Procaryotic Genera Domain "Bacteria" Woese et al. 1990 Phylum Proteobacteria Garrity and Holt 2001 see Phylum Proteobacteria Garrity et al. 2005 Class "Alphaproteobacteria" Garrity and Holt 2001 nom. nud. see Class Alphaproteobacteria Garrity et al. 2006 Order "Sphingomonadales" [monotypic] see Order Sphingomonadales Yabuuchi and Kosako 2006 Family Sphingomonadaceae Kosako et al. 2000 Genus Erythromonas Yurkov et al. 1997 see Genus Blastomonas Sly and Cahill 1997