procaryotes Domain Bacteria Woese et al. 1990 Phylum Thermotogae Reysenbach 2001 Class Thermotogae Reysenbach 2001 see Class Thermotogae Reysenbach 2002 Order Thermotogales Reysenbach 2001 see Order Thermotogales Reysenbach 2002 Family Thermotogaceae Reysenbach 2001 see Family Thermotogaceae Reysenbach 2002 Genus Thermotoga Stetter and Huber 1986