[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020] Domain "Archaea" Woese et al. 1990 Phylum "Crenarchaeota" Garrity and Holt 2001 Class Thermoprotei Reysenbach 2002 Order Desulfurococcales Huber and Stetter 2002 Family Pyrodictiaceae Burggraf et al. 1997 Genus Pyrodictium Stetter et al. 1984 Pyrodictium occultum Stetter et al. 1984