At present, the fauna of Pimplinae of Vietnam comprises 122 species in two tribes, 21 genera, of those many are newly recorded and described species from the country's fauna. In terms of geographical distribution, most species of Pimplinae occur in the northwestern region (74 species). The species richness of Pimplinae in the South Central and Central Highlands (55 species) and in the North Central region (50 species) is higher than in the South Vietnam (40 species) and in the northeastern region (39 species). The northwestern and South Central and Central Highland regions have the highest level of endemicity (29.7 percent and 32.7 percent of the total species number known from these regions. respectively). These regions also harbor the highest level of new discoveries of Pimplinae in Vietnam. with 20 and 16 newly described species. The similarity of species compositions between the northeastern and northwestern regions, between the North Central Vietnam and the South Vietnam are closer than those of other regions. Concerning to the altitudinal distribution, the species diversity decreases at higher elevations. Ninety species were recorded at the elevation below 700m a.s.I, while there were 47 species found at the elevation between 700 and 1100m and only 27 species were found at the elevation 1100m a.s.l.
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