Article · Wikipedia archive · Last revised Jun 11, 2026

Bacillales

Bacillales, from Latin "bacillus", meaning "little staff, wand", are an order of Gram-positive bacteria, placed within the Bacillota. The Bacillales are the most productive order of the phylum "Firmicutes". Representative genera include Bacillus, Listeria and Staphylococcus.

Last revised
Jun 11, 2026
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≈ 2 min
Length
492 w
Citations
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Source
Bacillales
Scientific classification Edit this classification
Domain: Bacteria
Kingdom: Bacillati
Phylum: Bacillota
Class: Bacilli
Order: Bacillales
Prévot 1953
Type genus
Bacillus
Families

See text

Synonyms
  • "Plectridiales" Prevot 1938

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_2024567 120 marker proteins based GTDB 09-RS2208910
"Bacillia" s.s.

Hydrogenibacillus

Thermicanales

Thermicanaceae

Alicyclobacillales

Alicyclobacillaceae [incl. Effusibacillaceae, Kyrpidiaceae, Sulfoacidibacillaceae, Tumebacillaceae]

Paenibacillales

Paenibacillaceae

Thermoactinomycetales

Thermoactinomycetaceae

Novibacillaceae

Caldalkalibacillales

Caldalkalibacillaceae

"Caldibacillales"

Caldibacillaceae

Calditerricolales

Calditerricolaceae

Microaerobacter

Desulfuribacillales

Desulfuribacillaceae

Tepidibacillales

Tepidibacillaceae

Oxalophagaceae [incl. "Ammoniphilaceae"]

Aneurinibacillales

Aneurinibacillaeae

Brevibacillales

Brevibacillaceae

"Bacillus thermozeamaize"

Bacillales s.s.

Listeriaceae

Exiguobacteriales

Exiguobacteriaceae

Staphylococcales

Staphylococcaceae [incl.
Abyssicoccaceae, Salinicoccaceae]

"Bacillia" s.s.
"Pasteuriales"

Pasteuriaceae

Kyrpidiales

Kyrpidiaceae

Tumebacillales

Collibacillus {BOQE01}

Effusibacillaceae

Tumebacillaceae

Alicyclobacillales

Sulfoacidibacillaceae

Alicyclobacillaceae

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"

Paenibacillus_AK & AE {YIM-B00363}

"Gorillibacteriaceae"

Paenibacillus swuensis {DY6}

Paenibacillaceae

DSM‑22679

Microaerobacter {DSM-22679}

Aneurinibacillales

"Ammoniphilaceae"

Aneurinibacillaceae

Brevibacillales

Brevibacillaceae

Tepidibacillales

Tepidibacillaceae

"Rubeoparvulales"

"Rubeoparvulaceae"

Caldalkalibacillales

Caldalkalibacillus_A {JCM-10596}

Caldalkalibacillaceae

Exiguobacteriales

Exiguobacteriaceae

"Harrysmithimonadales"

"Harrysmithimonadaceae"

"Bacillidae"
"Caldibacillales"

Bacillus_CG & BF {JC228}

Caldibacillaceae

Heyndrickxiaceae

Bacillus smithii {DSM-4216}

Oikeobacillus {DSM-23947}

Domibacillaceae

Falsibacillaceae

Mangrovibacillus {R1DC41}

Bacillus coahuilensis {Bacillaceae_K}

Jeotgalibacillaceae

Rossellomoreaceae

Pradoshiaceae

Peribacillus {DSM-1321}

Cytobacillaceae

Bacillales_B
Bacillales s.s.

Bacillus_BS {SA4}

Bacillaceae_G

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

Bacillales_D

Alkalibacillaceae

Pontibacillus {BH030062}

Halobacillaceae

Amphibacillaceae

Staphylococcales

Gemellaceae

Abyssicoccaceae

Salinicoccaceae

Staphylococcaceae

other

See also

See also

References

References

  1. J.P. Euzéby. "Bacillales". List of Prokaryotic names with Standing in Nomenclature (LPSN). Retrieved 2018-07-20.
  2. 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.
  3. 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.
  4. Sayers; et al. "Bacillales". National Center for Biotechnology Information (NCBI) taxonomy database. Retrieved 2018-07-20.
  5. "The LTP". Retrieved 10 December 2024.
  6. "LTP_all tree in newick format". Retrieved 10 December 2024.
  7. "LTP_10_2024 Release Notes" (PDF). Retrieved 10 December 2024.
  8. "GTDB release 09-RS220". Genome Taxonomy Database. Retrieved 10 May 2024.
  9. "bac120_r220.sp_labels". Genome Taxonomy Database. Retrieved 10 May 2024.
  10. "Taxon History". Genome Taxonomy Database. Retrieved 10 May 2024.