[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 Clostridiaceae Pribram 1933 (Approved Lists 1980)
             Genus Clostridium Prazmowski 1880 (Approved Lists 1980)
               001 Clostridium butyricum Prazmowski 1880 (Approved Lists 1980)
               002 Clostridium aceticum (ex Wieringa 1940) Gottschalk and Braun 1981
               003 Clostridium acetireducens Örlygsson et al. 1996
               004 Clostridium acetobutylicum McCoy et al. 1926 (Approved Lists 1980)
               005 Clostridium acidisoli Kuhner et al. 2000
               006 Clostridium acidurici corrig. (Liebert 1909) Barker 1938 (Approved Lists 1980)
               007 Clostridium aerotolerans van Gylswyk and van der Toorn 1987
               008 Clostridium akagii Kuhner et al. 2000
               009 Clostridium aldrichii Yang et al. 1990
               010 Clostridium algidicarnis Lawson et al. 1995
               011 Clostridium algidixylanolyticum Broda et al. 2000
               012 Clostridium alkalicellulosi corrig. Zhilina et al. 2006
               013 Clostridium aminophilum Paster et al. 1993
               014 Clostridium aminovalericum Hardman and Stadtman 1960 (Approved Lists 1980)
               015 Clostridium amygdalinum Parshina et al. 2003
               016 Clostridium arcticum (ex Jordan and McNicol 1979) Cato et al. 1988
               017 Clostridium argentinense Suen et al. 1988
               018 Clostridium aurantibutyricum Hellinger 1944 (Approved Lists 1980)
               019 Clostridium baratii corrig. (Prévot 1938) Holdeman and Moore 1970 (Approved Lists 1980)
               020 Clostridium bartlettii Song et al. 2004 see Intestinibacter bartlettii (Song et al. 2004) Gerritsen et al. 2014
               021 Clostridium beijerinckii Donker 1926 (Approved Lists 1980)
               022 Clostridium bifermentans (Weinberg and Séguin 1918) Bergey et al. 1923 (Approved Lists 1980)
               023 Clostridium bolteae Song et al. 2003
               024 Clostridium botulinum (van Ermengem 1896) Bergey et al. 1923 (Approved Lists 1980)
               025 Clostridium bowmanii Spring et al. 2003
               026 Clostridium cadaveris (Klein 1899) McClung and McCoy 1957 (Approved Lists 1980)
               027 Clostridium caminithermale Brisbarre et al. 2003
               028 Clostridium carboxidivorans Liou et al. 2005
               029 Clostridium carnis (Klein 1904) Spray 1939 (Approved Lists 1980)
               030 Clostridium celatum Hauschild and Holdeman 1974 (Approved Lists 1980)
               031 Clostridium celerecrescens Palop et al. 1989
               032 Clostridium cellobioparum Hungate 1944 (Approved Lists 1980)
               033 Clostridium cellulofermentans He et al. 1991
               034 Clostridium cellulolyticum Petitdemange et al. 1984
               035 Clostridium cellulosi He et al. 1991
               036 Clostridium cellulovorans Sleat et al. 1985
               037 Clostridium chartatabidum Kelly et al. 1996
               038 Clostridium chauvoei (Arloing et al. 1887) Scott 1928 (Approved Lists 1980)
               039 Clostridium clostridioforme corrig. (Burri and Ankersmit 1906) Kaneuchi et al. 1976 (Approved Lists 1980)
               040 Clostridium coccoides Kaneuchi et al. 1976 (Approved Lists 1980) see Blautia coccoides (Kaneuchi et al. 1976) Liu et al. 2008
               041 Clostridium cochlearium (Douglas et al. 1919) Bergey et al. 1923 (Approved Lists 1980)
               042 Clostridium cocleatum Kaneuchi et al. 1979 (Approved Lists 1980)
               043 Clostridium colicanis Greetham et al. 2003
               044 Clostridium colinum (ex Berkhoff et al. 1974) Berkhoff 1985
               045 Clostridium collagenovorans Jain and Zeikus 1988
               046 Clostridium cylindrosporum (ex Barker and Beck 1942) Andreesen et al. 1985
               047 Clostridium difficile (Hall and O'Toole 1935) Prévot 1938 (Approved Lists 1980)
               048 Clostridium diolis Biebl and Spröer 2003
               049 Clostridium disporicum Horn 1987
               050 Clostridium drakei Liou et al. 2005
               051 Clostridium estertheticum Collins et al. 1993
               052 Clostridium fallax (Weinberg and Séguin 1915) Bergey et al. 1923 (Approved Lists 1980)
               053 Clostridium felsineum (Carbone and Tombolato 1917) Bergey et al. 1939 (Approved Lists 1980)
               054 Clostridium fimetarium Kotsyurbenko et al. 1997
               055 Clostridium formicaceticum corrig. Andreesen et al. 1970 (Approved Lists 1980)
               056 Clostridium frigidicarnis Broda et al. 1999
               057 Clostridium frigoris Spring et al. 2003
               058 Clostridium ganghwense Kim et al. 2006
               059 Clostridium gasigenes Broda et al. 2000
               060 Clostridium ghonii corrig. Prévot 1938 (Approved Lists 1980)
               061 Clostridium glycolicum Gaston and Stadtman 1963 (Approved Lists 1980)
               062 Clostridium grantii Mountfort et al. 1996
               063 Clostridium haemolyticum (Hall 1929) Scott et al. 1935 (Approved Lists 1980)
               064 Clostridium halophilum corrig. Fendrich et al. 1991
               065 Clostridium hathewayi Steer et al. 2002 see Hungatella hathewayi (Steer et al. 2002) Kaur et al. 2014
               066 Clostridium herbivorans Varel et al. 1995
               067 Clostridium hiranonis Kitahara et al. 2001
               068 Clostridium histolyticum (Weinberg and Séguin 1916) Bergey et al. 1923 (Approved Lists 1980)
               069 Clostridium homopropionicum Dörner and Schink 1991
               070 Clostridium hungatei Monserrate et al. 2001
               071 Clostridium hylemonae Kitahara et al. 2000
               072 Clostridium indolis McClung and McCoy 1957 (Approved Lists 1980)
               073 Clostridium innocuum Smith and King 1962 (Approved Lists 1980)
               074 Clostridium intestinale corrig. Lee et al. 1989
               075 Clostridium irregulare corrig. (Choukévitch 1911) Prévot 1938 (Approved Lists 1980)
               076 Clostridium isatidis Padden et al. 1999
               077 Clostridium jejuense Jeong et al. 2004
               078 Clostridium josui Sukhumavasi et al. 1988
               079 Clostridium kluyveri Barker and Taha 1942 (Approved Lists 1980)
               080 Clostridium lactatifermentans van der Wielen et al. 2002
               081 Clostridium lacusfryxellense Spring et al. 2003
               082 Clostridium lentocellum Murray et al. 1987
               083 Clostridium leptum Moore et al. 1976 (Approved Lists 1980)
               084 Clostridium limosum André 1948 (Approved Lists 1980)
               085 Clostridium litorale Fendrich et al. 1991
               086 Clostridium lituseburense (Laplanche and Saissac 1948) McClung and McCoy 1957 (Approved Lists 1980)
               087 Clostridium ljungdahlii Tanner et al. 1993
               088 Clostridium lundense Cirne et al. 2006
               089 Clostridium magnum Schink 1984
               090 Clostridium malenominatum (Weinberg et al. 1937) Spray 1948 (Approved Lists 1980)
               091 Clostridium mangenotii (Prévot and Zimmès-Chaverou 1947) McClung and McCoy 1957 (Approved Lists 1980)
               092 Clostridium mayombei Kane et al. 1992
               093 Clostridium methoxybenzovorans Mechichi et al. 1999
               094 Clostridium methylpentosum Himelbloom and Canale-Parola 1989
               095 Clostridium neopropionicum Tholozan et al. 1995
               096 Clostridium nexile Holdeman and Moore 1974 (Approved Lists 1980)
               097 Clostridium novyi (Migula 1894) Bergey et al. 1923 (Approved Lists 1980)
               098 Clostridium oceanicum Smith 1970 (Approved Lists 1980)
               099 Clostridium orbiscindens Winter et al. 1991
               100 Clostridium oroticum (Wachsman and Barker 1954) Cato et al. 1968 (Approved Lists 1980)
               101 Clostridium papyrosolvens Madden et al. 1982
               102 Clostridium paradoxum Li et al. 1993
               103 Clostridium paraputrificum (Bienstock 1906) Snyder 1936 (Approved Lists 1980)
               104 Clostridium pascui Wilde et al. 1997
               105 Clostridium pasteurianum Winogradsky 1895 (Approved Lists 1980)
               106 Clostridium peptidivorans Mechichi et al. 2000
               107 Clostridium perfringens (Veillon and Zuber 1898) Hauduroy et al. 1937 (Approved Lists 1980)
               108 Clostridium phytofermentans Warnick et al. 2002
               109 Clostridium piliforme (ex Tyzzer 1917) Duncan et al. 1993
               110 Clostridium polysaccharolyticum (van Gylswyk 1981) van Gylswyk et al. 1983
               111 Clostridium populeti Sleat and Mah 1985
               112 Clostridium propionicum Cardon and Barker 1946 (Approved Lists 1980)
               113 Clostridium proteoclasticum Attwood et al. 1996 see Butyrivibrio proteoclasticus (Attwood et al. 1996) Moon et al. 2008
               114 Clostridium proteolyticum Jain and Zeikus 1988
               115 Clostridium psychrophilum Spring et al. 2003
               116 Clostridium puniceum Lund et al. 1981
               117 Clostridium purinilyticum corrig. Dürre et al. 1981
               118 Clostridium putrefaciens (McBryde 1911) Sturges and Drake 1927 (Approved Lists 1980)
               119 Clostridium quinii Svensson et al. 1995
               120 Clostridium ramosum (Veillon and Zuber 1898) Holdeman et al. 1971 (Approved Lists 1980)
               121 Clostridium rectum (Heller 1922) Holdeman and Moore 1972 (Approved Lists 1980)
               122 Clostridium roseum (ex McCoy and McClung 1935) Cato et al. 1988
               123 Clostridium saccharobutylicum Keis et al. 2001
               124 Clostridium saccharolyticum Murray et al. 1982
               125 Clostridium saccharoperbutylacetonicum Keis et al. 2001
               126 Clostridium sardiniense corrig. Prévot 1938 (Approved Lists 1980)
               127 Clostridium sartagoforme corrig. Partansky and Henry 1935 (Approved Lists 1980)
               128 Clostridium scatologenes (Weinberg and Ginsbourg 1927) Prévot 1948 (Approved Lists 1980)
               129 Clostridium schirmacherense Alam et al. 2006
               130 Clostridium scindens Morris et al. 1985
               131 Clostridium septicum (Macé 1889) Ford 1927 (Approved Lists 1980)
               132 Clostridium sordellii (Hall and Scott 1927) Prévot 1938 (Approved Lists 1980)
               133 Clostridium sphenoides (Douglas et al. 1919) Bergey et al. 1923 (Approved Lists 1980)
               134 Clostridium spiroforme Kaneuchi et al. 1979 (Approved Lists 1980)
               135 Clostridium sporogenes (Metchnikoff 1908) Bergey et al. 1923 (Approved Lists 1980)
               136 Clostridium sporosphaeroides Soriano and Soriano 1948 (Approved Lists 1980)
               137 [Clostridium stercorarium] Madden 1983
               138 Clostridium sticklandii Stadtman and McClung 1957 (Approved Lists 1980)
               139 Clostridium straminisolvens Kato et al. 2004
               140 Clostridium subterminale (Hall and Whitehead 1927) Spray 1948 (Approved Lists 1980)
               141 Clostridium symbiosum (Stevens 1956) Kaneuchi et al. 1976 (Approved Lists 1980)
               142 Clostridium termitidis Hethener et al. 1992
               143 Clostridium tertium (Henry 1917) Bergey et al. 1923 (Approved Lists 1980)
               144 Clostridium tetani (Flügge 1886) Bergey et al. 1923 (Approved Lists 1980)
               145 Clostridium tetanomorphum (ex Bulloch et al. 1919) Wilde et al. 1989
               146 Clostridium thermoalcaliphilum Li et al. 1994
               147 Clostridium thermobutyricum Wiegel et al. 1989
               148 Clostridium thermocellum Viljoen et al. 1926 (Approved Lists 1980)
               149 Clostridium thermopalmarium Soh et al. 1991
               150 Clostridium thermopapyrolyticum Méndez et al. 1991
               151 Clostridium thermosuccinogenes Drent et al. 1995
               152 Clostridium thiosulfatireducens Hernández-Eugenio et al. 2002
               153 Clostridium tyrobutyricum van Beynum and Pette 1935 (Approved Lists 1980)
               154 Clostridium uliginosum Matthies et al. 2001
               155 Clostridium ultunense Schnürer et al. 1996
               156 Clostridium vincentii Mountfort et al. 1997
               157 Clostridium viride Buckel et al. 1995
               158 Clostridium xylanolyticum Rogers and Baecker 1991
               159 Clostridium xylanovorans Mechichi et al. 2000