Bacteria  >  Pseudomonadati  >  Aquificota  >  Aquificia  >  Aquificales

Genus	Species
Aquifex	26
Hydrogenivirga	9
Hydrogenobacter	24
Hydrogenobaculum	14
Hydrogenothermus	4
Persephonella	125
Sulfurihydrogenibium	15
Thermocrinis	10
Venenivibrio	3