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 "Proteobacteria" Craig et al. 2010
               Phylum "Gammaproteobacteria" Garrity et al., 2005 [monotypic]
                 Class Gammaproteobacteriaᵀ Garrity et al. 2005
                   Order Thiotrichales Garrity et al. 2005
                     Family Thiotrichaceaeᵀ Garrity et al. 2005
                       1 Genus Thiothrixᵀ Winogradsky 1888 (Approved Lists 1980)
                       2 Genus Achromatium Schewiakoff 1893 (Approved Lists 1980) [monotypic]
                       3 Genus Beggiatoa Trevisan 1842 (Approved Lists 1980) [monotypic]
                       4 Genus Cocleimonas Tanaka et al. 2011 [monotypic]
                       5 Genus Leucothrix Oersted 1844 (Approved Lists 1980) [monotypic]
                       6 Genus Thiobacterium (ex Janke 1924) La Riviere and Kuenen 1989 [monotypic]
                       7 Genus Thiomargarita Schulz et al. 1999 [monotypic]
                       8 Genus Thioploca Lauterborn 1907 (Approved Lists 1980)
                       9 Genus Thiospira Visloukh 1914 (Approved Lists 1980) [monotypic]