Azotobacter chroococcum chroococcum (Beijerinck 1901) Jin et al. 2020 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 Gammaproteobacteria Garrity et al. 2005 emend. Williams and Kelly 2013 Pseudomonadales Orla-Jensen 1921 (Approved Lists 1980) emend. Liao et al. 2020 Pseudomonadaceae Winslow et al. 1917 (Approved Lists 1980) Azotobacter Beijerinck 1901 emend. Johnstone 1974 (Approved Lists 1980) Azotobacter chroococcum Beijerinck 1901 (Approved Lists 1980) emend. Jin et al. 2020 Azotobacter chroococcum chroococcum (Beijerinck 1901) Jin et al. 2020 Azotobacter chroococcum Beijerinck 1901 (Approved Lists 1980) emend. Jin et al. 2020 Azotobacter chroococcum isscasi Jin et al. 2020 Azotobacter chroococcum Beijerinck 1901 (Approved Lists 1980) emend. Jin et al. 2020 Azotobacter chroococcum chroococcum (Beijerinck 1901) Jin et al. 2020 Jin H. Wang H. Zhang Y. Hu T. Lin Z. Liu B. Ma J. Wang X. Liu Q. Lin X. Xie Z. Description of Azotobacter chroococcum subsp. isscasi subsp. nov. isolated from paddy soil and establishment of Azotobacter chroococcum subsp. chroococcum subsp. nov. 2020 70 3 2124 2131 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/ijsem.0.004026 31995466 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 Jin H. Wang H. Zhang Y. Hu T. Lin Z. Liu B. Ma J. Wang X. Liu Q. Lin X. Xie Z. Description of Azotobacter chroococcum subsp. isscasi subsp. nov. isolated from paddy soil and establishment of Azotobacter chroococcum subsp. chroococcum subsp. nov. 2020 70 3 2124 2131 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/ijsem.0.004026 31995466