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