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A novel actinomycete, designated strain 1H-SSA4 T , was isolated from the head of an ant (Camponotus japonicus Mayr) and was found to produce angucyclinone antibiotics. A polyphasic approach was used to determine the taxonomic status of strain 1H-SSA4 T . The DNA G+C content of the draft genome sequence, consisting of 11.4 Mbp, was 70.0 mol%. 16S rRNA gene sequence similarity studies showed that strain 1H-SSA4 T belongs to the genus Streptomyces with the highest sequence similarity to Streptomyces hygroscopicus subsp. ossamyceticus NBRC 13983 T (98.9 %), and phylogenetically clustered with this species, Streptomyces torulosus LMG 20305 T (98.8 %), Streptomyces ipomoeae NBRC 13050 T (98.5 %) and Streptomyces decoyicus NRRL 2666 T (98.4 %). The morphological and chemotaxonomic properties of the strain were also consistent with those members of the genus Streptomyces. A combination of DNA-DNA hybridization experiments and phenotypic tests were carried out between strain 1H-SSA4 T and the above-mentioned strains, which further clarified their relatedness and demonstrated that strain 1H-SSA4 T could be distinguished from these strains. Therefore, the strain is concluded to represent a novel species of the genus Streptomyces, for which the name Streptomyces capitiformicae sp. nov. is proposed. The type strain is 1H-SSA4 T (=CGMCC 4.7403 T =DSM 104537 T ).

Streptomyces capitiformicae sp. nov., a novel actinomycete producing angucyclinone antibiotics isolated from the head of Camponotus japonicus Mayr