Aquaspirillum serpens bengal (Kumar et al. 1974) Pot and Gillis 2005 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 Betaproteobacteria Garrity et al. 2006 emend. Boden et al. 2017 Neisseriales Tønjum 2006 emend. Chen et al. 2021 Aquaspirillaceae Chen et al. 2022 Aquaspirillum Hylemon et al. 1973 emend. Kreig 1974 (Approved Lists 1980) Aquaspirillum serpens (Müller 1786) Hylemon et al. 1973 (Approved Lists 1980) emend. Boivin et al. 1985 Aquaspirillum serpens bengal (Kumar et al. 1974) Pot and Gillis 2005 Aquaspirillum serpens (Müller 1786) Hylemon et al. 1973 (Approved Lists 1980) emend. Boivin et al. 1985 Aquaspirillum serpens serpens (Müller 1786) Pot and Gillis 2005 Aquaspirillum serpens bengal (Kumar et al. 1974) Pot and Gillis 2005 Aquaspirillum bengal Kumar et al. 1974 (Approved Lists 1980) 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 Pot B. Gillis M. Garrity G.M. Brenner D.J. Krieg N.R. Staley J.T. Genus III. Aquaspirillum Hylemon, Wells, Krieg and Jannasch 1973b, 361. 2005 2, Part C 2 801 823 Bergey's Manual of Systematic Bacteriology Springer New York 0387241450