Nitrosococcus oceanus (sic) (Watson 1965) Watson 1971 (Approved Lists 1980) Nitrosococcus oceani corrig. (Watson 1965) Watson 1971 (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 Gammaproteobacteria Garrity et al. 2005 emend. Williams and Kelly 2013 Chromatiales Imhoff 2005 Chromatiaceae Bavendamm 1924 (Approved Lists 1980) emend. Sisinthy et al. 2017 Nitrosococcus Winogradsky 1892 (Approved Lists 1980) emend. Wang et al. 2016 Nitrosococcus oceanus (sic) (Watson 1965) Watson 1971 (Approved Lists 1980) Nitrosococcus oceani corrig. (Watson 1965) Watson 1971 (Approved Lists 1980) Nitrosococcus Winogradsky 1892 (Approved Lists 1980) emend. Wang et al. 2016 Nitrosococcus nitrosus (Migula 1900) Buchanan 1925 (Approved Lists 1980) Nitrosococcus sp. None 2015 Nitrosococcus halophilus Koops et al. 1990 emend. Campbell et al. 2011 Nitrosococcus watsonii Campbell et al. 2011 Nitrosococcus wardiae Wang et al. 2016 Nitrosococcus oceanus (sic) (Watson 1965) Watson 1971 (Approved Lists 1980) Nitrosococcus oceani corrig. (Watson 1965) Watson 1971 (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 Watson S.W. Taxonomic considerations of the family Nitrobacteriaceae Buchanan. Requests for opinions. 1971 21 3 254 270 International Journal of Systematic Bacteriology Int J Syst Bacteriol 0020-7713 10.1099/00207713-21-3-254