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 "Proteobacteria" Craig et al. 2010
               Phylum "Alphaproteobacteria" Garrity et al., 2006 [monotypic]
                 Class Alphaproteobacteriaᵀ Garrity et al. 2006
                   Order Sphingomonadales Yabuuchi and Kosako 2006
                     Family Erythrobacteraceae Lee et al. 2005
                       Genus Qipengyuania Wu et al. 2015
                       1.1 Genus Erythrobacterᵀ Shiba and Simidu 1982
                       1.2 Genus Altererythrobacter Kwon et al. 2007
                       2 Genus Croceicoccus Xu et al. 2009 [monotypic]
                       3 Genus Erythromicrobium Yurkov et al. 1994 [monotypic]
                       4 Genus Porphyrobacter Fuerst et al. 1993