prokaryotes - bacteria see Domain Bacteria Woese et al. 1990 stat. inval. Domain "Bacteria" Woese et al. 1990 stat. inval. see Domain Bacteria Woese et al. 2024 Phylum "Firmicutes" (Gibbons and Murray 1978) Garrity and Holt 2001 stat. inval. see Phylum Bacillota Gibbons and Murray 2021 Class Clostridia Rainey 2010 Order Thermoanaerobacterales Wiegel 2010 01 Family Thermoanaerobacteraceae Wiegel 2010 02 Family Thermodesulfobiaceae Mori et al. 2004 03 Genus Caldanaerovirga Wagner et al. 2009, incertae sedis 04 Genus Caldicellulosiruptor Rainey et al. 1995, incertae sedis 05 Genus Mahella Bonilla Salinas et al. 2004, incertae sedis 06 Genus Syntrophaceticus Westerholm et al. 2011, incertae sedis 07 Genus Thermoanaerobacterium Lee et al. 1993, incertae sedis 08 Genus Thermosediminibacter Lee et al. 2006, incertae sedis 09 Genus Thermovenabulum Zavarzina et al. 2002, incertae sedis 10 Genus Thermovorax Mäkinen et al. 2012, incertae sedis