Korarchaeota

…one minor ancient lineage, the Korarchaeota. Other subdivisions have been proposed, including Nanoarchaeota and Thaumarchaeota.

Organisms in the Korarchaeota lineage and the proposed Nanoarchaeota lineage also inhabit high-temperature environments; however, the nanoarchaea are highly unusual because they grow and divide on the surface of another archaea, Ignicoccus. Nanoarchaea, which were discovered in 2002, contain both the smallest known living cell (1/100th the size…