Maximum likelihood (ML) trees based on the control region (CR), ND4, ND5 and cyt b sequences. The best-scoring maximum likelihood tree from partitioned ML analyses based on the CR (a), ND4 (b), ND5 (c) and cyt b (d) sequences of mtDNA. Numbers above the internal branches indicate neighbour-joining and ML bootstrap (BS) values and Bayesian (BI) posterior probabilities. The BS and BI values are given only for the nodes of major clades. Haplotypes observed in triploids are shaded. Haplotypes shared between diploids and triploids are shown in italic and shaded. Clade numbers I - VII correspond to those given in the NJ tree (Figure 2).