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 "chemoautotrophic bacteria" Class "oxidizers of sulfur compounds" see Order Thiotrichales Genus Sulfolobus Brock et al. 1972 (Approved Lists 1980) Sulfolobus acidocaldarius Brock et al. 1972 (Approved Lists 1980)