Methanopyria corrig.

Abstract

Me.tha.no.py'ria. N.L. masc. n. Methanopyrus type genus of the type order; suff. ‐ia ending to denote a class; N.L. neut. pl. n. Methanopyria the Methanopyrales class. Euryarchaeota / Methanopyria corrig. The class currently consists of one order Methanopyrales , one family Methanopyraceae , one genus Methanopyrus , and one species Methanopyrus kandleri . Cells are rods and nonsporulating. Cell division by septum formation. Cell wall consists of an inner pseudomurein and an outer proteinaceous S‐layer. Gram‐stain‐positive. Strictly anaerobic. Growth is chemolithoautotrophic with H 2 /CO 2 converted to CH 4 as energy‐forming reaction. Growth optimum near pH 6.5. Hyperthermophilic. No growth occurs below 84°C. Optimum growth temperature, 98–100°C. Occur in deep‐sea hydrothermal fields.