1887

Abstract

In 1994, analyses of clostridial 16S rRNA gene sequences led to the assignment of 18 species to cluster XI, separating them from ( cluster I). Subsequently, most cluster XI species have been assigned to the family with some species being reassigned to new genera. However, several misclassified species remained, creating a taxonomic conundrum and confusion regarding their status. Here, we have re-examined the phylogeny of cluster XI species by comparing the 16S rRNA gene-based trees with protein- and genome-based trees, where available. The resulting phylogeny of the was consistent with the recent proposals on creating seven new genera within this family. This analysis also revealed a tight clustering of and . Based on these data, we propose reassigning these two organisms to the new genus as gen. nov. comb. nov. (the type species of the genus) and comb. nov., respectively. As correctly noted in the original publications, the genera and also fall within cluster XI, and can be assigned to the , which falls within radiation of genus , is proposed to be reclassified as comb. nov. The remaining misnamed members of the , [] , [] and [] , still remain to be properly classified.

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2016-12-01
2024-03-29
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