Eubacteriineae Breed et al. 1944 (Approved Lists 1980) 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 Eubacteriineae Breed et al. 1944 (Approved Lists 1980) Eubacteriales Buchanan 1917 (Approved Lists 1980) emend. Tindall 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 Oscillospiraceae Peshkoff 1940 (Approved Lists 1980) emend. Tindall 2019 Incertae sedis 723 Hitch et al. 2021 Eubacteriaceae Ludwig et al. 2010 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 No reference is available 2015 TODO (parker): The circumscription of this Approved Lists name is unclear. The original circumscription of this taxon is unclear.