sp. nov. and sp. nov., isolated from marine red algae.

Two Gram-stain-negative, strictly aerobic, non-motile, rod-shaped bacteria, designated as strains S88 and W115, exhibiting catalase- and oxidase-positive reactions, were isolated from marine red algae in South Korea. Strain S88 exhibited growth at 20-30 °C, pH 6.0-9.0 and 2.0-5.0% (w/v) NaCl, while strain W115 grew at 20-30 °C, pH 7.0-9.0 and 2.0-5.0% (w/v) NaCl. Strain S88 contained summed feature 8 (C 7 and/or C 6), C and C 2-OH as major fatty acids (>5%), with major polar lipids being phosphatidylglycerol, phosphatidylcholine, an unidentified phospholipid, an unidentified aminolipid and two unidentified lipids. Strain W115 contained summed feature 8 (C 7 and/or C 6) and C as major fatty acids (>5%), with major polar lipids including phosphatidylglycerol, phosphatidylcholine, an unidentified phospholipid, an unidentified aminolipid and unidentified lipids. Ubiquinone-10 was the sole respiratory quinone in both strains, and the genomic DNA G+C contents were 57.0% for strain S88 and 56.5% for strain W115. Despite 99.86% 16S rRNA gene sequence similarity, strains S88 and W115 shared 88.8% average nucleotide identity (ANI) and 36.8% digital DNA-DNA hybridization (dDDH) value, indicating different species. Phylogenetic and phylogenomic analyses based on 16S rRNA gene and genome sequences, respectively, revealed that strains S88 and W115 formed a phylogenetic lineage within the genus . ANI and dDDH values of both strains with other type strains were less than 73.7 and 20.3%, respectively, confirming that they represent novel species. Based on phenotypic, chemotaxonomic and molecular characteristics, strains S88 and W115 represent two novel species of the genus , for which the names sp. nov. (S88 =KACC 23423 =JCM 36647) and sp. nov. (W115 =KACC 23690 =JCM 36651) are proposed, respectively.