procaryotes Count: - Domain Archaea Woese et al. 1990 Count: [g] 2p;8c;12o;20f;68g Phylum Crenarchaeota Garrity and Holt 2001 Count: [g] 1c;3o;5f;22g Class Thermoprotei Reysenbach 2001 nom. inval. see Class Thermoprotei Reysenbach 2002 Count: [g] 3o;5f;22g Order Thermoproteales Zillig and Stetter 1982 Count: [g] 2f;5g Family Thermoproteaceae Zillig and Stetter 1982 Count: [g] 4g 1 Genus Thermoproteus Zillig and Stetter 1982 Count: - 2 Genus Caldivirga Itoh et al. 1999 Count: - 3 Genus Pyrobaculum Huber et al. 1988 Count: - 4 Genus Thermocladium Itoh et al. 1998 Count: -