The Hydrogenophilaceae are a family of the class Hydrogenophilalia in the phylum Pseudomonadota ("Proteobacteria"), with two genera – Hydrogenophilus and Tepidiphilus. Like all Pseudomonadota, they are Gram-negative. All known species are thermophilic, growing around 50 °C, and use molecular hydrogen or organic molecules as their source of electrons to support growth; some species are autotrophs.
Thermasporomyces composti is a Gram-positive and thermophilic bacterium from the genus Thermasporomyces which has been isolated from compost on Japan.
Rubellimicrobium thermophilum is a strictly aerobic and moderately thermophilic bacterium from the genus of Rubellimicrobium.
Thermophagus is a moderately thermophilic and strictly anaerobic genus of bacteria from the family of Marinilabiliaceae with one known species. Thermophagus xiamenensis has been isolated from sediments from a hot spring from Xiamen in China.
Acetomicrobium hydrogeniformans is an anaerobic and moderately thermophilic bacterium from the genus of Acetomicrobium which has been isolated from oil production water from North Slope Borough in the United States.
Thermovirga is a Gram-negative, anaerobic and motile genus of bacteria from the family of Synergistaceae with one known species. Thermovirga lienii has been isolated from production water from an oil well from the North Sea in Norway.
Thermanaerovibrio is a Gram-negative, non-spore-forming chemoorganotrophic and thermophilic genus of bacteria from the family of Synergistaceae.
Phenylobacterium lituiforme is a moderately thermophilic, facultative anaerobic and motile bacterium from the genus of Phenylobacterium which has been isolated from the Great Artesian Basin from Queensland in Australia.
Thermoflavifilum is a strictly aerobic, moderately acidophilic and non-spore-forming genus of bacteria from the family of Chitinophagaceae with one known species. Thermoflavifilum aggregans has been isolated from soil from the Waikite Valley Thermal Pools in New Zealand.
Inmirania is a thermophilic and facultatively autotrophic genus of bacteria from the family of Ectothiorhodospiraceae with one known species. Inmirania thermothiophila has been isolated from water and sediments from a thermal spring from the Kuril Islands.
Ureibacillus composti is a Gram-positive, rod-shaped and thermophilic bacterium from the genus of Ureibacillus which has been isolated from livestock-manure compost from Ichon in South Korea.
Ureibacillus defluvii is a Gram-positive, thermophilic, rod-shaped and non-motile bacterium from the genus of Ureibacillus.
Brassicibacter thermophilus is a Gram-negative, thermophilic, obligately anaerobic, non-spore-forming and non-motile bacterium from the genus of Brassicibacter.
Anaerosolibacter is a Gram-negative, strictly anaerobic, rod-shaped, mesophilic and motile bacterial genus from the family of Clostridiaceae with one known species.
Fervidicella is a Gram-negative, thermophilic and strictly anaerobic bacterial genus from the family of Clostridiaceae with one known species. Fervidicella metallireducens has been isolated from microbial mats from the Great Artesian Basin.
Paramaledivibacter is a strictly anaerobic, slightly halophilic, non-spore-forming and moderately thermophilic genus of bacteria from the family of Peptostreptococcaceae with one known species.
Thermobrachium is an obligate anaerobic, moderately alkaliphilic, thermophilic and proteolytic genus of bacteria from the family of Clostridiaceae with one known species.
Thermohalobacter is a Gram-negative, thermophilic, strictly halophilic, non-spore-forming anaerobic, rod-shaped and motile genus of bacteria from the family of Clostridiaceae with one known species. Thermohalobacter berrensis has been isolated from a solar saltern.
Thermotalea is a strictly anaerobic and thermophilic genus of bacteria from the family of Clostridiaceae with one known species. Thermotalea metallivorans has been isolated from microbial mats from the Great Artesian Basin.
Orenia sivashensis is an anaerobe and thermophilic bacterium from the genus of Orenia which has been isolated from the hypersaline lagoon of the Lake Sivash in Crimea.
