Phylogenetic relationships between southern Africa “Lacustricola” haplotypes, based on COI mitochondrial DNA sequences. Numbers left to the bar indicate posterior probability values and on the right are bootstrap support values from the maximum likelihood analysis. Asterisks indicate maximum values. Colours next to each species name correspond to the same colours as depicted in the distribution map (Figure 2). Abbreviations refer to the country where the specimens were collected: ANG = Angola, BOT = Botswana, BUR = Burundi, DRC = Democratic Republic of Congo, NAM = Namibia, MAL = Malawi, MOZ = Mozambique, RSA = Republic of South Africa, ZAM = Zambia.