Incertae sedis 24 None 2015 Incertae sedis 24 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 23 None 2015 Incertae sedis 24 None 2015 Incertae sedis 23 None 2015 Rhizomicrobium Ueki et al. 2010 Garrity G.M. Bell J.A. Lilburn T. Garrity G.M. Brenner D.J. Krieg N.R. Staley J.T. Class I. Alphaproteobacteria class. nov. 2005 2, Part C 2 1 Bergey's Manual of Systematic Bacteriology Springer New York 0387241450 Ueki A. Kodama Y. Kaku N. Shiromura T. Satoh A. Watanabe K. Ueki K. Rhizomicrobium palustre gen. nov., sp. nov., a facultatively anaerobic, fermentative stalked bacterium in the class Alphaproteobacteria isolated from rice plant roots 2010 56 193 203 The Journal of General and Applied Microbiology J Gen Appl Microbiol 0022-1260 1349-8037 10.2323/jgam.56.193 20647676 No reference is available 2015