Spirillaceae Migula 1894 (Approved Lists 1980) Spirillum Ehrenberg 1832 (Approved Lists 1980) emend. Podkopaeva et al. 2009 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 Nitrosomonadales Garrity et al. 2006 emend. Boden et al. 2017 Spirillaceae Migula 1894 (Approved Lists 1980) Nitrosomonadales Garrity et al. 2006 emend. Boden et al. 2017 Nitrosomonadaceae Garrity et al. 2006 Gallionellaceae Henrici and Johnson 1935 (Approved Lists 1980) emend. Kojima et al. 2021 Methylophilaceae Garrity et al. 2006 Thiobacillaceae Boden et al. 2017 Sterolibacteriaceae Boden et al. 2017 Usitatibacteraceae Vieira et al. 2021 Spirillum Ehrenberg 1832 (Approved Lists 1980) emend. Podkopaeva et al. 2009 Migula W. Über ein neues System der Bakterien. 1894 1 235 238 Arbeiten aus dem Bakteriologischen Institut der Technischen Hochschule zu Karlsruhe Arb Bakteriol Inst Karlsruhe Breed R.S. Murray E.G.D. Smith N.R. Breed R.S. Murray E.G.D. Smith N.R. Suborder II. Pseudomonadineae Breed, Murray and Smith, Sub-Ordo Nov. 1957 7 67 261 Bergey's Manual of Determinative Bacteriology The Williams and Wilkins Co. Baltimore Prévot A.R. Prévot A.R. Manuel de Classification et de Détermination des Bactéries Anaérobies 1940 1 223 Manuel de Classification et de Détermination des Bactéries Anaérobies Masson Paris Garrity G.M. Holt J.G. Garrity G.M. Boone D.R. Castenholz R.W. The Road Map to the Manual 2001 1 2 119 169 Bergey's Manual of Systematic Bacteriology Springer New York