Procaryotic Genera Domain "Archaea" Woese et al. 1990 Phylum Euryarchaeota Garrity and Holt 2001 Class Halobacteria Grant et al. 2001 [monotypic] see Class Halobacteria Grant et al. 2002 Order Halobacterialesᵀ Grant and Larsen 1989 [monotypic] Family Halobacteriaceae Gibbons 1974 (Approved Lists 1980) Genus Halogeometricum Montalvo-Rodríguez et al. 1998