Order Xanthomonadales

Family Sinobacteraceae
Hydrocarboniphaga - Nevskia - Sinobacter

Family Xanthomonadaceae
Alkanibacter - Aquimonas - Arenimonas - Aspromonas - Dokdonella - Dyella - Frateuria - Fulvimonas - Ignatzschineria - Luteibacter - Luteimonas - Lysobacter - Pseudoxanthomonas - Rhodanobacter - Silanimonas - Singularimonas - Stenotrophomonas - Thermomonas - Wohlfahrtiimonas - Xanthomonas - Xylella

Unclassified Gammaproteobacteria Alkalimonas - Methylohalomonas - Methylonatrum - Sedimenticola - Simiduia - Solimonas - Spongiibacter - Steroidobacter - Thiohalomonas - Thiohalophilus

Phylum "Spirochaetes" or "Spirochaetae"

Class Spirochaetes

Order Spirochaetales

Family "Brachyspiraceae"
Brachyspira - Serpulina

Family "Brevinemataceae"
Brevinema

Family Leptospiraceae
Leptonema - Leptospira - Turneriella

Family Spirochaetaceae
Borrelia - Clevelandina - Cristispira - Diplocalyx - Hollandina - Pillotina - Spirochaeta - Treponema

Unclassified Spirochaetales Exilispira

Phylum "Synergistetes"

Aminiphilus - Aminobacterium - Aminomonas - Anaerobaculum - Cloacibacillus - Dethiosulfovibrio - Jonquetella - Synergistes - Thermanaerovibrio - Thermovirga

Phylum "Tenericutes"

Class Mollicutes (In the next edition of the Bergey's Manual of Systematic Bacteriology, the class Mollicutes will be excluded from the phylum "Firmicutes" and classified in the phylum "Tenericutes" - Reference: K.H. Schleifer and W. Ludwig, personal communication)

Order Acholeplasmatales

Family Acholeplasmataceae
Acholeplasma

Order Anaeroplasmatales

Family Anaeroplasmataceae
Anaeroplasma - Asteroleplasma

Order Entomoplasmatales

Family Entomoplasmataceae
Entomoplasma - Mesoplasma

Family Spiroplasmataceae
Spiroplasma

Order Mycoplasmatales

Family Mycoplasmataceae
Eperythrozoon - Haemobartonella - Mycoplasma - Ureaplasma

Phylum "Thermodesulfobacteria"

Class Thermodesulfobacteria

Order Thermodesulfobacteriales

Family Thermodesulfobacteriaceae
Thermodesulfatator - Thermodesulfobacterium

Phylum "Thermomicrobia"

Class Thermomicrobia

Order Thermomicrobiales

Family Thermomicrobiaceae
Thermomicrobium

Phylum "Thermotogae"

Class Thermotogae

Order Thermotogales

Family Thermotogaceae
Fervidobacterium - Geotoga - Marinitoga - Petrotoga - Thermosipho - Thermotoga

Phylum "Verrucomicrobia"