haloferax gibbonsii haloferax gibbonsii haloferax gibbonsii is a species of archaea in the family haloferacaceae. haloferax gibbonsii scientific classification domain: archaea kingdom: euryarchaeota class: halobacteria order: haloferacales family: haloferacaceae genus: haloferax species: h. gibbonsii binomial name haloferax gibbonsii(rodriguez-valera et al. 1986)