Bacillales, from Latin "bacillus", meaning "little staff, wand", are an order of Gram-positive bacteria, placed within the Bacillota.[1]  The Bacillales are the most productive order of the phylum Firmicutes.[2] Representative genera include Bacillus, Listeria and Staphylococcus.[3] 
 Phylogeny
 The currently accepted taxonomy based on the List of Prokaryotic names with Standing in Nomenclature (LPSN)[1] and the National Center for Biotechnology Information (NCBI).[4] 
    | 16S rRNA based LTP_10_2024[5][6][7]  |  120 marker proteins based GTDB 09-RS220[8][9][10]  | 
        | "Bacillia" s.s.  |        |   |     |    |   |    |   |        |   |     |    |   |    |   |        |   |        |   |    Novibacillaceae    |    |   |    |   |        |   |        | Caldalkalibacillales  |    Caldalkalibacillaceae    |    |   |      |    |   |    |   |        | "Caldibacillales"  |    Caldibacillaceae    |    |   |    | Calditerricolales  |    Calditerricolaceae    |    |   |      |    |   |      |    |   |      |    |   |    |   |        |   |        |   |        |   |    Microaerobacter    |    |   |    |   |        | Desulfuribacillales  |    Desulfuribacillaceae    |    |   |    | Tepidibacillales  |    Tepidibacillaceae    |    |   |      |    |   |      |    |   |    |   |        |   |    Oxalophagaceae [incl. "Ammoniphilaceae"]    |    |   |    |   |        | Aneurinibacillales  |    Aneurinibacillaeae    |    |   |    | Brevibacillales  |    Brevibacillaceae    |    |   |      |    |   |      |    |   |      |    |   |    |   |        |   |    "Bacillus thermozeamaize"    |    |   |    |   |     |    |   |      |    |   |      |    |   |      |    |   |      |    |   |      |    |   |      |        | "Bacillia" s.s.  |        |   |     |    |   |    |   |        |   |        |   |     |    |   |    |   |        | Tumebacillales  |        |   |        |   |    Collibacillus {BOQE01}    |    |   |    |   |    Effusibacillaceae    |    |   |      |    |   |    |   |    Tumebacillaceae    |    |   |      |    |   |    | Alicyclobacillales  |     |    |   |      |    |   |      |    |   |    |   |        |   |        | Desulfuribacillales  |    Desulfuribacillaceae    |    |   |      |    |   |    |   |        |   |        |   |        | Calditerricolales  |    Calditerricolaceae    |    |   |      |    |   |    |   |        |   |        | Bacillales_F  |    "Bacillus thermozeamaize" {Bacillaceae_M}    |    |   |      |    |   |    |   |        | Thermicanales  |    Thermicanaceae    |    |   |    | "Brockiales"  |    "Brockiaceae"    |    |   |      |    |   |      |    |   |      |    |   |    |   |        |   |        | Thermoactinomycetales  |        |   |    Novibacillaceae    |    |   |    |   |        |   |        |   |        |   |    "Polycladomycesaceae"    |    |   |    |   |    "Planifilaceae"    |    |   |      |    |   |    |   |    "Desmosporaceae"    |    |   |      |    |   |    |   |     |    |   |      |    |   |      |    |   |      |    |   |    |   |        |   |        | Paenibacillales  |        |   |    "Reconcilibacillaceae"    |    |   |    |   |        |   |        |   |    "Xylanibacillaceae"    |    |   |    |   |        |   |    Insulibacter {DA-C8}    |    |   |    |   |    "Longirhabdaceae"    |    |   |      |    |   |      |    |   |    |   |     |    |   |      |    |   |      |    |   |      |    |   |    |   |        |   |        |   |     |    |   |    |   |        | Aneurinibacillales  |        |   |    "Ammoniphilaceae"    |    |   |    |   |    Aneurinibacillaceae    |    |   |      |    |   |    | Brevibacillales  |    Brevibacillaceae    |    |   |      |    |   |      |    |   |    |   |        |   |        | Tepidibacillales  |    Tepidibacillaceae    |    |   |      |    |   |    |   |        |   |        | "Rubeoparvulales"  |    "Rubeoparvulaceae"    |    |   |      |    |   |    |   |        |   |     |    |   |    |   |        |   |        | Exiguobacteriales  |    Exiguobacteriaceae    |    |   |      |    |   |    |   |        |   |        | "Harrysmithimonadales"  |    "Harrysmithimonadaceae"    |    |   |      |    |   |    |   |        |   |        | "Bacillidae"  |        |   |        | "Caldibacillales"  |        |   |        |   |    Bacillus_CG & BF {JC228}    |    |   |    |   |    Caldibacillaceae    |    |   |      |    |   |    |   |        |   |        |   |    Heyndrickxiaceae    |    |   |    |   |        |   |        |   |    Bacillus smithii {DSM-4216}    |    |   |    |   |        |   |    Oikeobacillus {DSM-23947}    |    |   |    |   |    Domibacillaceae    |    |   |      |    |   |      |    |   |    |   |        |   |    Falsibacillaceae    |    |   |    |   |        |   |        |   |    Mangrovibacillus {R1DC41}    |    |   |    |   |     |    |   |      |    |   |    |   |    Rossellomoreaceae    |    |   |      |    |   |      |    |   |      |    |   |      |    |   |    |   |     |    |   |      |    |   |      |    | Bacillales_B  |      |    |   |    |   |        |   |        | Bacillales s.s.  |        |   |     |    |   |    |   |        |   |    Priestia {Bacillaceae_H}    |    |   |    |   |        |   |        |   |    Bacillaceae_L    |    |   |    |   |    Anoxybacillaceae    |    |   |      |    |   |    |   |        |   |    Sutcliffiellaceae    |    |   |    |   |        |   |        |   |    Bacillus carboniphilus {JAIVKR01}    |    |   |    |   |    Aeribacillaceae    |    |   |      |    |   |    |   |    Bacillaceae    |    |   |      |    |   |      |    |   |      |    |   |      |    |   |      |    |   |      |    |   |    |   |        |   |        | Bacillales_C  |        |   |    Bacillus solimangrovi {Bacillaceae_N}    |    |   |    |   |    Schinkiaceae    |    |   |      |    |   |      |    |   |    |   |        |   |        |   |        |   |        | Bacillales_E  |        |   |    Lottiidibacillaceae    |    |   |    |   |    "Massilibacteriaceae"    |    |   |      |    |   |      |    |   |    |   |        | Bacillales_K  |    Sporolactobacillaceae    |    |   |    | Bacillales_G  |        |   |        |   |    "Maribacillaceae"    |    |   |    |   |    Pseudalkalibacillus species-group 2 {HB172195}    |    |   |      |    |   |    |   |    Fictibacillaceae    |    |   |      |    |   |      |    |   |      |    |   |    |   |        | Bacillales_H  |        |   |        |   |    Marinococcaceae    |    |   |    |   |    Salisediminibacteriaceae    |    |   |      |    |   |    |   |        |   |    Anaerobacillaceae    |    |   |    |   |        |   |    "Desertibacillaceae"    |    |   |    |   |        |   |    Alkalihalobacterium {Bacillaceae_F}    |    |   |    |   |    Bacillaceae_D    |    |   |      |    |   |      |    |   |      |    |   |      |    |   |      |    |   |      |    |   |    |   |        |   |        |   |        | Bacillales_I  |    Bacillus marinisedimentorum {Bacillaceae_O}    |    |   |    | DSM‑28697  |    Aureibacillaceae    |    |   |      |    |   |    |   |     |    |   |      |    |   |      |    |   |      |    |   |      |    |   |      |    |   |      |    |   |      |    |   |    |   |     |    |   |      |    |   |      |    |   |      |    |   |      |    |   |      |    |   |      |    |   |      |    |   |      |    |   |      |    |   |      |    |   |      |    |   |      |    |   |      |    |   |      | 
 See also
  References
   - ^ a b J.P. Euzéby. "Bacillales". List of Prokaryotic names with Standing in Nomenclature (LPSN). Retrieved 2018-07-20. 
  - ^ Harirchi, Sharareh; Sar, Taner; Ramezani, Mohaddaseh; Aliyu, Habibu; Etemadifar, Zahra; Nojoumi, Seyed Ali; Yazdian, Fatemeh; Awasthi, Mukesh Kumar; Taherzadeh, Mohammad J. (December 2022). "Bacillales: From Taxonomy to Biotechnological and Industrial Perspectives". Microorganisms. 10 (12): 2355. doi:10.3390/microorganisms10122355. ISSN 2076-2607. PMC 9781867. PMID 36557608. 
  - ^ George M. Garrity; Vos, P.; Garrity, G.; Jones, D.; Krieg, N.R.; Ludwig, W.; Rainey, F.A.; Schleifer, K.-H.; Whitman, W.B. (September 15, 2009). The Firmicutes. Bergey's Manual of Systematic Bacteriology. Vol. 3 (2nd ed.). New York: Springer. p. 1450. ISBN 978-0-387-95041-9. British Library no. GBA561951. 
  - ^ Sayers; et al. "Bacillales". National Center for Biotechnology Information (NCBI) taxonomy database. Retrieved 2018-07-20. 
  - ^ "The LTP". Retrieved 10 December 2024. 
  - ^ "LTP_all tree in newick format". Retrieved 10 December 2024. 
  - ^ "LTP_10_2024 Release Notes" (PDF). Retrieved 10 December 2024. 
  - ^ "GTDB release 09-RS220". Genome Taxonomy Database. Retrieved 10 May 2024. 
  - ^ "bac120_r220.sp_labels". Genome Taxonomy Database. Retrieved 10 May 2024. 
  - ^ "Taxon History". Genome Taxonomy Database. Retrieved 10 May 2024. 
  
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 - Domain
  - Archaea
  - Bacteria
  - Eukaryota
  - (major groups
  - Metamonada
  - Discoba
  - Diaphoretickes 
- Hacrobia 
- Cryptista
 
   - Rhizaria
  - Alveolata
  - Stramenopiles
  - Plants
 
   - Amorphea 
- Amoebozoa
  - Opisthokonta 
- Animals
  - Fungi
  - Mesomycetozoea)
 
  
      | 
Candidate Phyla  Radiation |  | 
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 |  |  | "Synergistetes" |  | 
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 | "Thermocalda" |  | 
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  | 
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  |  |  | "Cyanoprokaryota" |  - Cyanobacteriota 
  - "Margulisiibacteriota" 
- "Marinamargulisbacteria"
  - "Riflemargulisbacteria"
  - "Saganbacteria"
  - "Termititenacia"
 
      | 
|---|
 | "Firmicutes" |  - Bacillota 
  - Bacillota A 
- "Clostridiia"
  - "Thermoanaerobacteria"
  - Thermosediminibacteria
 
   - Bacillota D 
  - Bacillota E 
- Sulfobacillia
  - Symbiobacteriia
  - Thermaerobacteria
 
   - Bacillota G 
- "Hydrogenisporia"
  - Limnochordia
 
   - "Desulfotomaculota" 
- "Carboxydocellia"
  - "Carboxydothermia"
  - "Dehalobacteriia"
  - Desulfitobacteriia
  - Desulfotomaculia
  - "Moorellia"
  - Peptococcia
  - Syntrophomonadia
  - Thermincolia
 
   - "Halanaerobiaeota" 
  - "Selenobacteria" 
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  | 
| Incertae sedis |  - "Qinglongiota" 
  - "Salinosulfoleibacteria"
  - "Teskebacteria"
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  Taxon identifiers  | 
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| Bacillales |  | 
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  Authority control databases   | 
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| National |  | 
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| Other |  | 
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