Natura - nature actualia - actual entities Mundus Plinius - physical world naturalia - natural bodies [crown] Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020] Clade neomura Cavalier-Smith, 1987 Domain Archaea Woese et al. 1990 [paraphyletic] Superphylum TACK Guy and Ettema 2011 Phylum Crenarchaeota Garrity and Holt 2001 Class Thermoprotei Reysenbach 2002 Order Thermoprotealesᵀ Zillig and Stetter 1982 Family Thermoproteaceaeᵀ Zillig and Stetter 1982 Genus Thermoproteusᵀ Zillig and Stetter 1982 Thermoproteus uzoniensis Bonch-Osmolovskaya et al. 2001