Propionibacterium microaerophilum Koussémon et al. 2001 Propionibacterium microaerophilum Koussémon et al. 2001 Universal Root Woese et al. 1990 Bacteria (None 2015) Woese et al. 1990 Actinobacteria (sic) Goodfellow 2021 non Actinobacteria Stackebrandt et al. 1997 Actinomycetota corrig. Goodfellow 2021 Actinobacteriota corrig. Goodfellow 2021 Actinomycetes Krasil'nikov 1949 (Approved Lists 1980) Propionibacteriales (Rainey et al. 1997) Patrick and McDowell 2015 emend. Nouioui et al. 2018 Propionibacteriaceae Delwiche 1957 (Approved Lists 1980) emend. Zhi et al. 2009 Propionibacterium Orla-Jensen 1909 (Approved Lists 1980) emend. Scholz and Kilian 2016 Propionibacterium microaerophilum Koussémon et al. 2001 Propionibacterium Orla-Jensen 1909 (Approved Lists 1980) emend. Scholz and Kilian 2016 Propionibacterium australiense Bernard et al. 2002 Propionibacterium acidipropionici corrig. Orla-Jensen 1909 (Approved Lists 1980) Propionibacterium acidi-propionici (sic) Orla-Jensen 1909 (Approved Lists 1980) Propionibacterium propionicum corrig. (Buchanan and Pine 1962) Charfreitag et al. 1988 Propionibacterium propionicus (sic) (Buchanan and Pine 1962) Charfreitag et al. 1988 Propionibacterium olivae Lucena-Padrós et al. 2014 Propionibacterium granulosum (Prévot 1938) Moore and Holdeman 1970 (Approved Lists 1980) Propionibacterium avidum (Eggerth 1935) Moore and Holdeman 1969 (Approved Lists 1980) Propionibacterium innocuum Pitcher and Collins 1992 Propionibacterium lymphophilum (Torrey 1916) Johnson and Cummins 1972 (Approved Lists 1980) emend. Nouioui et al. 2018 Propionibacterium damnosum Lucena-Padrós et al. 2014 Propionibacterium jensenii van Niel 1928 (Approved Lists 1980) Propionibacterium cyclohexanicum Kusano et al. 1997 Propionibacterium sp. None 2015 Propionibacterium thoenii van Niel 1928 (Approved Lists 1980) Propionibacterium acnes (Gilchrist 1900) Douglas and Gunter 1946 (Approved Lists 1980) Propionibacterium namnetense Aubin et al. 2016 Propionibacterium acidifaciens Downes and Wade 2009 Propionibacterium freudenreichii van Niel 1928 (Approved Lists 1980) emend. Nouioui et al. 2018 Propionibacterium ruminifibrarum Vaidya et al. 2019 Propionibacterium microaerophilum Koussémon et al. 2001 Acidipropionibacterium microaerophilum (Koussémon et al. 2001) Scholz and Kilian 2016 Koussémon M. Combet-Blanc Y. Patel B.K.C. Cayol J.L. Thomas P. Garcia J.L. Ollivier B. Propionibacterium microaerophilum sp. nov., a microaerophilic bacterium isolated from olive mill wastewater 2001 51 4 1373 1382 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/00207713-51-4-1373 11491335 Koussémon M. Combet-Blanc Y. Patel B.K.C. Cayol J.L. Thomas P. Garcia J.L. Ollivier B. Propionibacterium microaerophilum sp. nov., a microaerophilic bacterium isolated from olive mill wastewater 2001 51 4 1373 1382 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/00207713-51-4-1373 11491335 Acidipropionibacterium microaerophilum (Koussémon et al. 2001) Scholz and Kilian 2016 Scholz C.F.P. Kilian M. The natural history of cutaneous propionibacteria and reclassification of selected species within the genus Propionibacterium to the proposed novel genera Acidipropionibacterium gen. nov., Cutibacterium gen. nov. and Pseudopropionibacterium gen. nov. 2016 66 11 4422 4432 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/ijsem.0.001367 27488827 Koussémon M. Combet-Blanc Y. Patel B.K.C. Cayol J.L. Thomas P. Garcia J.L. Ollivier B. Propionibacterium microaerophilum sp. nov., a microaerophilic bacterium isolated from olive mill wastewater 2001 51 4 1373 1382 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/00207713-51-4-1373 11491335 Tindall B.J. The status of names whose nomenclatural types are based on strains deposited solely for patent purposes. 2019 69 8 2616 2620 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/ijsem.0.003527 31215862 Tindall 2019 asserts that one of the two nomenclatural type deposits is a patent strain.