A Gram-positive-staining, filamentous bacterial strain that developed cylindrical sporangia containing four oval-to rod-shaped spores at the ends of short sporangiophores on branched aerial mycelium was isolated from tropical rainforest soil near a hot spring. The cell-wall peptidoglycan contained meso-diaminopimelic acid, glutamic acid and alanine as cell-wall amino acids; the whole-cell hydrolysate contained rhamnose, madurose, glucose, galactose and 3-Omethylmannose as whole-cell sugars. The predominant menaquinone was MK-9(H 4 ). Mycolic acids were not detected. The diagnostic phospholipid was phosphatidylethanolamine. The predominant cellular fatty acids were iso-C 16 : 0 and 10-methylated C 17 : 0 . The G+C content of the DNA was 71

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