GEOGRAPHICAL-DISTRIBUTION OF PHAGOCATA-VIVIDA IN THE FAR-EAST

Phagocata vivida (Ijima et Kaburaki, 1916) is common in cold-water hab itats in mountainous and hilly regions in Japan; in Northern Japan it occurs in lowland areas. Comparative studies of the material from Sout h Korea and Primorskiy in Northeast Siberia, Russia, show that Ph. viv ida is distributed widely in these geographic areas. Phagocata miyadii Okugawa, 1939, reported from North Korea and Northeastern China is a synonym of Ph. vivida. Geographical distribution of this species in th e Japanese Islands now becomes very clear. Judging by its geographical and vertical distributions, the species probably is a preglacial faun al element that entered Japan by the northern route to Old Honshu Isla nd along the coast of the Old Sea of Japan.