[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 Petrotoga Davey et al. 1993
               1 Petrotoga miotherma Davey et al. 1993
               2 Petrotoga mexicana Miranda-Tello et al. 2004
               3 Petrotoga mobilis Lien et al. 1998
               4 Petrotoga olearia L'Haridon et al. 2002
               5 Petrotoga sibirica L'Haridon et al. 2002