organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Kingdom Monera Haeckel 1866 see Domain Bacteria Woese et al. 1990
     Phylum "anaerobic photosynthetic bacteria" see Domain Bacteria Woese et al. 1990
       Class "Purple Sulfur Bacteria" see Order Chromatiales Garrity et al. 2001 nom. ined.