Filifactor Collins et al. 1994 Filifactor villosus (Love et al. 1979) Collins 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 Eubacteriales Buchanan 1917 (Approved Lists 1980) emend. Tindall 2019 Peptostreptococcaceae Ezaki 2010 Filifactor Collins et al. 1994 Peptostreptococcaceae Ezaki 2010 Peptostreptococcus Kluyver and van Niel 1936 (Approved Lists 1980) emend. Ezaki et al. 2001 Tepidibacter Slobodkin et al. 2003 emend. Tan et al. 2012 Asaccharospora Gerritsen et al. 2014 Romboutsia Gerritsen et al. 2014 emend. Wang et al. 2015 Intestinibacter Gerritsen et al. 2014 Peptoanaerobacter Sizova et al. 2016 Clostridioides Lawson et al. 2016 Wukongibacter Li et al. 2016 Maledivibacter Li et al. 2016 Paramaledivibacter Li et al. 2016 Terrisporobacter Gerritsen et al. 2014 Peptoclostridium Yutin and Galperin 2013 non Peptoclostridium Galperin et al. 2016 Peptoclostridium Galperin et al. 2016 non Peptoclostridium Yutin and Galperin 2013 Peptacetobacter Chen et al. 2020 Criibacterium Maheux et al. 2021 Filifactor alocis (Cato et al. 1985) Jalava and Eerola 1999 Filifactor villosus (Love et al. 1979) Collins et al. 1994 Jalava J. Eerola E. Phylogenetic analysis of Fusobacterium alocis and Fusobacterium sulci based on 16S rRNA gene sequences: proposal of Filifactor alocis (Cato, Moore and Moore) comb. nov. and Eubacterium sulci (Cato, Moore and Moore) comb. nov. 1999 49 4 1375 1379 International Journal of Systematic Bacteriology Int J Syst Bacteriol 0020-7713 10.1099/00207713-49-4-1375 10555315 Collins M.D. Lawson P.A. Willems A. Cordoba J.J. Fernandez-Garayzabal J. Garcia P. Cai J. Hippe H. Farrow J.A.E. The phylogeny of the genus Clostridium: proposal of five new genera and eleven new species combinations. 1994 44 4 812 826 International Journal of Systematic Bacteriology Int J Syst Bacteriol 0020-7713 10.1099/00207713-44-4-812 7981107