[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain Bacteria Woese et al. 1990
     Phylum "Proteobacteria" Garrity et al. 2005 see Superphylum Proteobacteria Craig et al. 2010
       Class Gammaproteobacteria Garrity et al. 2005
         Order Thiotrichales Garrity et al. 2005
           Family Piscirickettsiaceae Fryer and Lannan 2005
             Genus Sulfurivirga Takai et al. 2006
               Sulfurivirga caldicuralii Takai et al. 2006