Genome Sequences of Five Type Strain Members of the Archaeal Family , Acidianus ambivalens, Acidianus infernus, Stygiolobus azoricus, Sulfuracidifex metallicus, and Sulfurisphaera ohwakuensis.

Presented are five genomes from the polyextremophilic (optimal temperature of >65°C and optimal pH of <3.5) archaeal family , greatly expanding order-wide genomic diversity. Included are the only obligate anaerobic species, several facultative sulfur utilizers, two metal mobilizers, one facultative chemolithoautotroph with robust metabolic versatility, and some of the most thermophilic thermoacidophiles reported to date.