Abstract
A Gram-stain-negative, non-spore-forming, motile, aerobic bacterium (strain C21T) was isolated from coral and identified using polyphasic identification approach. Global alignment of 16S rRNA gene sequences indicated that strain C21T shares 95.7 % sequence identity to its closest neighbour, Marinibactrum halimedae NBRC 110095T, followed by other type strains with identities of lower than 95 %. The average nucleotide identity and average amino acid identity values between strain C21T and M. halimedae NBRC 110095T were 69.6 and 64.8 %, respectively, indicating that strain C21T may represent a new species in a new genus. Phylogenetic analysis based on 16S rRNA gene and phylogenomic results indicated that strain C21T forms a distinct branch in the family Cellvibrionaceae. Cellular fatty acids and polar lipids could also readily distinguish strain C21T from closely related type strains. Therefore, strain C21T is suggested to represent a new species in a new genus, for which the name Sessilibacter corallicola gen. nov., sp. nov. is proposed. The type strain is C21T (=MCCC 1K03260T=KCTC 62317T).
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