halobaculum halobaculum halobaculum (common abbreviation: hbl.) is a genus of the halorubraceae. halobaculum scientific classification domain: archaea kingdom: euryarchaeota phylum: euryarchaeota class: halobacteria order: haloferacales family: halorubraceae genus: halobaculumoren et al. 1995 species h. gomorrense h. gomorrense h. magnesiiphilum h. roseum h. rubrum h. salinum h. saliterrae