Archaea are small single-celled microorganisms (microbes) that form one of the three domains of cellular life, along with bacteria and eukaryotes. They do not possess a nucleus and therefore belong to ...
Diversity and taxonomy of methanogens / David R. Boone, William B. Whitman, and Pierre Rouvière -- Microscopy / G. Dennis Sprott and Terry J. Beveridge -- Physiological ecology of methanogens / ...