Hydrogenophilalia

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.