halalkalicoccus halalkalicoccus halalkalicoccus (common abbreviation hac.) is a genus of the halobacteriaceae. halalkalicoccus scientific classification domain: archaea kingdom: euryarchaeota phylum: euryarchaeota class: halobacteria order: halobacteriales family: halobacteriaceae genus: halalkalicoccusxue et al. 2005 species h. jeotgali h. paucihalophilus h. subterraneus h. tibetensis