Phylogeny of filarial nematodes based on partitioned concatenated datasets of seven markers. Analysis is based on 12S rDNA, cytochrome oxidase subunit I (cox1), RNA polymerase II large subunit (rbp1), heat shock protein (hsp70), myosin heavy chain (myoHC), 18S rDNA and 28S rDNA sequences. Filaria latala and Protospirura muricola were used as outgroups. The topology was inferred using Bayesian inference. Nodes are associated with Bayesian posterior probabilities based on one run of five million generations. The onchocercid groups are indicated as ONC1 to ONC5 according to Lefoulon et al. [24]. Bold represents the newly sequenced specimens.