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Genus	Species
Candidatus Alkanophaga	2
Candidatus Argoarchaeum	1
Candidatus Ethanoperedens	1
Candidatus Methanocomedens	1
Candidatus Methanofilum	1
Candidatus Methanofrustulum	1
Candidatus Methanogaster	3
Candidatus Methanomarinus	2
Candidatus Methanoperedens	5
Candidatus Methanophaga	5
Candidatus Methanospirare	1
Candidatus Methanovorans	1
Candidatus Methanoxibalbensis	1
Candidatus Syntropharchaeum	5
Halomethanococcus	0
Methanimicrococcus	9
Methanocalculus	65
Methanocella	7
Methanochimaera	1
Methanococcoides	28
Methanocorpusculum	24
Methanocrinis	4
Methanoculleus	219
Methanofollis	15
Methanogenium	13
Methanohalobium	4
Methanohalophilus	28
Methanolacinia	4
Methanolapillus	3
Methanolinea	37
Methanolobus	39
Methanomethylovorans	36
Methanomicrobium	58
Methanooceanicella	1
Methanoplanus	34
Methanorbis	3
Methanoregula	29
Methanosalsum	9
Methanosarcina	239
Methanosphaerula	5
Methanospirillum	28
Methanothrix	314
Methanovulcanius	1
Methermicoccus	3