[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain Bacteria Woese et al. 1990 stat. inval. see Domain Bacteria Woese et al. 2024
     Phylum Firmicutes (Gibbons and Murray 1978) Garrity and Holt 2001 stat. inval. see Phylum Bacillota Gibbons and Murray 2021
       Class "Bacilli" "Garrity and Holt 2001" nom. nud. see Class Bacilli Ludwig et al. 2010
         Order Bacillales Prévot 1953 (Approved Lists 1980) see Order Caryophanales Peshkoff 1939 (Approved Lists 1980)
           Family Thermoactinomycetaceae Matsuo et al. 2006
             Genus Thermoactinomyces Tsilinsky 1899 (Approved Lists 1980)
               1 Thermoactinomyces vulgaris Tsilinsky 1899 (Approved Lists 1980)
               2 Thermoactinomyces intermedius Kurup et al. 1981