Aquaspirillum gracile (Canale-Parola et al. 1966) Hylemon et al. 1973 (Approved Lists 1980) 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 gracile (Canale-Parola et al. 1966) Hylemon et al. 1973 (Approved Lists 1980) Aquaspirillum Hylemon et al. 1973 emend. Kreig 1974 (Approved Lists 1980) Aquaspirillum sinuosum (Williams and Rittenberg 1957) Hylemon et al. 1973 (Approved Lists 1980) Aquaspirillum arcticum Butler et al. 1990 Aquaspirillum delicatum (Leifson 1962) Hylemon et al. 1973 (Approved Lists 1980) Aquaspirillum serpens (Müller 1786) Hylemon et al. 1973 (Approved Lists 1980) emend. Boivin et al. 1985 Aquaspirillum putridiconchylium (Terasaki 1961) Hylemon et al. 1973 (Approved Lists 1980) Aquaspirillum psychrophilum (Terasaki 1973) Terasaki 1979 (Approved Lists 1980) Aquaspirillum autotrophicum Aragno and Schlegel 1978 (Approved Lists 1980) Aquaspirillum metamorphum (Terasaki 1961) Hylemon et al. 1973 (Approved Lists 1980) Aquaspirillum itersonii (Giesberger 1936) Hylemon et al. 1973 (Approved Lists 1980) Aquaspirillum anulus (Williams and Rittenberg 1957) Hylemon et al. 1973 (Approved Lists 1980) Aquaspirillum magnetotacticum Maratea and Blakemore 1981 Aquaspirillum polymorphum (Williams and Rittenberg 1957) Hylemon et al. 1973 (Approved Lists 1980) Aquaspirillum bengal Kumar et al. 1974 (Approved Lists 1980) Aquaspirillum peregrinum (Pretorius 1963) Hylemon et al. 1973 (Approved Lists 1980) Aquaspirillum dispar Hylemon et al. 1973 (Approved Lists 1980) Aquaspirillum giesbergeri (Williams and Rittenberg 1957) Hylemon et al. 1973 (Approved Lists 1980) Aquaspirillum aquaticum Hylemon et al. 1973 (Approved Lists 1980) Aquaspirillum fasciculus Strength et al. 1976 (Approved Lists 1980) Aquaspirillum soli Moya et al. 2017 Aquaspirillum gracile (Canale-Parola et al. 1966) Hylemon et al. 1973 (Approved Lists 1980) Hylemonella gracilis (Canale-Parola et al. 1966) Spring et al. 2004 Spring S. Jäckel U. Wagner M. Kämpfer P. Ottowia thiooxydans gen. nov., sp. nov., a novel facultatively anaerobic, N2O-producing bacterium isolated from activated sludge, and transfer of Aquaspirillum gracile to Hylemonella gracilis gen. nov., comb. nov. 2004 54 1 99 106 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/ijs.0.02727-0 14742465 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 Liolios K. Chen I.M. Mavromatis K. Tavernarakis N. Hugenholtz P. Markowitz V.M. Kyrpides N.C. The Genomes On Line Database (GOLD) in 2009: status of genomic and metagenomic projects and their associated metadata 2010 38 D346 354 Nucleic Acids Research Nucleic Acids Res. 0305-1048 1362-4962 10.1093/nar/gkp848 19914934 Hylemon P.B. Wells J.S. Krieg N.R. Jannasch H.W. The genus Spirillum: a taxonomic study. 1973 23 4 340 380 International Journal of Systematic Bacteriology Int J Syst Bacteriol 0020-7713 10.1099/00207713-23-4-340