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 "Firmicutes" (Gibbons and Murray 1978) Garrity and Holt 2001 stat. inval. see Phylum Bacillota Gibbons and Murray 2021 Class Clostridia Rainey 2010 Order Natranaerobiales Mesbah et al. 2007 [monotypic] Family Natranaerobiaceae Mesbah et al. 2007 Genus Natranaerobaculum Zavarzina et al. 2013