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 Piscirickettsiaceae Fryer and Lannan 2005
                       Genus Thiomicrospira Kuenen and Veldkamp 1972 (Approved Lists 1980)
                         01 Thiomicrospira arctica Knittel et al. 2005
                         02 Thiomicrospira chilensis Brinkhoff et al. 1999
                         03 Thiomicrospira crunogena Jannasch et al. 1985
                         04 Thiomicrospira frisia Brinkhoff et al. 1999
                         05 Thiomicrospira halophila Sorokin et al. 2006
                         06 Thiomicrospira kuenenii Brinkhoff et al. 1999
                         07 Thiomicrospira pelophilaᵀ Kuenen and Veldkamp 1972 (Approved Lists 1980)
                         08 Thiomicrospira psychrophila Knittel et al. 2005
                         09 Thiomicrospira thermophila Takai et al. 2004
                         10 Thiomicrospira thyasirae (Wood and Kelly 1995) Wood and Kelly 1995