Propionibacterium acnes defendens McDowell et al. 2016 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 acnes (Gilchrist 1900) Douglas and Gunter 1946 (Approved Lists 1980) Propionibacterium acnes defendens McDowell et al. 2016 Propionibacterium acnes (Gilchrist 1900) Douglas and Gunter 1946 (Approved Lists 1980) Propionibacterium acnes acnes Dekio et al. 2015 Propionibacterium acnes elongatum Dekio et al. 2015 Propionibacterium acnes defendens McDowell et al. 2016 Cutibacterium acnes defendens (McDowell et al. 2016) Nouioui et al. 2018 emend. Dekio et al. 2019 McDowell A. Barnard E. Liu J. Li H. Patrick S. Proposal to reclassify Propionibacterium acnes type I as Propionibacterium acnes subsp. acnes subsp. nov. and Propionibacterium acnes type II as Propionibacterium acnes subsp. defendens subsp. nov. 2016 66 12 5358 5365 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/ijsem.0.001521 27670798 McDowell A. Barnard E. Liu J. Li H. Patrick S. Proposal to reclassify Propionibacterium acnes type I as Propionibacterium acnes subsp. acnes subsp. nov. and Propionibacterium acnes type II as Propionibacterium acnes subsp. defendens subsp. nov. 2016 66 12 5358 5365 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/ijsem.0.001521 27670798