How many phyla are there within the Archaea?

You are going to get a different answer depending on who you ask. The big ones I would say are Crenarchaeota, Euryarchaeota, Korarchaeota, Lokiarchaeota, Nanoarchaeota and Thaumarchaeota. read more

Salt-tolerant archaea (the Haloarchaea) use sunlight as an energy source, and other species of archaea fix carbon; however, unlike plants and cyanobacteria, no known species of archaea does both. Archaea reproduce asexually by binary fission, fragmentation, or budding; unlike bacteria and eukaryotes, no known species forms spores. read more