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]
           Domain Bacteria Woese et al. 1990 [paraphyletic?]
             Superphylum Fibrobacteres-Chlorobi-Bacteroidetes (FCB) Gupta 2004
               Phylum Bacteroidetes Krieg et al. 2012
                 Class Bacteroidiaᵀ Krieg 2012 [monotypic]
                   Order Bacteroidalesᵀ Krieg 2012
                     Family Marinilabiliaceae Ludwig et al. 2012
                       Genus Thermophagus Gao et al. 2013
                       1 Genus Alkalitalea Zhao and Chen 2012 [monotypic]
                       2 Genus Anaerophaga Denger et al. 2002 [monotypic]
                       3.1 Genus Alkaliflexus Zhilina et al. 2005 [monotypic]
                       3.2 Genus Marinilabiliaᵀ Nakagawa and Yamasato 1996
                       4 Genus Carboxylicivirga Yang et al. 2014
                       5 Genus Geofilum Miyazaki et al. 2012 [monotypic]
                       6 Genus Mangroviflexus Zhao et al. 2012 [monotypic]
                       7 Genus Natronoflexus Sorokin et al. 2012 [monotypic]