[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain Bacteria Woese et al. 1990 stat. inval. see Domain Bacteria Woese et al. 2024
     Phylum "Actinobacteria" Garrity and Holt 2001 see Phylum Actinobacteria Goodfellow 2012 nom. inval.
       Class "Actinobacteria" Stackebrandt et al. 1997 nom. illeg. see Class Actinomycetes Krassilnikov 1949 (Approved Lists 1980)
         Subclass Actinobacteridae Stackebrandt et al. 1997 see Class Actinobacteria Stackebrandt et al. 1997 nom. illeg.
           Order Actinomycetales Buchanan 1917 (Approved Lists 1980)
             Suborder Propionibacterineae (sic) Rainey et al. 1997 see Suborder Propionibacteriineae corrig. Rainey et al. 1997
               Family Propionibacteriaceae Delwiche 1957 (Approved Lists 1980)
                 Genus Propionibacterium Orla-Jensen 1909 (Approved Lists 1980)
                   Propionibacterium acnes (sic) (Gilchrist 1900) Douglas and Gunter 1946 (Approved Lists 1980)