"[Prokaryota]" see Domain Prokaryota
   03 Family Aquificaceae Reysenbach 2002
   04 Phylum Aquificae Reysenbach 2002 stat. inval. see Phylum Aquificota Reysenbach 2021
   05 Class Aquificae Reysenbach 2002
   06 Order Aquificales Reysenbach 2002
   07 Family Archaeoglobaceae Huber and Stetter 2002
   08 Order Archaeoglobales Huber and Stetter 2002
   09 Class Archaeoglobi Garrity and Holt 2002
   12 Phylum Chloroflexi Garrity and Holt 2002 stat. inval. see Phylum Chloroflexota Garrity and Holt 2021
   13 Family Chrysiogenaceae Garrity and Holt 2002
   14 Order Chrysiogenales Garrity and Holt 2002
   15 Phylum Chrysiogenetes Garrity and Holt 2002 stat. inval. see Phylum Chrysiogenota Garrity and Holt 2021
   16 Class Chrysiogenetes Garrity and Holt 2002
   18 Phylum Crenarchaeota Garrity and Holt 2002 stat. inval. see Phylum Thermoproteota Garrity and Holt 2021
   19 Family Deferribacteraceae Huber and Stetter 2002
   20 Order Deferribacterales Huber and Stetter 2002
   21 Phylum Deferribacteres Garrity and Holt 2002 stat. inval. see Phylum Deferribacterota Garrity and Holt 2021
   22 Class Deferribacteres Huber and Stetter 2002
   23 Class Deinococci Garrity and Holt 2002
   24 Order Desulfurococcales Huber and Stetter 2002
   25 Phylum Euryarchaeota Garrity and Holt 2002 stat. inval. see Kingdom Methanobacteriati (Garrity and Holt 2023) Oren and Göker 2024
   27 Class Halobacteria Grant et al. 2002
   31 Class Methanobacteria Boone 2002
   38 Class Methanococci Boone 2002
   40 Family Methanopyraceae Huber and Stetter 2002
   41 Order Methanopyrales Huber and Stetter 2002
   42 Class Methanopyri Garrity and Holt 2002
   43 Family Methanosaetaceae Boone et al. 2002 nom. illeg. see Family Methanotrichaceae Akinyemi et al. 2021
   48 Order Methanosarcinales Boone et al. 2002
   64 Family Thermaceae da Costa and Rainey 2002
   65 Order Thermales Rainey and da Costa 2002
   66 Class Thermococci Zillig and Reysenbach 2002
   67 Phylum Thermodesulfobacteria Garrity and Holt 2002 stat. inval. see Phylum Thermodesulfobacteriota Garrity and Holt 2021
   68 Class Thermodesulfobacteria Hatchikian et al. 2002
   69 Family Thermodesulfobacteriaceae Hatchikian et al. 2002
   70 Order Thermodesulfobacteriales Hatchikian et al. 2002
   71 Phylum Thermomicrobia Garrity and Holt 2002 stat. inval. see Phylum Thermomicrobiota Garrity and Holt 2021
   72 Class Thermomicrobia Garrity and Holt 2002
   73 Family Thermomicrobiaceae Garrity and Holt 2002
   74 Order Thermomicrobiales Garrity and Holt 2002
   75 Class Thermoplasmata Reysenbach 2002
   76 Family Thermoplasmataceae Reysenbach 2002
   77 Order Thermoplasmatales Reysenbach 2002
   78 Class Thermoprotei Reysenbach 2002
   79 Family Thermotogaceae Reysenbach 2002
   80 Phylum Thermotogae Reysenbach 2002 stat. inval. see Phylum Thermotogota Reysenbach 2021
   81 Class Thermotogae Reysenbach 2002
   82 Order Thermotogales Reysenbach 2002