Hyperthermus Zillig et al. 1991 Hyperthermus butylicus Zillig et al. 1991 Universal Root Woese et al. 1990 Archaea Woese et al. 1990 Crenarchaeota (sic) Garrity and Holt 2021 Thermoproteota corrig. Garrity and Holt 2021 Thermoprotei Reysenbach 2002 Desulfurococcales Huber and Stetter 2002 Pyrodictiaceae Burggraf et al. 1997 Hyperthermus Zillig et al. 1991 Pyrodictiaceae Burggraf et al. 1997 Pyrolobus Blöchl et al. 1999 Pyrodictium Stetter et al. 1984 Hyperthermus butylicus Zillig et al. 1991 Reysenbach A.-L. Zillig W. Garrity G.M. Boone D.R. Castenholz R.W. Genus II. Hyperthermus gen. nov. 2001 1 2 195 Bergey's Manual of Systematic Bacteriology Springer New York Zillig W. Holz I. Wunderl S. Hyperthermus butylicus gen. nov., sp. nov., a hyperthermophilic, anaerobic, peptide-fermenting, facultatively H2S-generating archaeobacterium. 1991 41 1 169 170 International Journal of Systematic Bacteriology Int J Syst Bacteriol 0020-7713 10.1099/00207713-41-1-169