A novel Gram-stain-positive actinobacterium, designated strain SCSIO 11529(T), was isolated from tissues of the stony coral Galaxea fascicularis, and characterized by using a polyphasic approach. The temperature range for growth was 22-50 °C (optimum 28-45 °C), the pH range for growth was 6.0-8.0 (optimum pH 7.0), and the NaCl concentration range for growth was 0-7% (w/v) NaCl. The polar lipid profile contained diphosphatidylglycerol, phosphatidylcholine, phosphatidylglycerol, phosphatidylmethylethanolamine, phosphatidylethanolamine and an unknown polar lipid. The predominant menaquinone was MK-9(H4). The major fatty acids (>10%) were iso-C16:0, iso-C17:1ω6c, iso-C16:1 H and C16:1ω7c/iso-C15:0 2-OH. The DNA G+C content of strain SCSIO 11529(T) was 70.2 mol%. Phylogenetic analysis based on 16S rRNA gene sequences showed that strain SCSIO 11529(T) belongs to the genus Prauserella, with the closest neighbours being Prauserella marina MS498(T) (97.0% 16S rRNA gene sequence similarity), Prauserella rugosa DSM 43194(T) (96.4%) and Prauserella flava YIM 90630(T) (95.9%). Based on the evidence of the present study, strain SCSIO 11529(T) is considered to represent a novel species of the genus Prauserella, for which the name Prauserella coralliicola sp. nov. is proposed. The type strain is SCSIO 11529(T) ( = DSM 45821(T) = NBRC 109418(T)).
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