Sulfuracidifex Itoh et al. 2020 Sulfuracidifex Itoh et al. 2020 Sulfuracidifex tepidarius Itoh et al. 2020 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 Sulfolobales Stetter 1989 Sulfolobaceae Stetter 1989 Sulfuracidifex Itoh et al. 2020 Sulfolobaceae Stetter 1989 Sulfurisphaera Kurosawa et al. 1998 emend. Tsuboi et al. 2018 Acidianus (sic) Segerer et al. 1986 emend. Plumb et al. 2007 Acidijanus corrig. Segerer et al. 1986 emend. Plumb et al. 2007 Metallosphaera Huber et al. 1989 Stygiolobus Segerer et al. 1991 Sulfurococcus Golovacheva et al. 1995 Sulfolobus Brock et al. 1972 (Approved Lists 1980) Desulfurolobus Zillig et al. 1987 Sulfodiicoccus Sakai and Kurosawa 2017 Saccharolobus Sakai and Kurosawa 2018 Sulfuracidifex tepidarius Itoh et al. 2020 Sulfuracidifex metallicus (Huber and Stetter 1992) Itoh et al. 2020 Itoh T. Miura T. Sakai H.D. Kato S. Ohkuma M. Takashina T. Sulfuracidifex tepidarius gen. nov., sp. nov. and transfer of Sulfolobus metallicus Huber and Stetter 1992 to the genus Sulfuracidifex as Sulfuracidifex metallicus comb. nov. 2020 70 3 1837 1842 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/ijsem.0.003981 31958046 Itoh T. Miura T. Sakai H.D. Kato S. Ohkuma M. Takashina T. Sulfuracidifex tepidarius gen. nov., sp. nov. and transfer of Sulfolobus metallicus Huber and Stetter 1992 to the genus Sulfuracidifex as Sulfuracidifex metallicus comb. nov. 2020 70 3 1837 1842 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/ijsem.0.003981 31958046