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
                       Family Haloferacaceae Gupta et al. 2015
                         Genus Haloferaxᵀ Torreblanca et al. 1986
                           01 Haloferax alexandrinus Asker and Ohta 2002
                           02 Haloferax chudinovii Saralov et al. 2014
                           03 Haloferax denitrificans (Tomlinson et al. 1986) Tindall et al. 1989
                           04 Haloferax elongans Allen et al. 2008
                           05 Haloferax gibbonsii Juez et al. 1986
                           06 Haloferax larsenii Xu et al. 2007
                           07 Haloferax lucentense corrig. Gutierrez et al. 2004
                           08 Haloferax mediterranei (Rodriguez-Valera et al. 1983) Torreblanca et al. 1987
                           09 Haloferax mucosum Allen et al. 2008
                           10 Haloferax prahovense Enache et al. 2007
                           11 Haloferax sulfurifontis Elshahed et al. 2004
                           12 Haloferax volcaniiᵀ (Mullakhanbhai and Larsen 1975) Torreblanca et al. 1986