[First record of Tetraonchus awakurai (Monogenea: Tetraonchidae) on gills of a lenok Brachymystax tumensis in Primor'e].
Drawings, description and size characteristics are given for Tetraonchus awakurai, which is registered for the first time from Brachymystax tumensis in the Ussury river (Primorye). The T. awakurai from the Ussury river differs from the typical forms living in water reservoirs of Japan by the measurements of external and internal lengths of anchors and copulatory complex.
D000818:Animals; D005618:Fresh Water / Q000469:parasitology; D005880:Gills / Q000469:parasitology; D012426:Russia; D012487:Salmonidae / Q000469:parasitology*; D014200:Trematoda / Q000033:anatomy & histology*