Six thermo-acidophilic, spore-forming strains were isolated from a variety of juice products and were characterized genetically and phenotypically. According to 16S rRNA and gene phylogenetic analyses and average nucleotide identity comparisons against the species demarcation cutoff at <95 %, these six strains were determined to represent three novel species of . The isolates were designated FSL-W10-0018, FSL-W10-0037, FSL-W10-0048, VF-FSL-W10-0049, FSL-W10-0057 and FSL-W10-0059. All six isolates were Gram-positive, motile, rod shaped, contained menaquinone 7 as the major respiratory quinone and had ω-cyclohexane C as a major fatty acid. They were all able to grow aerobically in a range of acidic and moderate thermal conditions. Only isolates FSL-W10-0048 and VF-FSL-W10-0049 were able to produce guaiacol. The following names are proposed for the three new species: sp. nov. (type strain FSL-W10-0018 DSM 112016=NCIMB 15266); sp. nov (VF-FSL-W10-0049=DSM 112017=NCIMB 15265); and sp. nov. (FSL-W10-0059=DSM 112018=NCIMB 15264).
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