Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [crown] Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Clade neomura Cavalier-Smith, 1987
             Domain Archaea Woese et al. 1990 [paraphyletic]
               Phylum Euryarchaeota Garrity and Holt 2001
                 Class Halobacteria Grant et al. 2002 [monotypic]
                   Order Halobacterialesᵀ Grant and Larsen 1989 [monotypic]
                     Family Halobacteriaceaeᵀ Gibbons 1974 (Approved Lists 1980)
                       Genus Haladaptatus Savage et al. 2007
                         1 Haladaptatus paucihalophilusᵀ Savage et al. 2007
                         2 Haladaptatus cibarius Roh et al. 2010
                         3 Haladaptatus litoreus Cui et al. 2010