A triploblast origin for Myxozoa?

Hox genes, which play key roles in the development of body plans, have been described from a variety of metazoans. Here we report the presence of Hox class genes that are typical of triploblasts in Myxozoa, formerly a protozoan taxon. This finding confirms Myxozoa's phylogenetic affinity with the Bilateria and reveals an extreme example of parasitic degeneracy.