These include strains assigned to taxonomically diverse genera; Porphyrobacter, Paracoccus, Rhodoferax, Paraburkholderia and Shewanella.
Stofnarnir tilheyra fimm mismunandi ættkvíslum baktería; Porphyrobacter, Paracoccus, Rhodoferax, Paraburkholderia og Shewanella.