Figure 2. Phylogeny of filarial nematodes based on cytochrome c oxidase subunit 1 (cox1) gene sequences. Thelazia spp. species were used as outgroup. Bootstrap confidence values (100 replicates) are shown at the nodes only for values >50%. Solid diamond indicates nematode isolated in this study. Numbers in parentheses are GenBank accession numbers. Scale bar indicates nucleotide substitutions per site.