halohasta halohasta halohasta (common abbreviation hht.) is a genus of halophilic archaea in the family of halorubraceae. halohasta scientific classification domain: archaea kingdom: euryarchaeota class: halobacteria order: haloferacales family: halorubraceae genus: halohastamou et al. 2013 species h. litchfieldiae h. litorea