Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Clade neomura Cavalier-Smith, 1987
             Domain Archaea Woese et al. 2024 [paraphyletic]
               Kingdom Methanobacteriati (Garrity and Holt 2023) Oren and Göker 2024
                 Phylum Methanobacteriotaᵀ Garrity and Holt 2023
                   Class Halobacteria Grant et al. 2002
                     Order Halobacterialesᵀ Grant and Larsen 1989
                       1 Family Halalkalicoccaceae Mao et al. 2025
                       2 Family Haloarculaceae Gupta et al. 2016
                       3 Family Halobacteriaceaeᵀ Gibbons 1974 (Approved Lists 1980)
                       4 Family Halococcaceae Gupta et al. 2016 [monotypic]
                       5 Family Haloferacaceae Gupta et al. 2015
                       6 Family Natrialbaceae Gupta et al. 2015
                       7 Family Natronoarchaeaceae Sorokin et al. 2023