Two bacterial strains, designated BBH5 and BBH7, were isolated from a deep-sea sediment sample collected from the Chagos Trench of the Indian Ocean (1 ° 06′ S 7 ° 31′ E). Based on their 16S rRNA gene sequence similarity (99.9 %), level of DNA–DNA relatedness (93 %) and a number of similar phenotypic characteristics, the two strains are identified as representing the same species. Their phylogenetically nearest neighbours, based on 16S rRNA gene sequence similarity values (97.9–98.4 %), were identified as , , and . However, strains BBH5 and BBH7 could be distinguished from the above four species by a number of phenotypic characteristics, and levels of DNA–DNA relatedness between the two new isolates and these species were 35–42 %. Therefore, strains BBH5 and BBH7 are considered to represent a novel species of the genus , for which the name sp. nov. is proposed. The type strain is BBH7 (=LMG 23457 =IAM 15353).


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[PDF file of Supplementary Tables S1 and S2](38 KB)


Extended neighbour-joining phylogenetic tree based on 16S rRNA gene sequences showing the phylogenetic relationship between sp. nov. strains BBH5 and BBH7 and all species of . [PDF file of Supplementary Fig. S1](18 KB)


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