DAVIDIUS MONASTYRSKII SPEC. NOV., A NEW DRAGONFLY FROM NORTHERN VIETNAM (ANISOPTERA: GOMPHIDAE)

摘要

The male of the new sp, is described, illustrated and compared with the closely related D. fruhstorferi Martin Holotype male: Vietnam, Bac Can prov., Ba Be, IV-1997; deposited in Zoology Collection, Vietnam National University, Hanoi. Davidius is an Asian dragonfly genus with some 20 recognized species, distributed from the montane areas in north India and Nepal eastwards to northern Thailand, Indochina and to north-eastern China, Korea and Japan. The Chinese taxa have recently been treated and revised by CHAO (1990,1995) and CHAO & YANG (1995) and the Indian and Nepalese taxa by ASAHINA (1994).