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 Gammaproteobacteria Garrity et al. 2005 Order Cellvibrionales Spring et al. 2015 Family Cellvibrionaceae Spring et al. 2015 Genus Umboniibacter Romanenko et al. 2010