Euryarchaeota (from Ancient Greekεὐρύς eurús, "broad, wide") is a kingdom of archaea.[3] Euryarchaeota are highly diverse and include methanogens, which produce methane and are often found in intestines; halobacteria, which survive extreme concentrations of salt; and some extremely thermophilic aerobes and anaerobes, which generally live at temperatures between 41 and 122 °C. They are separated from the other archaeans based mainly on rRNA sequences and their unique DNA polymerase.[4]
^Hogan CM (2010). E. Monosson, C. Cleveland (eds.). "Archaea". Encyclopedia of Earth. National Council for Science and the Environment. Retrieved 18 August 2017.