Youngiibacter multivorans (Tanaka et al. 1992) Lawson et al. 2014 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 Eubacteriales Buchanan 1917 (Approved Lists 1980) emend. Tindall 2019 Clostridiaceae Pribram 1933 (Approved Lists 1980) emend. Spring 2021 Youngiibacter Lawson et al. 2014 Youngiibacter multivorans (Tanaka et al. 1992) Lawson et al. 2014 Youngiibacter Lawson et al. 2014 Youngiibacter fragilis Lawson et al. 2014 Youngiibacter multivorans (Tanaka et al. 1992) Lawson et al. 2014 Acetivibrio multivorans Tanaka et al. 1992 List Editor Validation of the publication of new names and new combinations previously effectively published outside the IJSB. List No. 40. 1992 42 1 191 192 International Journal of Systematic Bacteriology Int J Syst Bacteriol 0020-7713 10.1099/00207713-42-1-191 1736967 Lawson P.A. Wawrik B. Allen T.D. Johnson C.N. Marks C.R. Tanner R.S. Harriman B.H. Strąpoć D. Callaghan A.V. Youngiibacter fragilis gen. nov., sp. nov., isolated from natural gas production-water and reclassification of Acetivibrio multivorans as Youngiibacter multivorans comb. nov. 2014 64 1 198 205 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/ijs.0.053728-0 24048874