Clostridiaceae Pribram 1933 (Approved Lists 1980) emend. Spring 2021

Clostridium Prazmowski 1880 (Approved Lists 1980) emend. Lawson and Rainey 2016

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

Clostridiaceae Pribram 1933 (Approved Lists 1980) emend. Spring 2021

Eubacteriales Buchanan 1917 (Approved Lists 1980) emend. Tindall 2019

Eubacteriaceae Ludwig et al. 2010

Caldicoprobacteraceae Yokoyama et al. 2010

Christensenellaceae Morotomi et al. 2012

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

Geosporobacter Klouche et al. 2007

Tindallia Kevbrin et al. 1999

Thermobrachium Engle et al. 1996

Caloranaerobacter Wery et al. 2001

Caminicella Alain et al. 2002

Natronoincola (sic) Zhilina et al. 1999

Natronincola corrig. Zhilina et al. 1999

Anoxynatronum Garnova et al. 2003

Anaerobacter Duda et al. 1996

Oxobacter Collins et al. 1994

Lactonifactor Clavel et al. 2007

Thermohalobacter Cayol et al. 2000

Alkaliphilus Takai et al. 2001 emend. Wu et al. 2010

Sarcina Goodsir 1842 emend. Canale-Parola 1974 (Approved Lists 1980)

Sporacetigenium Chen et al. 2006

Tepidimicrobium Slobodkin et al. 2006 emend. Niu et al. 2009

Clostridium Prazmowski 1880 (Approved Lists 1980) emend. Lawson and Rainey 2016

Anaerosporobacter Jeong et al. 2007

Butyricicoccus Eeckhaut et al. 2008

Clostridiisalibacter Liebgott et al. 2008

Lutispora Shiratori et al. 2008

Proteocatella Pikuta et al. 2009

Thermotalea Ogg and Patel 2009

Fervidicella Ogg and Patel 2010

Proteiniclasticum Zhang et al. 2010 emend. Namirimu et al. 2022

Saccharofermentans Chen et al. 2010

Sporosalibacterium Rezgui et al. 2011 emend. Podosokorskaya et al. 2017

Anaerosalibacter Rezgui et al. 2012

Brassicibacter Fang et al. 2012

Salimesophilobacter Zhang et al. 2013

Fonticella Fraj et al. 2013

Oceanirhabdus Pi et al. 2013

Youngiibacter Lawson et al. 2014

Hungatella Kaur et al. 2014

Pseudobacteroides Horino et al. 2014

Anaerosolibacter Hong et al. 2015

Caldisalinibacter Ben Hania et al. 2015

Keratinibaculum Huang et al. 2015

Crassaminicella Lakhal et al. 2015 emend. Li et al. 2021

Haloimpatiens Wu et al. 2016

Hathewaya Lawson and Rainey 2016

Paraclostridium Sasi Jyothsna et al. 2016

Paeniclostridium Sasi Jyothsna et al. 2016

Harryflintia Petzoldt et al. 2016

Serpentinicella Mei et al. 2016

Irregularibacter Lagkouvardos et al. 2016

Anaeromicrobium Zhang et al. 2017

Anaerobacterium Horino et al. 2014

Arthromitus (sic) Snel et al. 1995

Neoarthromitus corrig. Snel et al. 1995

Inediibacterium Alou et al. 2017

Cellulosibacter Watthanalamloet et al. 2012

Caloramator Collins et al. 1994 emend. Ogg and Patel 2011

Isachenkonia Zavarzina et al. 2020

Inconstantimicrobium Wylensek et al. 2021

Anaeromonas Zhang et al. 2022

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