# Bacillales

The Bacillales 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.

## Phylogeny

The currently accepted taxonomy based on the List of Prokaryotic names with Standing in Nomenclature (LPSN) and the National Center for Biotechnology Information (NCBI).
| 16S rRNA based LTP_10_2024 | 120 marker proteins based GTDB 09-RS220 |
| "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. Bacillaceae~3 Bacillaceae~4 Bacillaceae~5 Sporolactobacillaceae Bacillaceae~6 Heyndrickxiaceae Bacillaceae~7 Jeotgalibacillaceae Bacillaceae~8 Bacillaceae~9 Caryophanaceae Bacillaceae~11 Listeriaceae Exiguobacteriales Exiguobacteriaceae Staphylococcales Staphylococcaceae [incl. Abyssicoccaceae, Salinicoccaceae] Gemellaceae other Lactobacillales | "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" Mechercharimyces {JANTPT01} Thermoactinomycetaceae 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 Caryophanales Caryophanaceae Staphylococcales Gemellaceae Abyssicoccaceae Salinicoccaceae Staphylococcaceae other Lactobacillales Listeriaceae other |