halogranum halogranum halogranum (common abbreviation hgn.) is a genus of halophilic archaea in the family of haloferacaceae. halogranum scientific classification domain: archaea kingdom: euryarchaeota class: halobacteria order: haloferacales family: haloferacaceae genus: halogranumcui et al. 2010 species h. amylolyticum h. gelatinilyticum h. rubrum h. salarium