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An alkalitolerant actinomycete strain, designated B32^T, was isolated from a Saharan soil sample collected from Adrar province (South of Algeria), and then investigated using a polyphasic taxonomic approach. The strain was observed to produce short chains of spores on the dichotomous branched aerial mycelium and formed a fragmented substrate mycelium. The optimum NaCl concentration for growth was found to be 0–5 % (w/v) and the optimum growth temperature and pH were found to be 25–35 °C and 7.0–10.0 °C, respectively. The diagnostic diamino acid in the cell-wall peptidoglycan was identified as meso-diaminopimelic acid. The predominant menaquinones of strain B32^T were identified as MK-10 (H₄) and MK-11 (H₄). The major fatty acids were found to be iso-C_16:0 and anteiso-C_15:0. The diagnostic phospholipids detected were phosphatidylcholine, phosphatidylmethylethanolamine …