Figure 2: The phylogeny of R. differens and relatives inferred from the nuclear ribosomal 18S sequences using the Neighbor-Joining method. The tree is drawn to scale, and the branch lengths are in the same units as the evolutionary distances. Bootstraps (1050 replicates) are shown next to the branches. The optimal tree (length = 0.06974) is shown, with a total of 483 positions in the final dataset.