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 Clostridia Rainey 2010
         Order Halanaerobiales corrig. Rainey and Zhilina 1995
           Family Halanaerobiaceae corrig. Oren et al. 1984
             Genus Halocella Simankova et al. 1994