Fig. 1

Phylogeny and mitogenomic architecture of the Spirurida order. Phylogenetic dendrogram constructed using gene sequences of 22 Spirurida mitochondrial genomes. Maximum likelihood and Bayesian inference approaches produced identical topologies, so only the former is shown. L. polyphemus and T. spiralis are outgroups. Scale bar corresponds to the estimated number of substitutions per site. Only the bootstrap values below 100 are shown. Mitogenomic architecture is shown to the right of the corresponding sequences. A1 and A2 are ancestral nodes. GenBank accession numbers are available in Table 1