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Geobacillus

Genus of bacteria

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Source updated February 10, 2026

Geobacillus is a bacterial genus from the family Bacillaceae.

01Phylogeny

The currently accepted taxonomy is based on the List of Prokaryotic names with Standing in Nomenclature (LPSN) and National Center for Biotechnology Information (NCBI).

16S rRNA based LTP_10_2024

120 marker proteins based GTDB 09-RS220

Geobacillus

G. icigianus Bryanskaya et al. 2015

G. subterraneus Nazina et al. 2001

	G. subterraneus aromaticivorans Poli et al. 2013

	G. thermodenitrificans (Manachini et al. 2000) Nazina et al. 2001

G. vulcani (Caccamo et al. 2000) Nazina et al. 2004

G. lituanicus Kuisiene, Raugalas & Chitavichius 2004

	G. kaustophilus (Priest, Goodfellow & Todd 1989) Nazina et al. 2001

	G. thermoleovorans (Zarilla & Perry 1988) Nazina et al. 2001

	G. jurassicus Nazina et al. 2005

	G.uzenensis Nazina et al. 2001

G. proteinophilus Semenova et al. 2019

	G. stearothermophilus (Donk 1920) Nazina et al. 2001

	G. thermocatenulatus (Golovacheva et al. 1991) Nazina et al. 2001

Geobacillus

	G. subterraneus [incl. G.uzenensis]

	G. thermodenitrificans

G. stearothermophilus

	G. lituanicus

	Flavobacterium thermophilum Loginova & Egorova 1982 non Yoshida & Oshima 1971

G. icigianus

G. jurassicus

G. vulcani

G. proteinophilus

G. thermocatenulatus

	"G. zalihae" Abd Rahman et al. 2007

	G. thermoleovorans [incl. G. kaustophilus]

Unassigned species:

"G. anatolicus" Uysal et al. 2001 ex Caglayan & Bilgin 2011
"G. bogazici" Turker et al. 2003
"G. kaue" Uysal et al. 2001 ex Caglayan & Bilgin 2011
"G. mahadia" Mohtar et al. 2016
"G. thermopakistaniensis" Siddiqui et al. 2014
"G. thermoparaffinivorans" Wang et al. 2005
"G. tropicalis" Burgos-Figueroa et al. 2006
"G. uralicus" Popova et al. 2002

Watch videos about GeobacillusExplainers and documentaries on YouTube (opens in a new tab)

Sources and credits

This article is adapted from the Wikipedia article “Geobacillus”, written by its contributors and licensed under CC BY-SA 4.0. Fathomly has changed the layout, removed citation markers, navigation and maintenance notices, and adjusted punctuation. This adapted version is shared under the same license. For references, see the original article.

Images, from Wikimedia Commons:

Geobacillus stearothermophilus NRRL B-1172 (Type Strain).jpg by Agricultural Research Service (NRRL)Culture Collection, Public domain

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