A Gram-positive, aerobic, non-motile, mesophilic strain, designated YIM 45721 T , was isolated from a rhizosphere soil sample in Yunnan Province, China. On the basis of 16S rRNA gene sequence similarity analysis, strain YIM 45721 T was assigned to the genus Microlunatus and was most closely related to the type strain of Microlunatus phosphovorus (98.2 % 16S rRNA gene sequence similarity). Chemotaxonomic data, including cell-wall peptidoglycan structure, menaquinones and fatty acid profile,

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... rted affiliation of strain YIM 45721 T to the genus Microlunatus. Results of DNA-DNA hybridization and physiological and biochemical tests enabled strain YIM 45721 T to be differentiated genotypically and phenotypically from M. phosphovorus. Therefore, strain YIM 45721 T represents a novel species of the genus Microlunatus, for which the name Microlunatus aurantiacus sp. nov. is proposed. The type strain is YIM 45721 T (5CCTCC AB 206067 T 5DSM 18424 T ). Abbreviation: LL-DAP, LL-diaminopimelic acid. The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain YIM 45721 T is EF601828.