Reclassification of and as comb. nov. and comb. nov., respectively.

Members of the genus within the phylum are Gram-stain-positive, aerobic, endospore-forming, obligate thermophiles. In 2016, the genus was subdivided into two genera based on whole-genome approaches. The new genus, , comprises five genomospecies. In this study, we recommend the reclassification of two species, and , into the genus . We have applied whole genome approaches to estimate the phylogenetic relatedness among the 18 and 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 and belong to the genus . Furthermore, a phylogeny based on comparison of the 16S rRNA gene sequences, gene sequences and core genes identified from the whole-genome analyses designated that the type strains of and belong in the genus . With these findings, we consequently propose that and should be reclassified as comb. nov. and comb. nov.