Thermoanaerobium acetigenum Nielsen et al. 1994 Universal Root Woese et al. 1990 Bacteria (None 2015) Woese et al. 1990 Firmicutes (sic) Gibbons and Murray 2021 Bacillota corrig. Gibbons and Murray 2021 Firmacutes (sic) Gibbons and Murray 2021 Clostridia Rainey 2010 Thermoanaerobacterales (Garrity and Holt 2001) Wiegel 2010 emend. Lv et al. 2020 Thermoanaerobacteraceae (Garrity and Holt 2001) Wiegel 2010 Thermoanaerobacter Wiegel and Ljungdahl 1982 emend. Lee et al. 2007 Thermoanaerobium acetigenum Nielsen et al. 1994 Thermoanaerobacter Wiegel and Ljungdahl 1982 emend. Lee et al. 2007 Thermoanaerobium brockii Zeikus et al. 1983 Thermoanaerobium acetigenum Nielsen et al. 1994 Caldicellulosiruptor acetigenus (Nielsen et al. 1994) Onyenwoke et al. 2006 List Editor Validation list no. 49. Validation of the publication of new names and new combinations previously effectively published outside the IJSB. 1994 44 2 370 371 International Journal of Systematic Bacteriology Int J Syst Bacteriol 0020-7713 10.1099/00207713-44-2-370 Habib N. Rao M.P.N. Xiao M. Jan S.A. Li W.-J. Genome-based reclassification of Caldicellulosiruptor lactoaceticus and Caldicellulosiruptor kristjanssonii as later heterotypic synonyms of Caldicellulosiruptor acetigenus. 2021 71 8 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/ijsem.0.004927 34424833 Onyenwoke R.U. Lee Y.J. Dabrowski S. Ahring B.K. Wiegel J. Reclassification of Thermoanaerobium acetigenum as Caldicellulosiruptor acetigenus comb. nov. and emendation of the genus description. 2006 56 6 1391 1395 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/ijs.0.63723-0 16738119 note: Accession number AY772476 refers to clone 1 and AY772477 refers to clone 2. Nielsen P. Mathrani I.M. Ahring B.K. Thermoanaerobium acetigenum spec. nov., a new anaerobic, extremely thermophilic, xylanolytic non-spore-forming bacterium isolated from an Icelandic hot spring. 1993 159 460 464 Archives of Microbiology Arch Microbiol 0302-8933 1432-072X 10.1007/BF00288594