From: Updated clusters of orthologous genes for Archaea: a complex ancestor of the Archaea and the byways of horizontal gene transfer
No. of gains
Clade
565
Halobacteriales
296
Thermococcales
247
Thermoplasmatales
245
Sulfolobales
204
Thaumarchaeota
199
deep Euryarchaeota
166
Archaeoglobales
123
TACK superphilum
104
Methanobrevibacter ruminantium
98
Methanosarcina