[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 Sulfolobales Stetter 1989 Family Sulfolobaceae Stetter 1989 Genus Acidianus Segerer et al. 1986 Acidianus infernus Segerer et al. 1986