Thermotoga elfii
Thermotoga hypogea
Thermotoga lettingae
Thermotoga maritima
Thermotoga naphthophila
Thermotoga neapolitana
Thermotoga petrophila
Thermotoga subterranea
Thermotoga thermarum

Thermotoga are thermophile or hyperthermophile bacteria whose cell is wrapped in an outer "toga" membrane. They metabolize carbohydrates. Species have varying amounts of salt and oxygen tolerance.

T. subterranea strain SL1 was found in a 70°C deep continental oil reservoir in the East Paris Basin , France. It is anaerobic and reduces cystine and thiosulfate to hydrogen sulfide.