Domain Bacteria Woese et al. 1990 Phylum Proteobacteria Garrity and Holt 2001 see Phylum Proteobacteria Garrity et al. 2005 Class "Gammaproteobacteria" nom. inval. see Class Gammaproteobacteria Garrity et al. 2005 Order "Aeromonadales" Garrity and Holt 2001 nom. nud. see Order Aeromonadales Martin-Carnahan and Joseph 2005 Family Succinivibrionaceae Hippe et al. 1999 Genus Ruminobacter (ex Sijpesteijn 1949) Stackebrandt and Hippe 1987