Material collected from the Ko Mountain (southern part of Khabarovsk Prov.) revealed 58

spider morphospecies. It was found that Ko Mt. is the northernmost locality for 4 species, earlier known only from the Maritime Province and is the northern limit of distribution for the Cybaeidae in continental Asia. In addition the studied locality is the southern limit of distribution for 8 species and one genus (Tanasevitchia Marusik et Saaristo, 1999). Six species, one genus (Cybaeus L. Koch, 1868) and one family (Cybaeidae) are new to the province. Four species are new to science and will be described in revisional works