Table S4. Taxonomy of archaeal organisms used in analyses of FSFs	

Abbrevation	Organism
Aful	Archaeoglobus fulgidus DSM 4304 
Aper	Aeropyrum pernix 
Halsp	Halobacterium sp. NRC-1 
Mace	Methanosarcina acetivorans C2A 
Mjan	Methanocaldococcus jannaschii 
Mkan	Methanopyrus kandleri AV19 
Mmar	Methanococcus maripaludis 
Mmaz	Methanosarcina mazei Goe1 
Mthe	Methanothermobacter thermautotrophicus Delta H 
Nequ	Nanoarchaeum equitans Kin4-M 
Paby	Pyrococcus abyssi 
Pfur	Pyrococcus furiosus DSM 3638 
Phor	Pyrococcus horikoshii 
Ptor	Picrophilus torridus DSM 9790 
PYaer	Pyrobaculum aerophilum IM2 
Ssol	Sulfolobus solfataricus 
Stok	Sulfolobus tokodaii 
Taci	Thermoplasma acidophilum 
Tvol	Thermoplasma volcanium