prokaryotes - bacteria see Domain Bacteria Woese et al. 1990
   Domain "Bacteria" Woese et al. 1990
     Phylum "Proteobacteria" Garrity et al. 2005 see Superphylum Proteobacteria Craig et al. 2010
       Class Alphaproteobacteria Garrity et al. 2006
         Order Sphingomonadales Yabuuchi and Kosako 2006
           Family Erythrobacteraceae Lee et al. 2005
             1 Genus Altererythrobacter Kwon et al. 2007
             2 Genus Croceicoccus Xu et al. 2009
             3 Genus Erythrobacter Shiba and Simidu 1982
             4 Genus Erythromicrobium Yurkov et al. 1994
             5 Genus Porphyrobacter Fuerst et al. 1993
             6 Genus Qipengyuania Wu et al. 2015