Spirillum kriegii Podkopaeva et al. 2006 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) Spirillum Ehrenberg 1832 (Approved Lists 1980) emend. Podkopaeva et al. 2009 Spirillum kriegii Podkopaeva et al. 2006 Spirillum Ehrenberg 1832 (Approved Lists 1980) emend. Podkopaeva et al. 2009 Spirillum volutans Ehrenberg 1832 (Approved Lists 1980) Spirillum winogradskyi Podkopaeva et al. 2009 Spirillum kriegii Podkopaeva et al. 2006 Podkopaeva D.A. Grabovich M.Yu. Dubinina G.A. Lysenko A.M. Tourova T.P. Kolganova T.V. Two new species of microaerophilic sulfur Spirilla, Spirillum winogradskii sp. nov. and Spirillum kriegii sp. nov. 2006 75 172 179 Microbiology (English translation of Mikrobiologiya) 0026-2617 1608-3237 10.1134/S002626170602010X 16758869 Podkopaeva D.A. Grabovich M.Yu. Dubinina G.A. Lysenko A.M. Tourova T.P. Kolganova T.V. Two new species of microaerophilic sulfur Spirilla, Spirillum winogradskii sp. nov. and Spirillum kriegii sp. nov. 2006 75 172 179 Microbiology (English translation of Mikrobiologiya) 0026-2617 1608-3237 10.1134/S002626170602010X 16758869