fontimonas fontimonas fontimonas is a gram-negative genus of bacteria from the family of sinobacteraceae with one known species (fontimonas thermophila). fontimonas thermophila has been isolated from a hot spring from the hot springs national park in the united states. fontimonas scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: nevskiales family: nevskiaceae genus: fontimonaslosey et al. 2013 type species fontimonas thermophila species f. thermophila