目前接受的分类法基于原核生物标准命名列表(LPSN)[1] 和美国国家生物技术信息中心(NCBI) 。[4]
| 基于16S rRNA LTP_10_2024[5][6][7] | 基于120种标记蛋白质 GTDB 09-RS220[8][9][10] | 
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| "Bacillia" s.s. | 
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|  | Novibacillaceae
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| Caldalkalibacillales | Caldalkalibacillaceae
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| "Caldibacillales" | Caldibacillaceae
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| Calditerricolales | Calditerricolaceae
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|  | Microaerobacter
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| Desulfuribacillales | Desulfuribacillaceae
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| Tepidibacillales | Tepidibacillaceae
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|  | Oxalophagaceae [incl. "Ammoniphilaceae"]
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| Aneurinibacillales | Aneurinibacillaeae
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| Brevibacillales | Brevibacillaceae
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|  | "Bacillus thermozeamaize"
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| "Bacillia" s.s. | 
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| "Pasteuriales" | Pasteuriaceae
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| Tumebacillales | 
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|  | Collibacillus {BOQE01}
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|  | Effusibacillaceae
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|  | Tumebacillaceae
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| Alicyclobacillales |  |  
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| Desulfuribacillales | Desulfuribacillaceae
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| Calditerricolales | Calditerricolaceae
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| Bacillales_F | "Bacillus thermozeamaize" {Bacillaceae_M}
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| Thermicanales | Thermicanaceae
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| "Brockiales" | "Brockiaceae"
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| Thermoactinomycetales | 
|  | Novibacillaceae
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|  | "Polycladomycesaceae"
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|  | "Planifilaceae"
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|  | "Desmosporaceae"
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| Paenibacillales | 
|  | "Reconcilibacillaceae"
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|  | "Xylanibacillaceae"
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|  | Insulibacter {DA-C8}
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|  | "Longirhabdaceae"
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| DSM‑22679 | Microaerobacter {DSM-22679}
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| Aneurinibacillales | 
|  | "Ammoniphilaceae"
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|  | Aneurinibacillaceae
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| Brevibacillales | Brevibacillaceae
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| Tepidibacillales | Tepidibacillaceae
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| "Rubeoparvulales" | "Rubeoparvulaceae"
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| Exiguobacteriales | Exiguobacteriaceae
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| "Harrysmithimonadales" | "Harrysmithimonadaceae"
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| "Bacillidae" | 
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| "Caldibacillales" | 
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|  | Bacillus_CG & BF {JC228}
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|  | Caldibacillaceae
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|  | Heyndrickxiaceae
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|  | Bacillus smithii {DSM-4216}
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|  | Oikeobacillus {DSM-23947}
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|  | Domibacillaceae
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|  | Falsibacillaceae
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|  | Mangrovibacillus {R1DC41}
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|  | Bacillus coahuilensis {Bacillaceae_K}
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|  | Jeotgalibacillaceae
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|  | Rossellomoreaceae
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| Bacillales_B |  |  
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| Bacillales s.s. | 
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|  | Priestia {Bacillaceae_H}
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|  | Bacillaceae_L
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|  | Anoxybacillaceae
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|  | Sutcliffiellaceae
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|  | Bacillus carboniphilus {JAIVKR01}
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|  | Aeribacillaceae
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|  | Bacillaceae
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| Bacillales_C | 
|  | Bacillus solimangrovi {Bacillaceae_N}
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|  | Schinkiaceae
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| Bacillales_E | 
|  | Lottiidibacillaceae
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|  | "Massilibacteriaceae"
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| Bacillales_K | Sporolactobacillaceae
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| Bacillales_G | 
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|  | "Maribacillaceae"
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|  | Pseudalkalibacillus species-group 2 {HB172195}
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|  | Fictibacillaceae
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| Bacillales_H | 
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|  | Marinococcaceae
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|  | Salisediminibacteriaceae
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|  | Anaerobacillaceae
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|  | "Desertibacillaceae"
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|  | Alkalihalobacterium {Bacillaceae_F}
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|  | Bacillaceae_D
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| Bacillales_I | Bacillus marinisedimentorum {Bacillaceae_O}
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| DSM‑28697 | Aureibacillaceae
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