Eubacteriales Buchanan 1917 (Approved Lists 1980) emend. Tindall 2019 Eubacteriales Buchanan 1917 (Approved Lists 1980) emend. Tindall 2019 Eubacterium Prévot 1938 (Approved Lists 1980) emend. Cato et al. 1981 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 Clostridia Rainey 2010 Haloanaerobiales (sic) Rainey et al. 1995 Halanaerobiales corrig. Rainey et al. 1995 Natranaerobiales Mesbah et al. 2007 Thermoanaerobacterales (Garrity and Holt 2001) Wiegel 2010 emend. Lv et al. 2020 Clostridiales Prévot 1953 (Approved Lists 1980) Thermoanaerobacteriales Garrity and Holt 2001 Syntrophomonadales Sorokin et al. 2016 Thermosediminibacterales Zhang et al. 2019 Thermovenabulales Parks et al. 2018 Moorellales Lv et al. 2020 Koleobacterales Sakamoto et al. 2021 Monoglobacales None 2015 Incertae sedis 650 Sorokin et al. 2021 Borkfalkiales corrig. Hildebrand et al. 2019 Comantemales (sic) Hildebrand et al. 2019 Eubacteriaceae Ludwig et al. 2010 Caldicoprobacteraceae Yokoyama et al. 2010 Christensenellaceae Morotomi et al. 2012 Clostridiaceae Pribram 1933 (Approved Lists 1980) emend. Spring 2021 Defluviitaleaceae Jabari et al. 2012 Gracilibacteraceae Lee et al. 2010 Heliobacteriaceae Asao and Madigan 2010 Lachnospiraceae Rainey 2010 Peptococcaceae Rogosa 1971 (Approved Lists 1980) emend. Lv et al. 2020 Peptostreptococcaceae Ezaki 2010 Ruminococcaceae Rainey 2010 Syntrophomonadaceae Zhao et al. 1993 emend. Zhang et al. 2019 Eubacteriineae Breed et al. 1944 (Approved Lists 1980) Oscillospiraceae Peshkoff 1940 (Approved Lists 1980) emend. Tindall 2019 Incertae sedis 723 Hitch et al. 2021 Breed R.S. Breed R.S. Murray E.G.D. Smith N.R. Considerations influencing the classification used in this edition of the Manual 1957 7 4 14 Bergey's Manual of Determinative Bacteriology The Williams and Wilkins Co. Baltimore Hitch T.C.A. Riedel T. Oren A. Overmann J. Lawley T.D. Clavel T. Automated analysis of genomic sequences facilitates high-throughput and comprehensive description of bacteria 2021 1 16 ISME Communications ISME Commun 2730-6151 10.1038/s43705-021-00017-z Gerritsen J. Fuentes S. Grievink W. van Niftrik L. Tindall B.J. Timmerman H.M. Rijkers G.T. Smidt H. Characterization of Romboutsia ilealis gen. nov., sp. nov., isolated from the gastro-intestinal tract of a rat, and proposal for the reclassification of five closely related members of the genus Clostridium into the genera Romboutsia gen. nov., Intestinibacter gen. nov., Terrisporobacter gen. nov. and Asaccharospora gen. nov. 2014 64 5 1600 1616 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/ijs.0.059543-0 24480908 Breed R.S. Murray E.G.D. Hitchens P. The outline used in the Bergey's Manual of Determinative Becteriology 1944 8 4 255 260 Bacteriological Reviews Bacteriol Rev 0005-3678 1098-5557 16350097 Tindall B.J. The names Hungateiclostridium Zhang et al. 2018, Hungateiclostridium thermocellum (Viljoen et al. 1926) Zhang et al. 2018, Hungateiclostridium cellulolyticum (Patel et al. 1980) Zhang et al. 2018, Hungateiclostridium aldrichii (Yang et al. 1990) Zhang et al. 2018, Hungateiclostridium alkalicellulosi (Zhilina et al. 2006) Zhang et al. 2018, Hungateiclostridium clariflavum (Shiratori et al. 2009) Zhang et al. 2018, Hungateiclostridium straminisolvens (Kato et al. 2004) Zhang et al. 2018 and Hungateiclostridium saccincola (Koeck et al. 2016) Zhang et al. 2018 contravene Rule 51b of the International Code of Nomenclature of Prokaryotes and require replacement names in the genus Acetivibrio Patel et al. 1980. 2019 69 12 3927 3932 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/ijsem.0.003685 31526446 Clostridiales Prévot 1953 (Approved Lists 1980) Buchanan R.E. Studies on the Nomenclature and Classification of the Bacteria: III. The Families of the Eubacteriales. 1917 2 4 347 350 Journal of Bacteriology J Bacteriol 0021-9193 1098-5530 16558750 Gerritsen J. Fuentes S. Grievink W. van Niftrik L. Tindall B.J. Timmerman H.M. Rijkers G.T. Smidt H. Characterization of Romboutsia ilealis gen. nov., sp. nov., isolated from the gastro-intestinal tract of a rat, and proposal for the reclassification of five closely related members of the genus Clostridium into the genera Romboutsia gen. nov., Intestinibacter gen. nov., Terrisporobacter gen. nov. and Asaccharospora gen. nov. 2014 64 5 1600 1616 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/ijs.0.059543-0 24480908 Skerman V.B.D. McGowan V. Sneath P.H.A. Approved Lists of Bacterial Names 1980 30 1 225 420 International Journal of Systematic Bacteriology Int J Syst Bacteriol 0020-7713 10.1099/00207713-30-1-225 Tindall B.J. The names Hungateiclostridium Zhang et al. 2018, Hungateiclostridium thermocellum (Viljoen et al. 1926) Zhang et al. 2018, Hungateiclostridium cellulolyticum (Patel et al. 1980) Zhang et al. 2018, Hungateiclostridium aldrichii (Yang et al. 1990) Zhang et al. 2018, Hungateiclostridium alkalicellulosi (Zhilina et al. 2006) Zhang et al. 2018, Hungateiclostridium clariflavum (Shiratori et al. 2009) Zhang et al. 2018, Hungateiclostridium straminisolvens (Kato et al. 2004) Zhang et al. 2018 and Hungateiclostridium saccincola (Koeck et al. 2016) Zhang et al. 2018 contravene Rule 51b of the International Code of Nomenclature of Prokaryotes and require replacement names in the genus Acetivibrio Patel et al. 1980. 2019 69 12 3927 3932 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/ijsem.0.003685 31526446