thermoanaerobacter ethanolicus thermoanaerobacter ethanolicus thermoanaerobacter ethanolicus is a species of thermophilic, anaerobic, non-spore-forming bacteria. thermoanaerobacter ethanolicus scientific classification domain: bacteria phylum: bacillota class: clostridia order: thermoanaerobacterales family: thermoanaerobacteraceae genus: thermoanaerobacter species: t. ethanolicus binomial name thermoanaerobacter ethanolicuswiegel and ljungdahl 1982 emend. lee et al. 2007 the bacteria were first isolated from hot springs in yellowstone national park. the bacteria ferment sugars into ethanol and carbon dioxide more than other anaerobes, hence the species name ethanolicus. the growth range of t. ethanolicus is 37-77°c and ph 4.4-9.9, with the optimum growth temperature at around 70°c.