Hydrogenobaculum Stöhr et al. 2001 Hydrogenobaculum acidophilum (Shima and Suzuki 1993) Stöhr et al. 2001 Universal Root Woese et al. 1990 Bacteria (None 2015) Woese et al. 1990 Aquificota corrig. Reysenbach 2021 Aquificae (sic) Reysenbach 2021 non Aquificae Reysenbach 2002 Aquificae Reysenbach 2002 emend. Gupta and Lali 2013 non Aquificae Reysenbach 2021 Aquificales Reysenbach 2002 emend. Gupta and Lali 2013 Aquificaceae Reysenbach 2002 emend. Gupta and Lali 2013 Hydrogenobaculum Stöhr et al. 2001 Aquificaceae Reysenbach 2002 emend. Gupta and Lali 2013 Calderobacterium Kryukov et al. 1984 Thermocrinis Huber et al. 1999 Hydrogenobacter Kawasumi et al. 1984 Hydrogenivirga Nakagawa et al. 2004 Aquifex Huber et al. 1992 Hydrogenobaculum sp. None 2015 Hydrogenobaculum acidophilum (Shima and Suzuki 1993) Stöhr et al. 2001 Stöhr R. Waberski A. Völker H. Tindall B.J. Thomm M. Hydrogenothermus marinus gen. nov., sp. nov., a novel thermophilic hydrogen-oxidizing bacterium, recognition of Calderobacterium hydrogenophilum as a member of the genus Hydrogenobacter and proposal of the reclassification of Hydrogenobacter acidophilus as Hydrogenobaculum acidophilum gen. nov., comb. nov., in the phylum 'Hydrogenobacter/Aquifex'. 2001 51 5 1853 1862 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/00207713-51-5-1853 11594618 No reference is available 2015