Quatrionicoccus australiensis Tindall and Euzéby 2006 pro synon. Quadricoccus australiensis Maszenan et al. 2002 Quatrionicoccus australiensis Tindall and Euzéby 2006 pro synon. Quadricoccus australiensis Maszenan et al. 2002 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 Rhodocyclales Garrity et al. 2006 Azonexaceae Boden et al. 2017 Quatrionicoccus (Maszenan et al. 2002) Tindall and Euzéby 2006 Quatrionicoccus australiensis Tindall and Euzéby 2006 pro synon. Quadricoccus australiensis Maszenan et al. 2002 Quatrionicoccus (Maszenan et al. 2002) Tindall and Euzéby 2006 Quatrionicoccus australiensis Tindall and Euzéby 2006 pro synon. Quadricoccus australiensis Maszenan et al. 2002 Quadricoccus australiensis Maszenan et al. 2002 Maszenan A.M. Seviour R.J. Patel B.K.C. Schumann P. Quadricoccus australiensis gen. nov., sp. nov., a beta-proteobacterium from activated sludge biomass. 2002 52 1 223 228 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/00207713-52-1-223 11858148 Tindall B.J. Euzéby J.P. Proposal of Parvimonas gen. nov. and Quatrionicoccus gen. nov. as replacements for the illegitimate, prokaryotic, generic names Micromonas Murdoch and Shah 2000 and Quadricoccus Maszenan et al. 2002, respectively. 2006 56 11 2711 2713 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/ijs.0.64338-0 17082417 Tindall B.J. Euzéby J.P. Proposal of Parvimonas gen. nov. and Quatrionicoccus gen. nov. as replacements for the illegitimate, prokaryotic, generic names Micromonas Murdoch and Shah 2000 and Quadricoccus Maszenan et al. 2002, respectively. 2006 56 11 2711 2713 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/ijs.0.64338-0 17082417 Quadricoccus australiensis Maszenan et al. 2002 Tindall B.J. Euzéby J.P. Proposal of Parvimonas gen. nov. and Quatrionicoccus gen. nov. as replacements for the illegitimate, prokaryotic, generic names Micromonas Murdoch and Shah 2000 and Quadricoccus Maszenan et al. 2002, respectively. 2006 56 11 2711 2713 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/ijs.0.64338-0 17082417 Replaces the illegitimate name Quadricoccus australiensis. Quadricoccus is illegitimate because of the algal genus name Quadricoccus Fott which has precedence. The authors treat it as comb. nov. but it should be nom.nov. since the basonym is an illegitimate name.