Mesonia aestuariivivens sp. nov., Isolated From a Tidal Flat

Abstract A Gram-negative, aerobic, non-flagellated and ovoid or rod-shaped bacterial strain (JHPTF-M18T), which was isolated from a tidal flat sediment in Republic of Korea, was taxonomically characterized. 16S rRNA gene sequence analysis showed that strain JHPTF-M18T forms phylogenetic lineage within the radiation comprising type strains of Mesonia species. The 16S rRNA gene of strain JHPTF-M18T shared sequence similarities of 97.7% with that of type strain of M. mobilis and 92.9-96.8% with those of type strains of eight other Mesonia species. The DNA G+C content was 33.1% based on its genomic sequence. ANI and dDDH values between strain JHPTF-M18T and the type strains of M. mobilis, M. oceanica, M. phycicola and M. algae were 73.1-79.7% and 18.5-22.8%, respectively. Strain JHPTF-M18T contained MK-6 as the predominant menaquinone and iso-C15:0, iso-C17:0 3-OH and summed feature 3 (C16:1 ω7c and/or C16:1 ω6c) as its major fatty acids. Major polar lipids of strain JHPTF-M18T were phosphatidylethanolamine and two unidentified lipids. Strain JHPTF-M18T was separated from recognized Mesonia species by its phenotypic properties together with the phylogenetic and genetic distinctiveness. Based on data presented in this study, strain JHPTF-M18T is considered to represent a novel species of the genus Mesonia. The name Mesonia aestuariivivens sp. nov. is proposed for JHPTF-M18T (= KACC 22185T = NBRC 115119T).