Incertae sedis 137 None 2015 Incertae sedis 137 None 2015 Universal Root Woese et al. 1990 Bacteria (None 2015) Woese et al. 1990 Proteobacteria (sic) Garrity et al. 2021 Pseudomonadota corrig. Garrity et al. 2021 Alphaproteobacteriota (sic) Garrity et al. 2021 Alphaproteobacteria Garrity et al. 2006 Incertae sedis 136 None 2015 Incertae sedis 137 None 2015 Incertae sedis 136 None 2015 Phreatobacter Tóth et al. 2014 emend. Lee et al. 2017 Tóth E.M. Vengring A. Homonnay Z.G. Kéki Zs. Spröer C. Borsodi A.K. Márialigeti K. Schumann P. Phreatobacter oligotrophus gen. nov., sp. nov., an alphaproteobacterium isolated from ultrapure water of the water purification system of a power plant 2014 64 3 839 845 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/ijs.0.053843-0 24277862 No reference is available 2015