[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain Bacteria Woese et al. 1990
     Phylum Firmicutes corrig. Gibbons and Murray 1978 (Approved Lists 1980)
       Class "Clostridia" Garrity et al. 2001 nom. ined. see Class Clostridia Rainey 2010
         Order Halanaerobiales corrig. Rainey and Zhilina 1995
           Family Halobacteroidaceae Zhilina and Rainey 1995
             1 Genus Halobacteroides Oren et al. 1984
             2 Genus Acetohalobium Zhilina and Zavarzin 1990
             3 Genus Halanaerobacter corrig. Liaw and Mah 1996
             4 Genus Halonatronum Zhilina et al. 2001
             5 Genus Natroniella Zhilina et al. 1996
             6 Genus Orenia Rainey and Stackebrandt 1995
             7 Genus Selenihalanaerobacter Switzer Blum et al. 2001
             8 Genus Sporohalobacter Oren et al. 1988