Arenibacter lacus sp. nov., Isolated from Chilika Lagoon, India

A shiny dark yellow pigmented, Gram-stain-negative, rod-shaped, non-motile bacterium, designated as strain JC631^T, was isolated from the sediment ecosystem of Chilika lagoon, India. Strain JC631^T tolerates up to pH 10 and NaCl up to 3% (w/v). MK6 is the only respiratory quinone. Predominant (> 10%) cellular fatty acids are anteiso-C_11:0, anteiso-C_13:0, and anteiso-C_15:0. Major polar lipids are phosphatidylethanolamine, phosphatidylcholine, a few unidentified phospholipids, and a few unidentified aminolipids. 16S rRNA gene sequencing showed that strain JC631^T shared the highest sequence identity (98.7%) with Arenibacter latericius KMM 426^T followed by Arenibacter certesii CCUG 48006^T (98.6%) and other members of the genus Arenibacter (< 97%). The genome size of strain JC631^T is 4.16 Mb with a GC content of 40.8 mol%. Strain JC631^T has ANI scores of 78.3% and 78.1%; dDDH values of 22.2% and 21.8%, respectively, with the type strains of A. latericius and A. certesii. The genomic distinction is well supported by chemotaxonomic characteristics and differential physiological properties. This supports strain JC631^T to be described as a new species of the genus Arenibacter, named as Arenibacter lacus sp. nov. The type strain is JC631^T (= KCTC 72002^T = NBRC 114071^T).