Pyrolobus fumarii, gen. and sp. nov., represents a novel group of archaea, extending the upper temperature limit for life to 113 degrees C.

@article{Blchl1997PyrolobusFG,
  title={Pyrolobus fumarii, gen. and sp. nov., represents a novel group of archaea, extending the upper temperature limit for life to 113 degrees C.},
  author={Elisabeth Bl{\"o}chl and Reinhard Rachel and Siegfried Burggraf and Doris Hafenbradl and Holger Windekilde Jannasch and K. O. Stetter},
  journal={Extremophiles : life under extreme conditions},
  year={1997},
  volume={1 1},
  pages={14-21}
}
A novel, irregular, coccoid-shaped archaeum was isolated from a hydrothermally heated black smoker wall at the TAG site at the Mid Atlantic Ridge (depth 3650 meters). It grew at between 90 degrees C and 113 degrees C (optimum 106 degrees C) and pH 4.0-6.5 (optimum 5.5) and 1%-4% salt (optimum 1.7%). The organism was a facultatively aerobic obligate chemolithoautotroph gaining energy by H2-oxidation. Nitrate, S2O3(2-), and low concentrations of O2 (up to 0.3% v/v) served as electron acceptors… CONTINUE READING