Fig. 4From: Detection of bluetongue virus in Culicoides spp. in southern Yunnan Province, ChinaPartial distributions of C. jacobsoni in map draft. Filled blue circles indicate the collection sites of the C. jacobsoni specimens used in the phylogenetic analysis. Estimated distribution regions of the major clades are highlighted in yellow and blue shading, respectively. The size of the circles are proportional to the sample numbers. See Fig. 3 for structure of clade (a1, a2)Back to article page