haloferax sulfurifontis haloferax sulfurifontis haloferax sulfurifontis is a species of archaea in the family haloferacaceae. haloferax sulfurifontis scientific classification domain: archaea kingdom: euryarchaeota class: halobacteria order: haloferacales family: haloferacaceae genus: haloferax species: h. sulfurifontis binomial name haloferax sulfurifontis(elshahed et al. 2004)