- Volume 70, Issue 12, 2020
Volume 70, Issue 12, 2020
- Taxonomic Note
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Reclassification of Geobacillus galactosidasius and Geobacillus yumthangensis as Parageobacillus galactosidasius comb. nov. and Parageobacillus yumthangensis comb. nov., respectively
More LessMembers of the genus Geobacillus within the phylum Firmicutes are Gram-stain-positive, aerobic, endospore-forming, obligate thermophiles. In 2016, the genus Geobacillus was subdivided into two genera based on whole-genome approaches. The new genus, Parageobacillus , comprises five genomospecies. In this study, we recommend the reclassification of two Geobacillus species, Geobacillus galactosidasius and Geobacillus yumthangensis , into the genus Parageobacillus . We have applied whole genome approaches to estimate the phylogenetic relatedness among the 18 Geobacillus and Parageobacillus type strains for which genome sequences are currently publicly available. The phylogenomic metrics AAI (average amino acid identity), ANI (average nucleotide identity) and dDDH (digital DNA–DNA hybridization) denoted that the type strains of G. galactosidasius and G. yumthangensis belong to the genus Parageobacillus . Furthermore, a phylogeny based on comparison of the 16S rRNA gene sequences, recN gene sequences and core genes identified from the whole-genome analyses designated that the type strains of G. galactosidasius and G. yumthangensis belong in the genus Parageobacillus . With these findings, we consequently propose that G. galactosidasius and G. yumthangensis should be reclassified as Parageobacillus galactosidasius comb. nov. and Parageobacillus yumthangensis comb. nov.
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Phylogenetic analysis supporting the taxonomic revision of eight genera within the bacterial order Enterobacterales
More LessThe diverse members of the Enterobacterales are agriculturally and medically relevant species that have continued to undergo taxonomic revision. To assess the current taxonomy of 64 genera of the Enterobacterales , we carried out a phylogenetic analysis using 32 single-copy core proteins. The resulting phylogeny was robust, and shows that eight genera – Biostraticola , Enterobacillus , Gibbsiella , Limnobaculum , Izhakiella , ‘Nissabacter’, Rosenbergiella and Samsonia – are currently assigned to incorrect families. Taxonomic reassignment of these genera was also supported by average amino acid identity comparisons. We propose taxonomic revision of these genera to reflect their phylogenetic position within the Enterobacterales .
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- Erratum
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Erratum: Robust demarcation of seventeen distinct Bacillus species clades, proposed as novel Bacillaceae genera, by phylogenomics and comparative genomic analyses: description of Robertmurraya kyonggiensis sp. nov. and proposal for emended genus Bacillus limiting it only to the members of the subtilis and cereus clades of species
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- Corrigendum
Volumes and issues
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Volume 74 (2024)
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