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

Two Gram-stain-negative, strictly aerobic rods, designated as RMAR6-6 and KMA01, exhibiting catalase- and oxidase-positive activities, were isolated from marine red algae in the Republic of Korea. Cells of strain RMAR6-6 exhibited flagellar motility, while those of strain KMA01 were non-motile. Strain RMAR6-6 exhibited optimal growth at 30-35°C and pH 7.0-8.0 with 4.0-6.0 % (w/v) NaCl, while strain KMA01 grew optimally at 30-35 °C, pH 7.0-8.0 and 2.0-5.0% NaCl. Both strains shared common major respiratory isoprenoid quinone (ubiquinone-10), cellular fatty acids (C, C 7 11-methyl, C 7 and summed feature 8) and polar lipids (phosphatidylglycerol, phosphatidylmonomethylethanolamine, diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylcholine and sulphoquinovosyldiacylglycerol). The genomic DNA G+C contents were 59.0 and 55.0 mol% for strains RMAR6-6 and KMA01, respectively. With 98.5 % 16S rRNA gene similarity, 75.2 % average nucleotide identity (ANI) and 19.8 % digital DNA-DNA hybridization (dDDH) values, strains RMAR6-6 and KMA01 were identified as representing distinct species. Phylogenetic analyses based on both 16S rRNA gene and genome sequences revealed that strains RMAR6-6 and KMA01 formed distinct phylogenic lineages within the genus , most closely related to IAM 12614 and CECT 5094, respectively. The ANI and dDDH values between strain RMAR6-6 and IAM 12614 were 87.5 and 33.3 %, respectively. Similarly, the values between KMA01 and CECT 5094 were 74.2 % (ANI) and 19.3 % (dDDH). Based on phenotypic, chemotaxonomic and molecular characteristics, strains RMAR6-6 and KMA01 represent two novel species of the genus , for which the names sp. nov. (RMAR6-6=KACC 22482=JCM 34977) and sp. nov. (KMA01=KACC 22479=JCM 34597) are proposed, respectively.