procaryotes Domain Archaea Woese et al. 1990 Phylum Euryarchaeota Garrity and Holt 2001 Class Halobacteria Grant et al. 2001 see Class Halobacteria Grant et al. 2002 Order Halobacteriales Grant and Larsen 1989 Family Halobacteriaceae Gibbons 1974 (Approved Lists 1980) Genus Haloarcula Torreblanca et al. 1986