Figure 3.

Maximum likelihood phylogeny of myxozoan SSU rDNA sequence alignments of 57 taxa (2331 characters). Non-parametric bootstrap values and Bayesian inference posterior probabilities are shown at the nodes. Bold branches lead to a node with a high bootstrap support of ≥ 95 and a Bayesian posterior probability of ≥ 0.98. Nodes with a bootstrap support of < 50 and a Bayesian posterior probability of < 0.95 were considered not supported and are represented with a dash. The upper green boxed section contains freshwater (FW) species which includes 4 main clades: freshwater Myxidium, Myxobolus, urinary and M. lieberkuehni. The lower grey boxed section contains the marine species, which includes 5 main clades: marine Myxidium, marine urinary clade (MUC), Ceratomyxa (Cerato), enteric and multivalvulidan (including the bivalvulids Sphaerospora spp. (dashed line)), and the newly placed sequential lineages, Myxidium spp. from gill monogeneans (dashed red line) at the base of the multivalvulidan clade. Accession numbers for the taxa used can be found in additional file 1, S1.