Sphaerobacter Demharter et al. 1989 Sphaerobacter thermophilus Demharter et al. 1989 emend. Nouioui et al. 2018 Universal Root Woese et al. 1990 Bacteria (None 2015) Woese et al. 1990 Chloroflexi (sic) Garrity and Holt 2021 emend. Hugenholtz and Stackebrandt 2004 non Chloroflexi Gupta et al. 2013 Chloroflexota corrig. Garrity and Holt 2021 emend. Hugenholtz and Stackebrandt 2004 Thermomicrobia Garrity and Holt 2002 emend. Hugenholtz and Stackebrandt 2004 non Thermomicrobia Garrity and Holt 2021 Thermomicrobiales Garrity and Holt 2002 Thermomicrobiaceae Garrity and Holt 2002 Sphaerobacter Demharter et al. 1989 Thermomicrobiaceae Garrity and Holt 2002 Thermomicrobium Jackson et al. 1973 (Approved Lists 1980) Thermorudis King and King 2014 Sphaerobacter thermophilus Demharter et al. 1989 emend. Nouioui et al. 2018 Demharter W. Hensel R. Smida J. Stackebrandt E. Sphaerobacter thermophilus gen. nov., sp. nov. A deeply rooting member of the actinomycetes subdividion isolated from thermophilically treated sewage sludge 1989 11 261 266 Systematic and Applied Microbiology Syst Appl Microbiol 0723-2020 Hugenholtz P. Stackebrandt E. Reclassification of Sphaerobacter thermophilus from the subclass Sphaerobacteridae in the phylum Actinobacteria to the class Thermomicrobia (emended description) in the phylum Chloroflexi (emended description) 2004 54 6 2049 2051 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/ijs.0.03028-0 15545432 Stackebrandt E. Rainey F.A. Ward-Rainey N.L. Proposal for a new hierarchic classification system, Actinobacteria classis nov. 1997 47 2 479 491 International Journal of Systematic Bacteriology Int J Syst Bacteriol 0020-7713 10.1099/00207713-47-2-479