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| Methanogens Methanobacteria Common name of organisms requiring completely anaerobic conditions for growth and producing methane gas as a catabolic product. Methanogens are found in the bovine stomach, swamp mud, and other environments in which oxygen is not present. There are four taxonomic orders: METHANOBACTERIALES; METHANOCOCCALES; METHANOMICROBIALES; and METHANOSARCINALES. | |
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