haloferax elongans haloferax elongans haloferax elongans is a species of archaea in the family haloferacaceae. haloferax elongans scientific classification domain: archaea kingdom: euryarchaeota class: halobacteria order: haloferacales family: haloferacaceae genus: haloferax species: h. elongans binomial name haloferax elongans(allen et al. 2008)