1887

Abstract

A thermophilic, aerobic, Gram-stain-negative, filamentous bacterium, strain PRI-4131, was isolated from an intertidal hot spring in Isafjardardjup, NW Iceland. The strain grew chemo-organotrophically on various carbohydrates. The temperature range for growth was 40–65 °C (optimum 55 °C), the pH range was pH 6.5–9.0 (optimum pH 7.0) and the NaCl range was 0–3 % (w/v) (optimum 0.5 %). Phylogenetic analysis based on 16S rRNA gene sequences revealed that strain PRI-4131 represented a distinct lineage within the class of the phylum . The highest levels of sequence similarity, about 91 %, were with STL-6-O1 and D1-25-10-4. Fermentative growth was not observed for strain PRI-4131, which, in addition to other characteristics, distinguished it from the two species. Owing to both phylogenetic and phenotypic differences from the described members of the class , we propose to accommodate strain PRI-4131 in a novel species in a new genus, gen. nov., sp. nov. The type strain of is PRI-4131 ( = DSM 25763  = ATCC BAA-2444).

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2013-03-01
2019-09-22
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