Order Coriobacteriales

Suborder "Coriobacterineae"

Family Coriobacteriaceae
Adlercreutzia - Asaccharobacter - Atopobium - Collinsella - Coriobacterium - Cryptobacterium - Denitrobacterium - Eggerthella - Olsenella - Slackia

Subclass Rubrobacteridae

Order Rubrobacterales

Suborder "Rubrobacterineae"

Family Conexibacteraceae
Conexibacter

Family Patulibacteraceae
Patulibacter

Family Rubrobacteraceae
Rubrobacter

Family Solirubrobacteraceae
Solirubrobacter

Family Thermoleophilaceae
Thermoleophilum

Subclass Sphaerobacteridae

Order Sphaerobacterales

Suborder "Sphaerobacterineae"

Family Sphaerobacteraceae
Sphaerobacter

Phylum "Aquificae"

Class Aquificae

Order Aquificales

Family Aquificaceae
Aquifex - Calderobacterium - Hydrogenivirga - Hydrogenobacter - Hydrogenobaculum - Thermocrinis

Family Desulfurobacteriaceae
Balnearium - Desulfurobacterium - Thermovibrio

Family Hydrogenothermaceae
Hydrogenothermus - Persephonella - Sulfurihydrogenibium - Venenivibrio

Unclassified Aquificales
Thermosulfidibacter

Phylum "Bacteroidetes"

Class "Bacteroidia"

Order "Bacteroidales"

Family Bacteroidaceae
Acetofilamentum - Acetomicrobium - Acetothermus - Anaerorhabdus - Bacteroides

Family "Marinilabiaceae"
Alkaliflexus - Anaerophaga - Marinilabilia

Family "Porphyromonadaceae"
Barnesiella - Capsularis - Dysgonomonas - Odoribacter - Oribaculum - Paludibacter - Parabacteroides - Petrimonas - Porphyromonas - Proteiniphilum - Tannerella

Family "Prevotellaceae"
Hallella - Prevotella - Xylanibacter

Family "Rikenellaceae"
Alistipes - Rikenella