Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [crown] Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Domain Bacteria Woese et al. 1990 [paraphyletic?]
             Superphylum Terrabacteria Battistuzzi et al. 2004
               Phylum "Actinobacteria" Garrity and Holt 2001
                 Class Actinobacteriaᵀ Stackebrandt et al. 1997
                   Order Actinomycetalesᵀ Buchanan 1917 (Approved Lists 1980)
                     Suborder Propionibacterineae Rainey et al. 1997
                       Family Propionibacteriaceaeᵀ Delwiche 1957 (Approved Lists 1980)
                         Genus Propioniciclava Sugawara et al. 2011
                         01 Genus Propionibacteriumᵀ Orla-Jensen 1909 (Approved Lists 1980)
                         02 Genus Aestuariimicrobium Jung et al. 2007 [monotypic]
                         03 Genus Auraticoccus Alonso-Vega et al. 2011 [monotypic]
                         04 Genus Brooklawnia Rainey et al. 2006 [monotypic]
                         05 Genus Granulicoccus Maszenan et al. 2007 [monotypic]
                         06 Genus Luteococcus Tamura et al. 1994
                         07 Genus Mariniluteicoccus Zhang et al. 2014 [monotypic]
                         08 Genus Microlunatus Nakamura et al. 1995
                         09 Genus Propioniferax Yokota et al. 1994 [monotypic]
                         10 Genus Propionimicrobium Stackebrandt et al. 2002 [monotypic]
                         11 Genus Tessaracoccus Maszenan et al. 1999
                         12 Genus Friedmanniella Schumann et al. 1997
                         13 Genus Micropruina Shintani et al. 2000 [monotypic]
                         14 Genus Naumannella Rieser et al. 2012 [monotypic]
                         15 Genus Propionicimonas Akasaka et al. 2003 [monotypic]
                         16 Genus Propionicicella Bae et al. 2006 [monotypic]