Order Halanaerobiales

Family Halanaerobiaceae
Halanaerobium - Halocella - Haloincola - Halothermothrix

Family Halobacteroidaceae
Acetohalobium - Halanaerobacter - Halobacteroides - Halonatronum - Natroniella - Orenia - Selenihalanaerobacter - Sporohalobacter

Order Natranaerobiales

Family Natranaerobiaceae
Natranaerobius

Order "Thermoanaerobacteriales"

Family "Thermoanaerobacteriaceae"
Acetogenium - Ammonifex - Caldanaerobacter - Caldanaerobius - Carboxydibrachium - Coprothermobacter - Desulfovirgula - Gelria - Mahella - Moorella - Sporotomaculum - Tepidanaerobacter - Thermacetogenium - Thermanaeromonas - Thermoanaerobacter - Thermoanaerobacterium - Thermoanaerobium - Thermobacteroides - Thermosediminibacter - Thermovenabulum

Family Thermodesulfobiaceae
Thermodesulfobium

Unclassified Clostridia Desulfitibacter

Class "Erysipelotrichi"

Order "Erysipelotrichales"

Family Erysipelotrichaceae
Allobaculum - Bulleidia - Catenibacterium - Coprobacillus - Erysipelothrix - Holdemania - Solobacterium - Turicibacter

Class Mollicutes: see Phylum "Tenericutes"

Class Thermolithobacteria

Order Thermolithobacterales

Family Thermolithobacteraceae
Thermolithobacter

Phylum "Fusobacteria"

Class "Fusobacteria"

Order "Fusobacteriales"

Family "Fusobacteriaceae"
Cetobacterium - Fusobacterium - Ilyobacter - Propionigenium

Family "Leptotrichiaceae"

Leptotrichia - Sebaldella - Sneathia - Streptobacillus

Phylum "Gemmatimonadetes"

Class Gemmatimonadetes

Order Gemmatimonadales

Family Gemmatimonadaceae
Gemmatimonas

Phylum "Lentisphaerae"

Class "Lentisphaeria"

Order Lentisphaerales

Family "Lentisphaeraceae"
Lentisphaera

Order Victivallales

Family "Victivallaceae"
Victivallis

Phylum "Nitrospira" or "Nitrospirae"

Class "Nitrospira"

Order "Nitrospirales"

Family "Nitrospiraceae"
Leptospirillum - Nitrospira - Thermodesulfovibrio

Phylum "Planctomycetes" or "Planctobacteria"

Class "Planctomycetacia" or Planctomycea

Order Planctomycetales

Family Planctomycetaceae
Blastopirellula - Gemmata - Isosphaera - Pirellula - Planctomyces - Rhodopirellula - Schlesneria - Singulisphaera

Phylum "Proteobacteria"

Class Alphaproteobacteria