[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain Bacteria Woese et al. 1990
     Phylum Firmicutes corrig. Gibbons and Murray 1978 (Approved Lists 1980)
       Class "Clostridia" Garrity et al. 2001 nom. ined. see Class Clostridia Rainey 2010
         Order Clostridiales Prévot 1953 (Approved Lists 1980)
           Family "Lachnospiraceae" nom. inval. 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 Anaerostipes Schwiertz et al. 2002
             05 Genus Butyrivibrio Bryant and Small 1956 (Approved Lists 1980)
             06 Genus Catenibacterium Kageyama and Benno 2000
             07 Genus Catonella Moore and Moore 1994
             08 Genus Coprococcus Holdeman and Moore 1974 (Approved Lists 1980)
             09 Genus Johnsonella Moore and Moore 1994
             10 Genus Lachnobacterium Whitford et al. 2001
             11 Genus Oribacterium Carlier et al. 2004
             12 Genus Pseudobutyrivibrio van Gylswyk et al. 1996
             13 Genus Roseburia Stanton and Savage 1983
             14 Genus Ruminococcus Sijpesteijn 1948 (Approved Lists 1980)
             15 Genus Shuttleworthia Downes et al. 2002
             16 Genus Sporobacterium Mechichi et al. 1999