Propionibacterium acnes elongatum Dekio et al. 2015 Propionibacterium acnes elongatum Dekio et al. 2015 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 elongatum Dekio et al. 2015 Propionibacterium acnes (Gilchrist 1900) Douglas and Gunter 1946 (Approved Lists 1980) Propionibacterium acnes acnes Dekio et al. 2015 Propionibacterium acnes defendens McDowell et al. 2016 Propionibacterium acnes elongatum Dekio et al. 2015 Cutibacterium acnes elongatum (Dekio et al. 2015) Dekio et al. 2019 Dekio I. Culak R. Misra R. Gaulton T. Fang M. Sakamoto M. Ohkuma M. Oshima K. Hattori M. Klenk H.P. Rajendram D. Gharbia S.E. Shah H.N. Dissecting the taxonomic heterogeneity within Propionibacterium acnes: proposal for Propionibacterium acnes subsp. acnes subsp. nov. and Propionibacterium acnes subsp. elongatum subsp. nov. 2015 65 12 4776 4787 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/ijsem.0.000648 26432704 Dekio I. McDowell A. Sakamoto M. Tomida S. Ohkuma M. Proposal of new combination, Cutibacterium acnes subsp. elongatum comb. nov., and emended descriptions of the genus Cutibacterium, Cutibacterium acnes subsp. acnes and Cutibacterium acnes subsp. defendens. 2019 69 4 1087 1092 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/ijsem.0.003274 30762517 Dekio I. Culak R. Misra R. Gaulton T. Fang M. Sakamoto M. Ohkuma M. Oshima K. Hattori M. Klenk H.P. Rajendram D. Gharbia S.E. Shah H.N. Dissecting the taxonomic heterogeneity within Propionibacterium acnes: proposal for Propionibacterium acnes subsp. acnes subsp. nov. and Propionibacterium acnes subsp. elongatum subsp. nov. 2015 65 12 4776 4787 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/ijsem.0.000648 26432704 Cutibacterium acnes elongatum (Dekio et al. 2015) Dekio et al. 2019 Dekio I. Culak R. Misra R. Gaulton T. Fang M. Sakamoto M. Ohkuma M. Oshima K. Hattori M. Klenk H.P. Rajendram D. Gharbia S.E. Shah H.N. Dissecting the taxonomic heterogeneity within Propionibacterium acnes: proposal for Propionibacterium acnes subsp. acnes subsp. nov. and Propionibacterium acnes subsp. elongatum subsp. nov. 2015 65 12 4776 4787 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/ijsem.0.000648 26432704 Dekio I. McDowell A. Sakamoto M. Tomida S. Ohkuma M. Proposal of new combination, Cutibacterium acnes subsp. elongatum comb. nov., and emended descriptions of the genus Cutibacterium, Cutibacterium acnes subsp. acnes and Cutibacterium acnes subsp. defendens. 2019 69 4 1087 1092 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/ijsem.0.003274 30762517 This subspecies was stranded in the transfer of Propionibacterium acnes to the new genus Cutibacterium by Scholz et al. 2016.