Pseudovibrio axinellae sp. nov., isolated from an Irish marine sponge

A Gram-negative, motile, rod-shaped bacterial strain, designated Ad2^T, was isolated from a marine sponge, Axinella dissimilis, which was collected from a semi-enclosed marine lake in Ireland. Strain Ad2^T grew optimally at 24°C, at pH 7.0 and in the presence of 3% (w/v) NaCl. Phylogenetic analysis based on 16S rRNA gene sequences showed that strain Ad2^T clustered with members of the genus Pseudovibrio, and showed 97.3-98.2% sequence similarity to the type strains of recognized Pseudovibrio species. DNA-DNA relatedness values between strain Ad2^T and the type strains of other Pseudovibrio species were <27%. The DNA G+C content of strain Ad2^T was 50.5 mol%. The major fatty acid was 18: 1ω7c. Differences in phenotypic properties, together with phylogenetic and DNA-DNA hybridization analyses, indicated that strain Ad2^T represented a novel species of the genus Pseudovibrio. The name Pseudovibrio axinellae sp. nov. is proposed, with Ad2^T (=DSM 24994^T=NCIMB 14761^T) as the type strain.