See text Thermoanaerobacter is a genus in the phylum Bacillota (Bacteria).

[1] 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 and Thermobacteroides[2][3] The name Thermoanaerobacter derives from:Greek adjective thermos (θερμός), hot; Greek prefix an (ἄν), not; Greek noun aer, aeros (ἀήρ, ἀέρος), air; Neo-Latin masculine gender noun, bacter, nominally meaning "a rod", but in effect meaning a bacterium, rod; Neo-Latin masculine gender noun Thermoanaerobacter, rod which grows in the absence of air at elevated temperatures.

[4] The genus contains 15 species, namely[4] Three former members of this genus, T. subterraneus, T. tengcongensis and T. yonseiensis, were reclassified as subspecies of Caldanaerobacter subterraneus[19] The currently accepted taxonomy is based on the List of Prokaryotic names with Standing in Nomenclature (LPSN)[20] and National Center for Biotechnology Information (NCBI)[21] T. thermocopriae T. mathranii alimentarius Carlier, Bonne & Bedora-Faure 2007 T. mathranii mathranii Larsen, Nielsen & Ahring 1998 T. italicus T. pentosaceus T. sulfurigignens T. uzonensis T. kivui T. brockii lactiethylicus Cayol et al. 1995 T. pseudethanolicus T. b. brockii (Zeikus et al. 1983) Lee et al. 1993 T. b. finnii (Schmid et al. 1986) Cayol et al. 1995 T. siderophilus T. wiegelii T. sulfurophilus T. acetoethylicus T. ethanolicus T. thermohydrosulfuricus T. kivui T. uzonensis T. pseudethanolicus (incl.

T. brockii) T. thermocopriae (incl.

T. italicus & T. mathranii) T. wiegelii T. ethanolicus (incl.