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Genus	Species
Candidatus Methanofilum	1
Methanocalculus	65
Methanochimaera	1
Methanocorpusculum	24
Methanoculleus	219
Methanofollis	15
Methanogenium	13
Methanolacinia	3
Methanolinea	37
Methanomicrobium	58
Methanoplanus	34
Methanorbis	3
Methanoregula	29
Methanosphaerula	5
Methanospirillum	28
Methanovulcanius	1