methanopyraceae methanopyraceae methanopyraceae are a family of the methanopyrales. this family contains only one genus, which contains only one species, methanopyrus kandleri. it is chemolitoautotrophic and its cells are bar-shaped. it can grow comfortably at a temperature of 98 °c and can survive at temperatures as high as 110 °c, making it the most thermophilic known methanogen. it has been found to live in hydrothermal vents. methanopyraceae scientific classification domain: archaea kingdom: euryarchaeota class: methanopyri order: methanopyrales family: methanopyraceae binomial name methanopyraceaehuber and stetter 2002 genus methanopyrus