ferrithrix thermotolerans ferrithrix thermotolerans ferrithrix thermotolerans is a bacterium from the genus ferrithrix which has been isolated from mineral samples from the yellowstone national park in the united states. ferrithrix thermotolerans scientific classification domain: bacteria phylum: actinomycetota class: acidimicrobiia order: acidimicrobiales family: acidimicrobiaceae genus: ferrithrixjohnson et al. 2009 species: f. thermotolerans binomial name ferrithrix thermotoleransjohnson et al. 2009 type strain atcc baa-1645dsm 19514y005