Caulobacterineae Breed et al. 1944 (Approved Lists 1980) Caulobacterineae Breed et al. 1944 (Approved Lists 1980) Caulobacter Henrici and Johnson 1935 (Approved Lists 1980) emend. Abraham et al. 1999 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 Caulobacterales Henrici and Johnson 1935 (Approved Lists 1980) Caulobacterineae Breed et al. 1944 (Approved Lists 1980) Caulobacterales Henrici and Johnson 1935 (Approved Lists 1980) Caulobacteraceae Henrici and Johnson 1935 (Approved Lists 1980) Caulobacteraceae Henrici and Johnson 1935 (Approved Lists 1980) Breed R.S. Murray E.G.D. Hitchens P. The outline used in the Bergey's Manual of Determinative Becteriology 1944 8 4 255 260 Bacteriological Reviews Bacteriol Rev 0005-3678 1098-5557 16350097 Skerman V.B.D. McGowan V. Sneath P.H.A. Approved Lists of Bacterial Names 1980 30 1 225 420 International Journal of Systematic Bacteriology Int J Syst Bacteriol 0020-7713 10.1099/00207713-30-1-225 Breed R.S. Murray E.G.D. Hitchens P. The outline used in the Bergey's Manual of Determinative Becteriology 1944 8 4 255 260 Bacteriological Reviews Bacteriol Rev 0005-3678 1098-5557 16350097 not currently in use