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Int J Syst Evol Microbiol 59 (2009), 1028-1035; DOI  10.1099/ijs.0.006718-0
© 2009 International Union of Microbiological Societies

Description of ‘Synergistetes’ phyl. nov. and emended description of the phylum ‘Deferribacteres’ and of the family Syntrophomonadaceae, phylum ‘Firmicutes’

Estelle Jumas-Bilak1, Laurent Roudière1 and Hélène Marchandin1,2

1 Université Montpellier 1, Laboratoire de Bactériologie-Virologie, EA 3755, Faculté de Pharmacie, 15, Avenue Charles Flahault, BP 14491, 34060 Montpellier Cedex 5, France
2 Centre Hospitalier Universitaire de Montpellier, Hôpital Arnaud de Villeneuve, Laboratoire de Bactériologie, 371 Avenue du Doyen Gaston Giraud, 34295 Montpellier Cedex 5, France

Correspondence
Estelle Jumas-Bilak
ebilak{at}univ-montp1.fr

The number of bacterial phyla has greatly increased in the past decade. Among them, a candidate division named ‘Synergistes’ was proposed in a phylogenetic study on the global diversity of bacteria. We previously described the genus Jonquetella and suggested that it belonged to this not yet well-delineated candidate phylum. 16S rRNA gene based-phylogeny studies were conducted using four reconstruction methods and 599 sequences forming five datasets were used in an alternative treeing approach. These analyses indicated that the genera Aminiphilus, Aminobacterium, Aminomonas, Anaerobaculum, Dethiosulfovibrio, Jonquetella, Synergistes, Thermanaerovibrio and Thermovirga should be grouped in the same high-level taxon. This taxon was shown to be a phylum-rank lineage in the domain Bacteria and, because of the prior use of the name Synergistes for a genus, the name ‘Synergistetes’ is proposed for this candidate phylum. We also propose an emended delineation of the phylum ‘Deferribacteres’, which is now only represented by the family Deferribacteriaceae. The emended family Syntrophomonadaceae is limited to the genera Pelospora, Syntrophomonas, Syntrophothermus and Thermosyntropha.

Abbreviations: ED, evolutionary distance; ML, maximum-likelihood; MP, maximum-parsimony

The GenBank/EMBL/DDBJ accession numbers for the 16S rRNA gene sequences used in this study are given in Supplementary Table S1 in IJSEM Online.

A table of sequences used for the construction of datasets 1–5 and complete maximum-likelihood 16S rRNA gene-based phylogenetic trees reconstructed from the five datasets are available as supplementary material with the online version of this paper.






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Copyright © 2009 by the International Union of Microbiological Societies.