of fish from the Samara region is given. 121 species of parasites were recorded in 33 studied fish species. The host range, detection areas, invasion rates, and authors who found the parasite in the region are indicated. The history of parasitological studies of fish in the waters of the Samara region is considered. Species of Myxobilatidae (50 species), Trichodinidae (17) and Epistylidae (9) have the greatest distribution in fish. 4 species of parasitic protozoa (Eimeria cheni, Goussia sinensis, Myxobolus pavlovskii and Balantidium ctenopharyngodoni) are invader species from the Amur basin.