Phylogram of chelonian polystome species derived from the tree depicted in Figure 2 after collapsing haplotypes referring to the same species. Polystome species in blue refer to polystomes infecting the conjunctival sacs, in red the urinary bladder and in green the oral cavity of American turtles. Polystomatidae sp1 and sp2, which also infect American turtles, were not highlighted as the infection site was not determined.