title: A detailed phylogeny for the Methanomicrobiales.
abstract: The small subunit rRNA sequence of twenty archaea, members of the Methanomicrobiales, permits a detailed phylogenetic tree to be inferred for the group.  The tree confirms earlier studies, based on far fewer sequences, in showing the group to be divided into two major clusters, temporarily designated the "methanosarcina" group and the "methanogenium" group.  The tree also defines phylogenetic relationships within these two groups, which in some cases do not agree with the phylogenetic relationships implied by current taxonomic names--a problem most acute for the genus Methanogenium and its relatives.  The present phylogenetic characterization provides the basis for a consistent taxonomic restructuring of this major methanogenic taxon.
authors.affiliation: Department of Microbiology, University of Illinois, Urbana 61801, USA.
authors.forename: P
authors.initials: P
authors.lastname: Rouvière
authors.forename: L
authors.initials: L
authors.lastname: Mandelco
authors.forename: S
authors.initials: S
authors.lastname: Winker
authors.forename: C R
authors.initials: CR
authors.lastname: Woese
mesh_terms: D001105:Archaea; D001483:Base Sequence; D005075:Biological Evolution; D017018:Methanomicrobiales / Q000145:classification* / Q000235:genetics; D008969:Molecular Sequence Data; D010802:Phylogeny; D012329:RNA, Bacterial / Q000145:classification / Q000235:genetics*; D012336:RNA, Ribosomal, 16S / Q000145:classification / Q000235:genetics*; D012689:Sequence Homology, Nucleic Acid
chemical_list: D012329:RNA, Bacterial; D012336:RNA, Ribosomal, 16S