An actinomycete strain, designated MSL-03T, was isolated from a soil sample collected from Bigeum Island in the Republic of Korea. The coccoid cells of the organism were Gram-positive and non-motile and did not form endospores. The colonies were yellow, small, circular with entire margins and contained meso-diaminopimelic acid as the diagnostic diamino acid in the peptidoglycan. The major menaquinone was MK-8(H4). The polar lipids detected were diphosphatidylglycerol and phosphatidylglycerol. The major fatty acids were iso-C15 : 0, iso-C16 : 0, C17 : 0, anteiso-C15 : 0, 10-methyl C17 : 0, iso-C14 : 0 and C17 : 1ω8c. The DNA G+C content was 73.4 mol%. Phylogenetic analyses based on the 16S rRNA gene sequence positioned strain MSL-03T in a clade comprising Phycicoccus jejuensis KSW2-15T and Phycicoccus dokdonensis DS-8T. The organism showed the highest level of sequence similarity with respect to P. dokdonensis DS-8T (99.58 % over 1424 nt), with differences in 64 positions out of 1488. The levels of DNA–DNA relatedness with its closest neighbours (<70 %) showed that the isolate represents a distinct genomic species. On the basis of the phenotypic and genotypic results, strain MSL-03T represents a novel species of the genus Phycicoccus, for which the name Phycicoccus bigeumensis sp. nov. is proposed. The type strain is strain MSL-03T (=KCTC 19266T =DSM 19264T).
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