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Scientific classification
Kingdom: Bacteria
Phylum: Firmicutes
Class: Clostridia Rainey 2010
Order: Thermoanaerobacterales
Wiegel 2010
Family: Thermoanaerobacteraceae
Wiegel 2010

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 now thought to be a basal clade of the phylum Firmicutes.


The currently accepted taxonomy is based on the List of Prokaryotic names with Standing in Nomenclature (LPSN) [1] and National Center for Biotechnology Information (NCBI)[2] and the phylogeny is based on 16S rRNA-based LTP release 111 by The All-Species Living Tree Project [3]


A. degensii Huber and Stetter 1996 (type sp.)

A. thiophilus Miroshnichenko et al. 2008


?C. hydrothermalisKozina et al. 2007

?C. proteolyticusKozina et al. 2007

C. uzonensis Kozina et al. 2010

 C. subterraneus

?C. s. subterraneus (Fardeau et al. 2000) Fardeau et al. 2004 (type sp.)

C. subterraneus yonseiensis (Kim et al. 2001) Fardeau et al. 2004

C. s. pacificus (Sokolova et al. 2001) Fardeau et al. 2004

C. s. tengcongensis (Xue et al. 2001) Fardeau et al. 2004


?T. inferiiOrlygsson & Beck 2007

?T. keratinophilusRiessen & Antranikian 2001

?T. indiensisBhattacharya et al. 2011

T. uzonensis Wagner et al. 2008

T. sulfurigignens Lee et al. 2007

T. thermocopriae (Jin et al. 1988) Collins et al. 1994

T. italicus Kozianowski et al. 1998

 T. mathranii

T. m. alimentarius Carlier et al. 2007

T. m. mathranii (Larsen et al. 1998) Carlier et al. 2007

T. pseudethanolicus Onyenwoke et al. 2007

T. brockii lactiethylicus Cayol et al. 1995

 T. brockii

T. b. brockii (Zeikus et al. 1983) Cayol et al. 1995

T. b. finnii (Schmid et al. 1986) Cayol et al. 1995

T. kivui (Leigh and Wolfe 1983) Collins et al. 1994

T. siderophilus Slobodkin et al. 1999

T. sulfurophilus Bonch-Osmolovskaya 1998

T. wiegelii Cook et al. 1996

T. pseudethanolicus Onyenwoke et al. 2007

T. thermohydrosulfuricus (Klaushofer and Parkkinen 1965) Lee et al. 1993

T. acetoethylicus (Ben-Bassat and Zeikus 1983) Rainey and Stackebrandt 1993

T. ethanolicus Wiegel and Ljungdahl 1982 (type sp.)