Minimum spanning network (a) for 23 sequences of cytochrome c oxidase I (COI) from males of Tettigettalna josei and the geographical distribution (b) of each haplotype. Numbers in the network correspond to the position of each mutation in the 581 base pairs sequences. Letters in the map for each sampled location are the same as in Table 4. Circle size is proportional to the number of specimens analysed (large = 3, medium = 2 and small = 1).