Description of Albimonas marina sp. nov., isolated from sea sand on the Yellow Sea Coast.

A Gram-stain-negative, anaerobic, short rod-shaped bacterium, designated as CAU 1670T, was isolated from a sea sand sample collected from Masiran Beach, Republic of Korea. Optimal growth conditions for the bacterium were identified as growth media containing 0-3% (w/v) NaCl at 30 °C and pH 5.5. Strain CAU 1670T exhibited high 16S rRNA gene sequence similarity with Albimonas pacifica CGMCC 1.11030T (97.8% similarity) and Albimonas donghaensis DSM 17,890T (94.8% similarity). The phylogeny tree based on the 16 S rRNA gene and core housekeeping gene sequences showed that strain CAU 1670T belonged to the genus Albimonas. The major fatty acids included summed feature 8 (C18:1 ω7c and/or C18:1 ω6c), and the predominant respiratory quinone was Q-10. The G + C content of the type strain genome was 72.6%. The average nucleotide identity and digital DNA-DNA hybridization values between strain CAU 1670T and reference strains were 78.5-86.4% and 22.1-31.0%, respectively. Pan-genome analysis demonstrated that strain CAU 1670T and reference strains shared 2,010 core genes. Based on phenotypic, phylogenetic, and chemotaxonomic characteristics, strain CAU 1670T represents a novel species within the genus Albimonas, for which the name Albimonas marina sp. nov. is proposed. The type strain is CAU 1670T (= KCTC 92734T; = MCCC 1K08481T).