As of October 2022, there are 164 validly published species in ''

Clostridium ''Clostridium'' is a genus of anaerobic, Gram-positive bacteria. Species of ''Clostridium'' inhabit soils and the intestinal tract of animals, including humans. This genus includes several significant human pathogens, including the causative ag ...

'',Page ''Genus: Clostridium'' on as well as 38 species described but not validly published.

Species

* ''

Clostridium aceticum ''Clostridium aceticum'' is a species of bacterium in the genus Clostridium. Its name comes from the acetic acid Acetic acid , systematically named ethanoic acid , is an acidic, colourless liquid and organic compound with the chemical for ...

'' * '' Clostridium acetireducens'' * ''

Clostridium acetobutylicum ''Clostridium acetobutylicum'', American Type Culture Collection, ATCC 824, is a commercially valuable bacterium sometimes called the "Weizmann Organism", after Jewish Russian-born biochemist Chaim Weizmann. A senior lecturer at the University o ...

'' * '' Clostridium acidisoli'' * '' Clostridium aciditolerans'' * '' Clostridium aestuarii'' * '' Clostridium akagii'' * '' Clostridium algidicarnis'' * '' Clostridium algifaecis'' * '' Clostridium algoriphilum'' * '' Clostridium amazonense'' * '' Clostridium aminophilum'' * '' Clostridium amylolyticum'' * '' Clostridium arbusti'' * '' Clostridium arcticum'' cae * ''

Clostridium argentinense ''Clostridium argentinense'' is an anaerobic, motile, gram-positive bacterium. Some bacilli now identified as ''Cl. argentinense'' were previously classified as either '' Cl. subterminale'', '' Cl. hastiforme'', or '' Cl. botulinum'' toxin gro ...

'' * ''

Clostridium aurantibutyricum ''Clostridium aurantibutyricum'' is a species of bacteria in the genus ''Clostridium ''Clostridium'' is a genus of anaerobic, Gram-positive bacteria. Species of ''Clostridium'' inhabit soils and the intestinal tract of animals, including hum ...

'' * ''

Clostridium autoethanogenum ''Clostridium autoethanogenum'' is an anaerobic bacterium that produces ethanol from carbon monoxide, in so-called syngas fermentation, being one of the few known microorganisms to do so. It is gram-positive, spore-forming, rod-like, motile ...

'' * '' Clostridium baratii'' * ''

Clostridium beijerinckii ''Clostridium beijerinckii'' is a gram positive, rod shaped, motile bacterium of the genus ''Clostridium''. It has been isolated from feces and soil. Produces oval to subterminal spores. it is named after Martinus Beijerinck who is a Dutch bacte ...

'' * '' Clostridium bornimense'' * ''

Clostridium botulinum ''Clostridium botulinum'' is a Gram-positive, rod-shaped, anaerobic, spore-forming, motile bacterium with the ability to produce the neurotoxin botulinum. The botulinum toxin can cause botulism, a severe flaccid paralytic disease in humans an ...

'' * '' Clostridium bowmanii'' * ''

Clostridium butyricum ''Clostridium butyricum'' is a strictly anaerobic organism, anaerobic endospore-forming Gram-positive butyric acid–producing bacillus subsisting by means of fermentation (biochemistry), fermentation using an intracellularly accumulated amylope ...

'' * ''

Clostridium cadaveris ''Clostridium cadaveris'' is an enteric, gas-forming, motile, strictly anaerobic gram-positive bacterium of the genus ''Clostridium''. First described by Klein in 1899, it was noted to be the most prominent bacteria during human decomposition; hi ...

'' * ''

Clostridium carboxidivorans ''Clostridium carboxidivorans'' is a Gram-positive anaerobic, spore-forming and motile bacterium from the genus ''Clostridium'' which has been isolated from an agricultural lagoon in Oklahoma in the United States. ''Clostridium carboxidivorans' ...

'' * '' Clostridium carnis'' * '' Clostridium cavendishii'' * '' Clostridium celatum'' * '' Clostridium cellulofermentans'' * '' Clostridium cellulosi'' * '' Clostridium cellulovorans'' * '' Clostridium chartatabidum'' * ''

Clostridium chauvoei ''Clostridium chauvoei'' is an anaerobic, motile, Gram-positive bacterium. It is a soil-borne pathogen that can cause blackleg in cattle and sheep. It is named after Auguste Chauveau, a French bacteriologist and veterinarian. It is mainly cons ...

'' * '' Clostridium chromiireducens'' * '' Clostridium cochlearium'' * '' Clostridium colletant'' * ''

Clostridium cocleatum ''Thomasclavelia cocleata'' is a Gram-positive and anaerobic Anaerobic means "living, active, occurring, or existing in the absence of free oxygen", as opposed to aerobic which means "living, active, or occurring only in the presence of oxygen." ...

Clostridium haemolyticum ''Clostridium haemolyticum'' is a species of bacteria in the family of Clostridiaceae. Based on 16S-rDNA sequence analysis, ''C. haemolyticum'' is closely related to '' C. novyi'' and ''C. botulinum ''Clostridium botulinum'' is a Gram-posit ...

'' * '' Clostridium herbivorans'' * '' Clostridium homopropionicum'' * '' Clostridium huakuii'' * '' Clostridium hydrogeniformans'' * '' Clostridium hylemonae'' * '' Clostridium jeddahense'' * ''

Clostridium innocuum ''Clostridium innocuum'' is an anaerobic, non-motile, gram-positive bacterium that reproduces by sporulation. While there are over 130 species of Clostridium, ''C. innocuum'' is the third most commonly isolated. Although it is not normally consid ...

'' * '' Clostridium intestinale'' * '' Clostridium isatidis'' * ''

Clostridium kluyveri ''Clostridium kluyveri'' (CLOKL) is an anaerobic, motile, gram-positive bacterium. It is named after the Dutch microbiologist Albert Kluyver Albert Jan Kluyver ForMemRS (June 3, 1888 – May 14, 1956) was a Dutch microbiologist and biochem ...

'' * '' Clostridium lacusfryxellense'' * ''

Clostridium leptum ''Clostridium leptum'' is a bacterium species in the genus ''Clostridium''. It forms a subgroup of human fecal microbiota. Its reduction relative to other members of the gut microbiota has been observed in patients with inflammatory bowel disea ...

'' * '' Clostridium liquoris'' * ''

Clostridium ljungdahlii ''Clostridium ljungdahlii'' is an anaerobic, rod-shaped, motile, endospore-forming, gram-positive bacterium. It is named after the biochemist Lars G. Ljungdahl. When originally harvested from the waste matter of animals, it tended to produce acet ...

'' * '' Clostridium lundense'' * '' Clostridium luticellarii'' * '' Clostridium magnum'' * '' Clostridium malenominatum'' * '' Clostridium methoxybenzovorans'' * '' Clostridium methylpentosum'' * '' Clostridium moniliforme'' * '' Clostridium nexile'' * '' Clostridium nitrophenolicum'' * ''

Clostridium novyi ''Clostridium novyi'' (oedematiens) a Gram-positive, endospore- forming, obligate anaerobic bacteria of the class Clostridia. It is ubiquitous, being found in the soil and faeces. It is pathogenic, causing a wide variety of diseases in man and a ...

'' * '' Clostridium oceanicum'' * '' Clostridium oryzae'' * '' Clostridium paradoxum'' * '' Clostridium paraputrificum'' * '' Clostridium pascui'' * ''

Clostridium pasteurianum ''Clostridium pasteurianum'' (previously known as ''Clostridium pastorianum'') is a bacterium discovered in 1890 by the Russian microbiologist Sergei Winogradsky. It was the first free living (non-symbiotic) micro-organism discovered that could ...

'' * '' Clostridium peptidivorans'' * ''

Clostridium perfringens ''Clostridium perfringens'' (formerly known as ''C. welchii'', or ''Bacillus welchii'') is a Gram-positive, rod-shaped, anaerobic, spore-forming pathogenic bacterium of the genus '' Clostridium''. ''C. perfringens'' is ever-present in nature an ...

'' * ''

Clostridium phytofermentans ''Clostridium phytofermentans'' (also called ''Lachnoclostridium phytofermentans'') is an obligately anaerobic rod-shaped spore-forming, Gram-positive bacterium in the family Lachnospiraceae. It is a model organism of interest for its ability t ...

'' * '' Clostridium piliforme'' * '' Clostridium polysaccharolyticum'' * '' Clostridium polyendosporum'' * '' Clostridium populeti'' * '' Clostridium psychrophilum'' * '' Clostridium puniceum'' * '' Clostridium punense'' * '' Clostridium putrefaciens'' * '' Clostridium putrificum'' * '' Clostridium quinii'' * "'' Clostridium ragsdalei''" * ''

Clostridium ramosum ''Clostridium'' is a genus of anaerobic, Gram-positive bacteria. Species of ''Clostridium'' inhabit soils and the intestinal tract of animals, including humans. This genus includes several significant human pathogens, including the causative ag ...

'' * '' Clostridium roseum'' * ''

Clostridium saccharobutylicum ''Clostridium saccharobutylicum'' is an indole and notably acetone, butanol and ethanol-producing bacterium, with type strain DSM DSM or dsm may refer to: Science and technology * Deep space maneuver * Design structure matrix or dependency str ...

'' * '' Clostridium saccharogumia'' * ''

Clostridium saccharoperbutylacetonicum ''Clostridium saccharoperbutylacetonicum'' is an indole and notably butanol Butanol (also called butyl alcohol) is a four-carbon alcohol with a formula of C4 H9 O H, which occurs in five isomeric structures (four structural isomers), from a s ...

'' * '' Clostridium sardiniense'' * '' Clostridium sartagoforme'' * '' Clostridium saudiense'' * '' Clostridium senegalense'' * '' Clostridium scatologenes'' * '' Clostridium schirmacherense'' * '' Clostridium scindens'' * ''

Clostridium septicum ''Clostridium septicum'' is a gram positive, spore forming, obligate anaerobic bacterium. ''Clostridium septicum'' can cause gas gangrene, but unlike other Clostridium species like ''Clostridium perfringens'', no trauma is necessary at the si ...

'' * '' Clostridium spiroforme'' * ''

Clostridium sporogenes ''Clostridium sporogenes'' is a species of Gram-positive bacteria that belongs to the genus ''Clostridium''. Like other strains of ''Clostridium'', it is an anaerobic, rod-shaped bacterium that produces oval, subterminal endospores and is commonl ...

'' * '' Clostridium sporosphaeroides'' * ''

Clostridium subterminale ''Clostridium'' is a genus of anaerobic, Gram-positive bacteria. Species of ''Clostridium'' inhabit soils and the intestinal tract of animals, including humans. This genus includes several significant human pathogens, including the causative age ...

'' * '' Clostridium sulfidigenes'' * '' Clostridium swellfunianum'' * '' Clostridium symbiosum'' * '' Clostridium tagluense'' * '' Clostridium tarantellae'' * '' Clostridium tepidiprofundi'' * '' Clostridium termitidis'' * '' Clostridium tertium'' * ''

Clostridium tetani ''Clostridium tetani'' is a common soil bacterium and the causative agent of tetanus. Vegetative cells of ''Clostridium tetani'' are usually rod-shaped and up to 2.5 μm long, but they become enlarged and tennis racket- or drumstick-shaped when ...

'' * ''

Clostridium tetanomorphum ''Clostridium'' is a genus of obligate anaerobe, anaerobic, Gram-positive bacteria. Species of ''Clostridium'' inhabit soils and the intestinal tract of animals, including humans. This genus includes several significant human pathogens, includin ...

'' * '' Clostridium thermoalcaliphilum'' * '' Clostridium thermobutyricum'' * '' Clostridium thermopalmarium'' * '' Clostridium thermopapyrolyticum'' * '' Clostridium thermosuccinogenes'' * '' Clostridium thiosulfatireducens'' * ''

Clostridium tyrobutyricum ''Clostridium tyrobutyricum'' is a rod-shaped, Gram-positive bacterium that grows under anaerobic conditions and produces butyric acid, acetic acid and hydrogen gas as the major fermentation products from glucose and xylose. The late-blowing def ...

'' * '' Clostridium uliginosum'' * '' Clostridium vincentii'' * '' Clostridium viride'' * '' Clostridium vulturis''

Species formerly placed in ''Clostridium''

* Order Caryophanales ** Family

Paenibacillaceae The Paenibacillaceae are a family of Gram-positive bacteria Bacteria (; singular: bacterium) are ubiquitous, mostly free-living organisms often consisting of one biological cell. They constitute a large domain of prokaryotic microorgani ...

*** Genus ''

Oxalophagus ''Oxalophagus'' is a genus of bacteria belonging to the Bacillota. Up to now, only one species of this genus is known, ''Oxalophagus oxalicus'' See also *''Oxalophagus oxalicus'' References

Paenibacillaceae Monotypic bacteria genera Ba ...

'': '' Clostridium oxalicum'', reassigned in 1994. *** Genus ''

Paenibacillus ''Paenibacillus'' is a genus of facultative anaerobic, endospore-forming bacteria, originally included within the genus ''Bacillus'' and then reclassified as a separate genus in 1993.Ash C, Priest FG, Collins MD: Molecular identification of rRNA ...

'': '' Clostridium durum'', reassigned in 1994. * Order

Eubacteriales The Eubacteriales are an order of bacteria placed within the class Clostridia. Families Eubacteriales comprises the following families: * " Betainaceae" Jones et al. 2019 * " Bianqueaceae" Liu et al. 2021 * " Borkfalkiaceae" Hildebrand, Pallen ...

** Family

Clostridiaceae The Clostridiaceae are a family of the bacterial class Clostridia, and contain the genus '' Clostridium''. The family Clostridiaceae (scientific name) defined by the taxonomic outline of '' Bergey's Manual of Systematic Bacteriology '' contains ...

*** Genus '' Asaccharospora'': '' Clostridium irregulare'', reassigned in 2014. *** Genus ''

Caloramator ''Caloramator'', is a genus of bacteriae belonging to the Bacillota The Bacillota (synonym Firmicutes) are a phylum of bacteria, most of which have gram-positive cell wall structure. The renaming of phyla such as Firmicutes in 2021 remains con ...

'': '' Clostridium fervidum'', reassigned in 1994. *** Genus '' Hathewaya'': ''

Clostridium histolyticum ''Hathewaya histolytica'' (formerly ''Clostridium histolyticum'') is a species of bacteria found in feces and the soil. It is a motile, gram-positive, aerotolerant anaerobe. ''H. histolytica'' is pathogenic in many species, including guinea pigs ...

'', '' C. limosum'' and '' C. proteolyticum'', reassigned in 2016. *** Genus '' Hungatella'': '' Clostridium hathewayi'', reassigned in 2014. *** Genus '' Intestinibacter'': '' Clostridium bartlettii'', reassigned in 2014. *** Genus ''

Oxobacter ''Oxobacter'' is a genus of Gram-positive obligately anaerobic rod-shaped acetogenic bacteria. The sole species in the genus is ''Oxobacter pfennigii'', formerly known as ''Clostridium pfennigii''. This endospore-forming microorganism cataboliz ...

'': '' Clostridium pfennigii'', reassigned in 1994. *** Genus '' Paeniclostridium'': '' Clostridium ghonii'' and '' C. sordellii'', reassigned in 2016. *** Genus '' Paraclostridium'': ''

Clostridium bifermentans ''Paraclostridium bifermentans'', formerly known as ''Clostridium bifermentans'' and abbreviated CLOBI, is an anaerobic, motile, gram-positive bacterium. Toxins and mosquito larvae A certain subspecies, ''Clostridium bifermentans'' subsp. Malays ...

'', reassigned in 2016. *** Genus '' Romboutsia'': '' Clostridium lituseburense'', reassugned in 2014. *** Genus ''

Sarcina The ''sarcina'' was the marching pack carried by Roman legionaries The Roman legion ( la, legiō, ) was the largest military unit of the Roman army, composed of 5,200 infantry and 300 equites (cavalry) in the period of the Roman Republ ...

'': ''

Clostridium maximum ''Sarcina maxima'' is a bacterium from the genus ''Sarcina'' which has been isolated from faeces of an elephant Elephants are the largest existing land animals. Three living species are currently recognised: the African bush elephant, the ...

and C. ventriculi''. Originally described in ''Sarcina'', proposed to be moved to ''Clostridium'' in 2016 but remained due to ''Sarcina'' being the older genus. *** Genus ''

Terrisporobacter ''Terrisporobacter'' is a genus of Gram-positive spore-forming bacteria in the family Peptostreptococcaceae. Members of this genus were once classified as Clostridium ''Clostridium'' is a genus of anaerobic, Gram-positive bacteria. Species o ...

'': '' Clostridium glycolicus'' and '' C. mayombei'', reassigned in 2014. ** Family

Eubacteriaceae The Eubacteriaceae are a family of Gram-positive bacteria in the order Clostridiales. Phylogeny The currently accepted taxonomy based on the List of Prokaryotic names with Standing in Nomenclature (LPSN) and the National Center for Biotechnology ...

*** Genus ''

Eubacteria Bacteria (; singular: bacterium) are ubiquitous, mostly free-living organisms often consisting of one Cell (biology), biological cell. They constitute a large domain (biology), domain of prokaryotic microorganisms. Typically a few micrometr ...

'': '' Clostridium barkeri'', reassigned in 1994. ** Family

Lachnospiraceae The Lachnospiraceae are a family of obligately anaerobic, variably spore-forming bacteria in the order Eubacteriales that ferment diverse plant polysaccharides to short-chain fatty acids (butyrate, acetate) and alcohols (ethanol). These bacteria ...

*** Genus '' Anaerocolumna'': '' Clostridium aminovalericum'', '' C. jejuense'' and '' C. xylanovorans'', reassigned in 2016. *** Genus '' Anaerotignum'': '' Clostridium lactatifermentans'', '' C. neopropionicum'' and '' C. propionicum'', reassigned in 2017 *** Genus ''

Blautia ''Blautia'' is a genus of anaerobic bacteria. Upon introduction, this genus mostly consisted of species previously described in the genus ''Ruminococcus''. References

Lachnospiraceae Taxa described in 2008 {{Clostridia-stub ...

'': '' Clostridium coccoides'', reassigned in 2008. *** Genus ''

Butyrivibrio ''Butyrivibrio'' is a genus of bacteria in Clostridia, Class Clostridia. Bacteria of this genus are common in the gastrointestinal systems of many animals. Genus ''Butyrivibrio'' was first described by Bryant and Small (1956) as Anaerobic organi ...

'': '' Clostridium proteoclasticum'', reassigned in 2008. *** Genus ''

Cellulosilyticum ''Cellulosilyticum'' is a mesophilic bacterial genus from the family of Lachnospiraceae The Lachnospiraceae are a family of obligately anaerobic, variably spore-forming bacteria in the order Eubacteriales that ferment diverse plant polysacch ...

'': '' C. lentocellum'', reassigned in 2010. *** Genus '' Enterocloster'': '' Clostridium aldenense'', '' C. asparagiforme'', '' C. bolteae'', '' C. citroniae'', '' C. clostridioforme'' and '' C. lavalense'', reassigned in 2020. *** Genus ''

Faecalicatena ''Faecalicatena'' is a bacterial genus from the family of Lachnospiraceae. References Further reading * Taxa described in 2017 Lachnospiraceae Bacteria genera {{Firmicutes-stub ...

'': '' Clostridium oroticum'', reassigned in 2017. *** Genus '' Lacrimispora'': '' Clostridium aerotolerans'', '' C. algidixylanolyticum'', '' C. amygdalinum'', '' C. celerecrescens'', '' C. indolis'', '' C. saccharolyticum'', '' C. sphenoides'', '' C. xylanolyticum'' *** Genus '' Mediterraneibacter'': '' Clostridium glycyrrhizinilyticum'', reassigned in 2019 ** Family

Oscillospiraceae Oscillospiraceae is a family of bacteria in the class Clostridia. All Oscillospiraceae are obligate anaerobes. However, members of the family have diverse shapes, with some rod-shaped and others cocci. Within the family, ''Faecalibacterium prau ...

*** Genus ''

Acetivibrio ''Acetivibrio'' is a genus of Clostridia The Clostridia are a highly polyphyletic class of Bacillota, including '' Clostridium'' and other similar genera. They are distinguished from the Bacilli by lacking aerobic respiration. They are obliga ...

'': '' Clostridium aldrichii'', '' C. alkalicellulosi'', '' C. clariflavum'', '' C. straminisolvens'' and '' C. thermocellum'', reassigned in 2019. *** Genus ''

Flavonifractor ''Flavonifractor plautii'' is a bacterium of the monotypic genus ''Flavonifractor'' in the family ''Oscillospiraceae Oscillospiraceae is a family of bacteria in the class Clostridia. All Oscillospiraceae are obligate anaerobes. However, member ...

'': '' Clostridium orbiscindens'', merged with ''Eubacterium plautii'' and moved to new genus in 2010. *** Genus '' Ruminiclostridium'': '' Clostridium cellobioparum'', '' Clostridium cellulolyticum'', '' Clostridium hungatei'', '' Clostridium josui'', '' Clostridium papyrosolvens'', '' Clostridium sufflavum'' and ' Clostridium termitidis'' reassigned in 2018. *** Genus '' Thermoclostridium'': '' Clostridium caenicola'' and '' C. stercorarium'', reassigned in 2018. ** Family

Peptostreptococcaceae The Peptostreptococcaceae are a family of Gram-positive bacteria in the class Clostridia. Several members of the Peptostreptococcaceae are well known inhabitants of the digestive tract. Microbiome studies of animal feces have corroborated this ...

*** Genus ''

Acetoanaerobium ''Acetoanaerobium'' is a genus in the family of Peptostreptococcaceae. Etymology The name ''Acetoanaerobium'' derives from the Latin noun ''acetum'', vinegar; Greek prefix ''an (ἄν)'', not; Greek noun ''aer, aeros (ἀήρ, ἀέρος)'', a ...

'': ''

Clostridium sticklandii ''Acetoanaerobium sticklandii'' is an anaerobic, motile, gram-positive bacterium. It was first isolated in 1954 from the black mud of the San Francisco Bay Area by T.C. Stadtman, who also named the species. ''A. sticklandii'' is not pathogenic i ...

'', reassigned in 2016. *** Genus ''

Clostridioides ''Clostridioides'' is a genus of Gram-positive bacteria, which includes ''Clostridioides difficile'', a human pathogen causing an infectious diarrhea. __TOC__ Taxonomy The genus ''Clostridioides'' was created to describe a few species formerly in ...

'': ''

Clostridium difficile ''Clostridioides difficile'' (syn. ''Clostridium difficile'') is a bacterium that is well known for causing serious diarrheal infections, and may also cause colon cancer. Also known as ''C. difficile'', or ''C. diff'' (), is Gram-positive spec ...

'' and '' C. mangenotii'', reassigned in 2016. *** Genus ''

Filifactor ''Filifactor'', is a genus of bacteria in the family Peptostreptococcaceae. References

Peptostreptococcaceae Bacteria genera Taxa described in 1994 {{clostridia-stub ...

'': '' Clostridium villosum'', reassigned in 1994. *** Genus '' Maledivibacter'': '' Clostridium halophilum'', reassigned in 2016. *** Genus ''

Paramaledivibacter ''Paramaledivibacter'' is a strictly anaerobic, slightly halophilic, non-spore-forming and moderately thermophilic genus of bacteria from the family of Peptostreptococcaceae The Peptostreptococcaceae are a family of Gram-positive bacteria in ...

'': '' Clostridium caminithermale'', reassigned in 2016. *** Genus ''

Peptacetobacter ''Peptacetobacter'' is a genus of bacteria in the family Peptostreptococcaceae The Peptostreptococcaceae are a family of Gram-positive bacteria in the class Clostridia. Several members of the Peptostreptococcaceae are well known inhabitants ...

'': '' Clostridium hiranonis'', reassigned in 2020. *** Genus ''

Peptoclostridium ''Peptoclostridium'' is a genus in family of Peptostreptococcaceae. Before assigned to the genus as currently defined, the name was previously proposed in 2013 as a novel genus hosting '' C. difficile'' as ''Peptoclostridium difficile'', before ...

'': '' C. litorale'', reassigned in 2016. ** Family

Syntrophomonadaceae The Syntrophomonadaceae are a family of anaerobic bacteria in the order of Clostridiales. As a source of energy, these organisms uses carboxylic acids. Phylogeny The currently accepted taxonomy is based on the List of Prokaryotic names with Stan ...

*** Genus ''

Syntrophospora ''Syntrophospora bryantii'' is a species of bacteria belonging to the family Syntrophomonadaceae. It is the only described species in the genus Syntrophospora and has been proposed to be a part of the genus ''Syntrophomonas ''Syntrophomonas' ...

'': '' Clostridium bryantii'', reassigned in 1990. * Order

Fusobacteriales Fusobacteriota are obligately anaerobic non-sporeforming Gram-negative bacilli. Since the first reports in the late nineteenth century, various names have been applied to these organisms, sometimes with the same name being applied to different s ...

** Family

Fusobacteriaceae ''Fusobacterium'' is a genus of anaerobic, Gram-negative, non-sporeforming bacteria belonging to Gracilicutes. Individual cells are slender, rod-shaped bacilli with pointed ends. Strains of ''Fusobacterium'' cause several human diseases, includin ...

*** Genus ''

Fusobacterium ''Fusobacterium'' is a genus of anaerobic, Gram-negative, non-sporeforming bacteria belonging to Gracilicutes. Individual cells are slender, rod-shaped bacilli with pointed ends. Strains of ''Fusobacterium'' cause several human diseases, includin ...

'': '' Clostridium rectum'', merged into ''Fusobacterium mortiferum'' in 2017. * Order

Halanaerobiales The Halanaerobiales are an order of bacteria placed within the class Clostridia, and encompassing two families, the Halanaerobiaceae and the Halobacteroidaceae. Originally placed within the highly polyphyletic class Clostridia, according to t ...

** Family Halobacteroidaceae *** Genus ''

Sporohalobacter ''Sporohalobacter'' are a genus of anaerobic bacteria Bacteria (; singular: bacterium) are ubiquitous, mostly free-living organisms often consisting of one biological cell. They constitute a large domain of prokaryotic microorganisms. ...

'': '' Clostridium lortetii'', reassigned in 1984. * Order

Selenomonadales The Selenomonadales are an order of bacteria within the class Negativicutes; unlike most other members of Bacillota, they are Gram-negative. The phylogeny of this order was initially determined by 16S rRNA comparisons. More recently, molecular ...

** Family Sporomusaceae *** Genus ''

Dendrosporobacter ''Dendrosporobacter'' is a genus in the phylum Bacillota (Bacteria). Members of the class Negativicutes, stain gram negative, despite being firmicutes Etymology The name ''Dendrosporobacter'' derives from:Greek noun ''dendron'', tree; Greek nou ...

'': '' Clostridium quercicolum'', reassigned in 2000. * Order

Thermoanaerobacterales The Thermoanaerobacterales is a polyphyletic order of bacteria placed within the polyphyletic class Clostridia, and encompassing four families: the Thermoanaerobacteraceae, the Thermodesulfobiaceae, the Thermoanaerobacterales Family III. Incer ...

** Family

Thermoanaerobacteraceae The Thermoanaerobacteraceae is a highly polyphyletic family of bacteria placed within the class clostridia. Originally placed within the highly polyphyletic class Clostridia and order Thermoanaerobacterales, according to the NCBI and LPSN, it is ...

*** Genus '' Moorella'': '' Clostridium thermaceticum'' and '' C. thermautotrophicum'', reassigned in 1994. *** Genus ''

Thermoanaerobacter ''Thermoanaerobacter'' is a genus in the phylum Bacillota (Bacteria). Members of this genus are thermophilic and anaerobic, several of them were previously described as ''Clostridium'' species and members of the now obsolete genera ''Acetogenium ...

'': '' Clostridium thermohydrosulfuricum'' and '' C. thermosulfurigenes'', reassigned in 1993 and '' Clostridium thermocopriae'' and '' C. thermosaccharolyticum'', reassigned in 1994. * Order Tissierellales ** Family Gottschalkiaceae *** Genus '' Gottschalkia'': '' Clostridium acidurici'' and '' C. purinilyticum'', first proposed in 2013 together with ''Clostridium angusta'', reassigned in 2017. ** Family Tissierellaceae *** Genus '' Schnuerera'': '' Clostridium ultunense'', reassigned in 2020. *** Genus '' Tissierella'': '' Clostridium hastiforme'', reassigned in 1986. ** Unassigned to family *** Genus '' Sedimentibacter'': '' C. hydroxybenzoicum'', reassigned in 2002.

References

{{Reflist * Lists of bacteria