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 Lactobacillales Ludwig et al. 2010 Family Lactobacillaceae Winslow et al. 1917 (Approved Lists 1980) Genus Lactobacillus Beijerinck 1901 (Approved Lists 1980)