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] Domain Bacteria Woese et al. 1990 [paraphyletic?] Phylum Thermotogae Reysenbach 2001 [monotypic] [Class "Thermotogae"ᵀ Reysenbach 2001] see Class Thermotogae Reysenbach 2002 [Order "Thermotogales"ᵀ Reysenbach 2001] see Order Thermotogales Reysenbach 2002 1 [Family "Thermotogaceae"ᵀ Reysenbach 2001] see Family Thermotogaceae Reysenbach 2002