Revised phylogeny of Bacteroidetes and proposal of sixteen new taxa and two new combinations including Rhodothermaeota phyl. nov

Members of the phylum Bacteroidetes, which was originally defined as a monophyletic branch encompassing the genera Cytophaga, Flavobacterium and Bacteroides (CFB), are widely studied due to their importance in environmental and gut microbiology. As a consequence, the number of species names with sta...

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Bibliographic Details
Published in:Systematic and applied microbiology 2016-07, Vol.39 (5), p.281-296
Main Authors: Munoz, Raul, Rosselló-Móra, Ramon, Amann, Rudolf
Format: Article
Language:English
Subjects:
16S rRNA
23S rRNA
Adenosine Triphosphatases - genetics
Alanine-tRNA Ligase - genetics
Amino Acid Sequence
ATP synthetase
Bacterial Proteins - genetics
Bacteroides
Bacteroidetes
Bacteroidetes - classification
Bacteroidetes - genetics
Base Sequence
Cytophaga
DNA, Bacterial - genetics
Flavobacterium
Indels
MLSA
Multilocus Sequence Typing
Phylogeny
Rhodothermaeota
RNA, Ribosomal, 16S - genetics
RNA, Ribosomal, 23S - genetics
Sequence Alignment
Sequence Analysis, DNA
Signatures
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Summary:Members of the phylum Bacteroidetes, which was originally defined as a monophyletic branch encompassing the genera Cytophaga, Flavobacterium and Bacteroides (CFB), are widely studied due to their importance in environmental and gut microbiology. As a consequence, the number of species names with standing in nomenclature has doubled in the past five years. In this study, a revision of an earlier phylogeny of Bacteroidetes has been performed using the 16S rRNA gene as a backbone in combination with the 23S rRNA gene, as well as multilocus sequence analysis (MLSA) of 29 orthologous protein sequences, and indels in the sequences of the beta subunit of the F-type ATPase and the alanyl-tRNA synthetase. In addition, taxonomic data for Bacteroidetes has been updated by considering the orphan species list, signature nucleotides in the 16S rRNA sequence, the list of outlier species, and discrepancies with the current taxonomy at the genus rank level. As a result, seven new taxa are proposed within Bacteroidetes (Chitinophagia classis nov., Chitinophagales ord. nov., Crocinitomicaceae fam. nov., Odoribacteraceae fam. nov., Hymenobacteraceae fam. nov., Thermonemataceae fam. nov. and Persicobacteraceae fam. nov.), as well as one new phylum Rhodothermaeota phyl. nov. that contains two classes, two orders, four families and a new genus with two new combinations.
ISSN:0723-2020
1618-0984
DOI:10.1016/j.syapm.2016.04.004