Procaryotic Genera 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 Pseudomonadales Orla-Jensen 1921 (Approved Lists 1980) Family Moraxellaceae Rossau et al. 1991 Genus Psychrobacter Juni and Heym 1986