prokaryotes - bacteria see Domain Bacteria Woese et al. 1990 Domain "Bacteria" Woese et al. 1990 Phylum "Firmicutes" corrig. Gibbons and Murray 1978 (Approved Lists 1980) Class Bacilli Ludwig et al. 2010 Order Bacillales Prévot 1953 (Approved Lists 1980) Family Bacillaceae Fischer 1895 (Approved Lists 1980) Genus Natronobacillus Sorokin et al. 2009