Overall and regional cox1 diversity.

n = number of samples sequenced; u = number of unique haplotypes found within the region; h = haplotype diversity ± standard deviation; ∏ = nucleotide diversity.*samples form laboratory passaged or pooled larval stages. For these samples individual worms were not treated as individual samples but instead each different haplotype found was treated as an individual sample.**For Zanzibar the whole data set of Webster et al. [25], was used and due to the high number of worms sampled and high diversity found, individual worms were treated as individual samples. This was also used in the analysis of the diversity overall and in the Indian Island region.***This included samples from Zanzibar, Madagascar, Mauritius and Mafia.