# Bacillaceae

The Bacillaceae are a family of gram-positive, heterotrophic, rod-shaped bacteria that may produce endospores. Motile members of this family are characterized by peritrichous flagella. Some Bacillaceae are aerobic, while others are facultative or strict anaerobes. Most are not pathogenic, but Bacillus species are known to cause disease in humans.

## Gram-variable cell wall

Some Bacillaceae, such as the genera Filobacillus, Lentibacillus, and Halobacillus, stain Gram-negative or Gram-variable, but are known to have a Gram-positive cell wall.

## Nomenclature

Taxa within this family are sometimes colloquially identified as "bacilli". However, this term is ambiguous because it does not distinguish between class Bacilli, order Bacillales, family Bacillaceae, and genus Bacillus.

## Genera

The polyphyletic family Bacillaceae comprises the following:
| LPSN & NCBI | 16S rRNA based LTP_01_2022 & 120 marker proteins based GTDB 07-RS207 |
| Aeribacillus Miñana-Galbiset al. 2010 Aidingibacillus Wang et al. 2018 Aliibacillus Xu et al. 2019 Alkalibacillus Jeon et al. 2005 Alkalicoccus Zhao et al. 2017 Alkalihalobacillus Patel and Gupta 2020 Alkalilactibacillus Schmidt et al. 2016 Allobacillus Sheu et al. 2011 Alteribacillus Didari et al. 2012 Alteribacter Gupta et al. 2020 Amphibacillus Niimura et al. 1990 "Amylobacillus" Atanassova et al. 2005 Anaerobacillus Zavarzina et al. 2010 Anoxybacillus Pikuta et al. 2000 Aquibacillus Amoozegar et al. 2014 Aquisalibacillus Márquez et al. 2008 Aureibacillus Liu et al. 2015 Bacillus Cohn 1872 Calculibacillus Min et al. 2016 Caldalkalibacillus Xue et al. 2006 Caldaterra Oshima and Moriya 2008 Caldibacillus Coorevits et al. 2012 Calditerricola Moriya et al. 2011 Calidifontibacillus Adiguzel et al. 2020 Camelliibacillus Lin et al. 2018 Cerasibacillus Nakamura et al. 2004 Compostibacillus Yu et al. 2015 Cytobacillus Patel and Gupta 2020 Desertibacillus Bhatt et al. 2017 Domibacillus Seiler et al. 2013 Ectobacillus Gupta et al. 2020 Edaphobacillus Lal et al. 2013 Evansella Gupta et al. 2020 Exiguobacterium Collins et al. 1984 Falsibacillus Zhou et al. 2009 Ferdinandcohnia Gupta et al. 2020 Fermentibacillus Hirota et al. 2016 Fictibacillus Glaeser et al. 2013 Filobacillus Schlesner et al. 2001 Geobacillus Nazina et al. 2001 Geomicrobium Echigo et al. 2010 Gottfriedia Gupta et al. 2020 Gracilibacillus Wainø et al. 1999 Halalkalibacillus Echigo et al. 2007 Halobacillus Spring et al. 1996 Halolactibacillus Ishikawa et al. 2005 Heyndrickxia Gupta et al. 2020 Hydrogenibacillus Kämpfer et al. 2013 Jilinibacillus Liu et al. 2015 Lederbergia Gupta et al. 2020 Lentibacillus Yoon et al. 2002 Litchfieldia Gupta et al. 2020 Lottiidibacillus Liu et al. 2019 Lysinibacillus Ahmed et al. 2007 Margalitia Gupta et al. 2020 Maribacillus Liu et al. 2019 Marinococcus Hao et al. 1985 Massilibacterium Tidjani Alou et al. 2016 Melghiribacillus Addou et al. 2015 Mesobacillus Patel and Gupta 2020 Metabacillus Patel and Gupta 2020 Microaerobacter Khelifi et al. 2011 Natribacillus Echigo et al. 2012 Natronobacillus Sorokin et al. 2009 Neobacillus Patel and Gupta 2020 Niallia Gupta et al. 2020 Oceanobacillus Lu et al. 2002 Ornithinibacillus Mayr et al. 2006 Parageobacillus Aliyu et al. 2019 Paraliobacillus Ishikawa et al. 2003 Paralkalibacillus Hirota et al. 2017 Paucisalibacillus Nunes et al. 2006 Pelagirhabdus Sultanpuram et al. 2016 Peribacillus Patel and Gupta 2020 Piscibacillus Tanasupawat et al. 2007 Polygonibacillus Hirota et al. 2016 Pontibacillus Lim et al. 2005 Pradoshia Saha et al. 2019 Priestia Gupta et al. 2020 "Pseudobacillus" Verma et al. 2019 Pseudogracilibacillus Glaeser et al. 2014 Pseudoneobacillus Kämpfer et al. 2022 Psychrobacillus Krishnamurthi et al. 2011 Pueribacillus Wang et al. 2018 "Quasibacillus" Verma et al. 2017 Radiobacillus Li et al. 2020 Robertmurraya Gupta et al. 2020 Rossellomorea Gupta et al. 2020 "Rubeoparvulum" Tidjani Alou et al. 2017 Saccharococcus Nystrand 1984 Salibacterium Reddy et al. 2015 ''Salicibibacter'' Jang et al. 2018 Salimicrobium Yoon et al. 2007 Salinibacillus Ren and Zhou 2005 Salipaludibacillus Sultanpuram and Mothe 2016 Salirhabdus Albuquerque et al. 2007 Salisediminibacterium Jiang et al. 2012 Saliterribacillus Amoozegar et al. 2013 Salsuginibacillus Carrasco et al. 2007 Schinkia Gupta et al. 2020 Sediminibacillus Carrasco et al. 2008 Siminovitchia Gupta et al. 2020 Sinibacillus Yang and Zhou 2014 Sinobaca Li et al. 2008 Streptohalobacillus Wang et al. 2011 Sutcliffiella Gupta et al. 2020 Swionibacillus Li et al. 2017 Tenuibacillus Ren and Zhou 2005 Tepidibacillus Slobodkina et al. 2014 Terribacillus An et al. 2007 Terrilactibacillus Prasirtsak et al. 2016 Texcoconibacillus Ruiz-Romero et al. 2013 Thalassobacillus García et al. 2005 Thalassorhabdus Sultanpuram and Mothe 2018 "Thermalkalibacillus" Zhao et al. 2006 Thermolongibacillus Cihan et al. 2014 Virgibacillus Heyndrickx et al. 1998 Viridibacillus Albert et al. 2007 Vulcanibacillus L'Haridon et al. 2006 Weizmannia Gupta et al. 2020 | "Calditerricolales" "Calditerricolaceae" Calditerricola "Thermicanales" "Thermicanaceae" "Haemobacillus" Thermicanus DSM-22653 DSM-22653 Brockia "Ca. Carbonibacillus" Hydrogenibacillus "Tepidibacillales" "Tepidibacillaceae" Tepidibacillus Vulcanibacillus "Aneurinibacillales" "Aneurinibacillaceae" Oxalophagus Aneurinibacillus RAOX-1 Ammoniphilus "Brevibacillales" "Brevibacillaceae" Brevibacillus "Caldalkalibacillales" "Caldalkalibacillaceae" Caldalkalibacillus "Rubeoparvulales" "Rubeoparvulaceae" "Rubeoparvulum" "Exiguobacterales" "Exiguobacteraceae" Exiguobacterium CAJFEE01 CAJFEE01 "Ca. Harrysmithimonas" DSM-16016 "Caldibacillaceae" Caldibacillus Swionibacillus Bacillales Bacillaceae_I Sutcliffiella Bacillaceae_G Ectobacillus Gottfriedia Bacillaceae_H Priestia Bacillaceae Bacillus Metabacillus Bacillaceae_L Ferdinandcohnia Litchfieldia "Aeribacillaceae" Aeribacillus "Anoxybacillaceae" Anoxybacillus Geobacillus Parageobacillus Saccharococcus Thermolongibacillus Bacillales C Bacillaceae_J Calidifontibacillus Bacillales B Bacillaceae_C Heyndrickxia Lederbergia Margalitia Siminovitchia Weizmannia "Domibacillaceae" Domibacillus "Pseudobacillus" "Quasibacillus" DSM-25281 Falsibacillus "Jeotgalibacillaceae" Jeotgalibacillus Bacillaceae_B Rossellomorea DSM-1321 Peribacillus Pradoshia DSM-18226 Cytobacillus Mesobacillus Neobacillus Niallia Robertmurraya Bacillales D DSM-28697 Aureibacillus "Alkalibacillaceae" Alkalibacillus Allobacillus Aquisalibacillus Filobacillus Halalkalibacillus Melghiribacillus Piscibacillus Salinibacillus Salirhabdus Tenuibacillus "Halobacillaceae" Halobacillus Pontibacillus Salimicrobium Thalassobacillus "Amphibacillaceae" Alkalilactibacillus Amphibacillus Aquibacillus "Ca. Avamphibacillus" Cerasibacillus Gracilibacillus Halolactibacillus Lentibacillus Oceanobacillus Ornithinibacillus Paraliobacillus Pelagirhabdus Pseudogracilibacillus Radiobacillus Saliterribacillus Sediminibacillus Sinibacillus Streptohalobacillus Terribacillus Virgibacillus Bacillales E SA5d-4 Lottiidibacillus "Massilibacteriaceae" "Massilibacterium" Bacillales G UBA6769 "Maribacillus" Pueribacillus HB172195 Pseudalkalibacillus "Fictibacillaceae" Fictibacillus Bacillales H Bacillaceae_F Alkalihalobacterium KJ1-10-99 Desertibacillus "Anaerobacillaceae" Anaerobacillus Bacillaceae_D Alkalihalobacillus Alkalihalophilus Fermentibacillus Halalkalibacter Halalkalibacterium Paralkalibacillus Polygonibacillus Shouchella "Salisediminibacteriaceae" Alkalicoccus Alteribacter Evansella Salipaludibacillus Salisediminibacterium Texcoconibacillus "Marinococcaceae" Aidingibacillus Aliibacillus Alteribacillus Geomicrobium Marinococcus Natribacillus Salibacterium Salicibibacter Salsuginibacillus Sinobaca Thalassorhabdus |