procaryotes
   Domain Bacteria Woese et al. 1990 stat. inval. see Domain Bacteria Woese et al. 2024
     Phylum Firmicutes (Gibbons and Murray 1978) Garrity and Holt 2001 stat. inval. see Phylum Bacillota Gibbons and Murray 2021
       Class "Clostridia" "Garrity and Holt 2001" nom. nud. see Class Clostridia Rainey 2010
         Order Clostridiales Prévot 1953 (Approved Lists 1980) see Order Eubacteriales Buchanan 1917 (Approved Lists 1980)
           Family "Lachnospiraceae" "Garrity and Holt 2001" nom. nud. see Family Lachnospiraceae Rainey 2010
             01 Genus Lachnospira Bryant and Small 1956 (Approved Lists 1980)
             02 Genus Acetitomaculum Greening and Leedle 1995
             03 Genus Anaerofilum Zellner et al. 1996
             04 Genus Butyrivibrio Bryant and Small 1956 (Approved Lists 1980)
             05 Genus Catonella Moore and Moore 1994
             06 Genus Coprococcus Holdeman and Moore 1974 (Approved Lists 1980)
             07 Genus Johnsonella Moore and Moore 1994
             08 Genus Pseudobutyrivibrio van Gylswyk et al. 1996
             09 Genus Roseburia Stanton and Savage 1983
             10 Genus Ruminococcus Sijpesteijn 1948 (Approved Lists 1980)
             11 Genus Sporobacterium Mechichi et al. 1999