Table 1.

List of known (endo)symbioses of prokaryotic hosts and symbionts that evolved (presumably) after mitochondria

For reference, we have included the mitochondrial origin as well. Note, that in most cases, the symbiosis is epibiotic and true endosymbiosis is mostly restricted to prokaryotic hosts embedded in eukaryotic cells. Yellow background of Host and Symbiont columns stands for Proteobacteria, green for Cyanobacteria, blue for other bacteria, and red for Archaea, striped for unknown. Blue background for Type column stands for endosymbiotic organelle, green for endosymbiosis, and yellow for ectosymbiosis