Muricauda oceani sp. nov., isolated from the East Pacific Ocean

A Gram-stain-negative bacterium, designated strain 501str8^T, was isolated from a sediment sample collected from the East Pacific Ocean. 16S rRNA gene sequence analysis revealed that strain 501str8^T belonged to the genus Muricauda, with closely related type strains Muricauda aquimarina SW-63^T (98.5 %), Muricauda lutimaris SMK-108^T (98.3 %) and Muricauda ruestringensis B1^T (97.9 %). Up-to-date bacterial core gene set analysis revealed that strain 501str8^T represented one independent lineage with M. aquimarina SW-63^T. The average nucleotide identity values of strain 501str8^T with M. aquimarina SW-63^T and M. lutimaris SMK-108^T were 80.2 and 81.3 %, respectively. In silico DNA-DNA hybridization values between strain 501str8^T and M. aquimarina SW-63^T and M. lutimaris SMK-108^T were 22.8 and 32.9 %, respectively. The predominant isoprenoid quinone was menaquinone-6, and iso-C_15 : 0, iso-C_17 : 0 3-OH and iso-C_15 : 1 G were the dominant cellular fatty acids. The G+C content of the genomic DNA was 42.8 mol%. Differential phylogenetic distinctiveness and chemotaxonomic differences, together with the phenotypic properties observed in this study, revealed that strain 501str8^T could be differentiated from closely related species. Therefore, we propose that strain 501str8^T represents a novel species of the genus Muricauda, for which the name Muricauda oceani sp. nov. is suggested. The type strain is 501str8^T (=JCM 33902^T=MCCC 1K04567^T).