Spear expected to find species of archaebacteria, the oldest living organisms on Earth, because they're known to thrive in such extreme conditions. (sciencemag.org)
These components are the mitochondria (derived from purple bacteria), the plastids (from cyanobacteria), and the nucleocytoplasmic component (from archaebacteria). (scientificamerican.com)
Of the 150 eubacteria species found, nearly a third had not previously been catalogued, likewise for two - thirds of the 90 archaebacteria species in the samples. (sciencemag.org)