hydrogenothermaceae hydrogenothermaceae the hydrogenothermaceae family are bacteria that live in harsh environmental settings. they have been found in hot springs, sulfur pools, and thermal ocean vents. they are true bacteria as opposed to the other inhabitants of extreme environments, the archaea. an example occurrence of certain extremophiles in this family are organisms of the genus sulfurihydrogenibium that are capable of surviving in extremely hot environments such as hverigerdi, iceland. hydrogenothermaceae scientific classification domain: bacteria phylum: aquificota class: aquificae order: aquificales family: hydrogenothermaceaeeder & huber 2003 genera hydrogenothermus persephonella sulfurihydrogenibium venenivibrio obtaining energy hydrogenothermaceae families consist of aerobic or microaerophilic bacteria, which generally obtain energy by oxidation of hydrogen or reduced sulfur compounds by molecular oxygen. phylogeny the currently accepted taxonomy is based on the list of prokaryotic names with standing in nomenclature (lspn) and the national center for biotechnology information (ncbi). 16s rrna based ltp_01_2022 120 marker proteins based gtdb 07-rs207 persephonella p. marina götz et al. 2002 p. guaymasensis götz et al. 2002 p. hydrogeniphila nakagawa et al. 2003 hydrogenothermus marinus stöhr et al. 2001 venenivibrio stagnispumantis hetzer et al. 2008 sulfurihydrogenibium s. yellowstonense nakagawa et al. 2005 s. kristjanssonii flores et al. 2008 s. subterraneum takai et al. 2003 s. azorense aguiar et al. 2004 s. rodmanii o'neill et al. 2008 sulfurihydrogenibium s. yellowstonense s. subterraneum s. azorense hydrogenothermus marinus persephonella p. marina p. atlantica" francois et al. 2020 p. hydrogeniphila