[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020] Domain Bacteria Woese et al. 1990 Phylum "Thermotogae" Reysenbach 2001 Class Thermotogae Reysenbach 2002 Order Thermotogales Reysenbach 2002 Family Thermotogaceae Reysenbach 2002 Genus Fervidobacterium Patel et al. 1985 Fervidobacterium islandicum Huber et al. 1991