living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Prokaryotae see Superkingdom Prokarya
     Kingdom Monera Haeckel 1866 see Domain Bacteria Woese et al. 1990
       Division Bacteria (Haeckel 1894) see Domain Bacteria Woese et al. 1990
         "Phototrophic bacteria"
           Rhodospirillineae
             Family Chromatiaceae Bavendamm 1924 (Approved Lists 1980)
               Genus Thiocapsa Winogradsky 1888 (Approved Lists 1980)
                 1 Thiocapsa pfennigii Eimhjellen 1970 (Approved Lists 1980) see Thiococcus pfennigii (Eimhjellen 1970) Imhoff et al. 1998
                 2 Thiocapsa roseopersicina Winogradsky 1888 (Approved Lists 1980)