prokaryotes - bacteria see Domain Bacteria Woese et al. 1990 stat. inval. Domain "Bacteria" Woese et al. 1990 stat. inval. see Domain Bacteria Woese et al. 2024 Phylum "Proteobacteria" Garrity et al. 2005 stat. inval. see Phylum Pseudomonadota Garrity et al. 2021 Class Gammaproteobacteria Garrity et al. 2005 Order Legionellales Garrity et al. 2005 Family Legionellaceae Brenner et al. 1979 (Approved Lists 1980) Genus Legionella Brenner et al. 1979 (Approved Lists 1980)