 While these features are found randomly distributed in other species of aerobic bacteria, to date all of these are only found in "Paracoccus denitrificans".In addition, a feasible mechanism for the evolution of a eukaryotic mitochondrion, from the plasma membrane of an ancestral aerobic bacterium resembling "P. denitrificans" to the inner mitochondrial membrane, has been suggested.More recent phylogenetic analysis however puts other bacteria more closely related to mitochrondria