Suborder Micromonosporineae

Family Micromonosporaceae
Actinocatenispora - Actinoplanes - Amorphosporangium - Ampullariella - Asanoa - Catellatospora - Catelliglobosispora - Catenuloplanes - Couchioplanes - Dactylosporangium - Hamadaea - Krasilnikovia - Longispora - Luedemannella - Micromonospora - Pilimelia - Planopolyspora - Planosporangium - Polymorphospora - Pseudosporangium - Salinispora - Spirilliplanes - Verrucosispora - Virgisporangium

Suborder Propionibacterineae

Family Nocardioidaceae
Actinopolymorpha - Aeromicrobium - Friedmanniella - Hongia - Kribbella - Marmoricola - Micropruina - Nocardioides - Pimelobacter - Propionicicella - Propionicimonas

Family Propionibacteriaceae
Aestuariimicrobium - Arachnia - Brooklawnia - Granulicoccus - Jiangella - Luteococcus - Microlunatus - Propionibacterium - Propioniferax - Propionimicrobium - Tessaracoccus

Suborder Pseudonocardineae

Family Actinosynnemataceae
Actinokineospora - Actinosynnema - Lechevalieria - Lentzea - Saccharothrix - Umezawaea

Family Pseudonocardiaceae
Actinoalloteichus - Actinobispora - Actinomycetospora - Actinopolyspora - Allokutzneria - Amycolata - Amycolatopsis - Crossiella - Faenia - Goodfellowiella - Kibdelosporangium - Kutzneria - Prauserella - Pseudoamycolata - Pseudonocardia - Saccharomonospora - Saccharopolyspora - Streptoalloteichus - Thermobispora - Thermocrispum

Suborder Streptomycineae

Family Streptomycetaceae
Actinopycnidium - Actinosporangium - Chainia - Elytrosporangium - Kitasatoa - Kitasatospora - Microellobosporia - Streptacidiphilus - Streptomyces - Streptoverticillium

Suborder Streptosporangineae

Family Nocardiopsaceae
Haloactinospora - Nocardiopsis - Streptomonospora - Thermobifida

Family Streptosporangiaceae
Acrocarpospora - Herbidospora - Microbispora - Microtetraspora - Nonomuraea - Planobispora - Planomonospora - Planotetraspora - Sphaerisporangium - Streptosporangium - Thermopolyspora

Family Thermomonosporaceae
Actinocorallia - Actinomadura - Excellospora - Spirillospora - Thermomonospora

Order Bifidobacteriales

Family Bifidobacteriaceae
Aeriscardovia - Alloscardovia - Bifidobacterium - Gardnerella - Metascardovia - Parascardovia - Scardovia

Unclassified Bifidobacteriales
Turicella

Subclass Coriobacteridae