Finding Eggs of the Trematode Sp. (Trematoda, Echinochasmidae) in the North of Western Siberia in the Late Holocene

A parasitological analysis of 24 dog coprolite samples, 1 cultural deposit, and 4 dung samples obtained during excavations of the Mangazeya settlement (66°42’ N, 82°16’ E), the first Russian city of the 17th century (late Holocene) in the north of Western Siberia was performed. Helminth eggs were found in 26 (89.7%) samples. sp. eggs were found in 48.3% of the samples: in the cultural deposit, in 2 dung samples, and in 11 dog coprolite ones. This genus is currently absent in the helminth fauna of the region. It could have entered the region with infected dogs, pigs, and humans who arrived to the region from European Russia. The introduction of the helminth did not lead to the formation of a new stable natural focus of echinochasmosis, which is associated with the unfavorable climatic conditions of the region.