| Abstract |
Facultative anaerobic Gram-negative bacteria, designated strains 2210JD6-5T and 2308TA14-22T, were isolated from a seashell and a marine conch, respectively, in the Republic of Korea, and subjected to detailed taxonomic analysis. The cells exhibited catalase and oxidase activity, were non-motile and were rod-shaped. Both novel strains were mesophilic, grew optimally at neutral pH and were slightly halophilic. Phylogenetic analyses based on 16S rRNA gene and whole-genome sequences demonstrated that strains 2210JD6-5T and 2308TA14-22T were affiliated with the genus Aureibaculum. The digital DNA-DNA hybridization and average nucleotide identity values between strains 2210JD6-5T and 2308TA14-22T and type strains of the most closely related species were below the cut-off thresholds. Both strains possessed DNA G+C contents of 33.5 mol%. The predominant cellular fatty acids and the sole respiratory quinone in these two strains were iso-C15 : 0, iso-C15 : 1 G and iso-C17 : 0 3-OH and MK-6, respectively. Strains 2210JD6-5T and 2308TA14-22T shared polar lipids, such as phosphoethanolamine, aminophospholipid, unidentified aminolipid and unidentified lipid. Based on phylogenetic, genomic relatedness and chemotaxonomic characteristics, strains 2210JD6-5T and 2308TA14-22T represent a novel species within the genus Aureibaculum, for which the names Aureibaculum koreense sp. nov. (2210JD6-5T=KCTC 102167T=JCM 37322T) and Aureibaculum conchae sp. nov. (2308TA14-22T=KCTC 102250T=JCM 37321T) are proposed.
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