Actinomadura atramentaria, a New Species of the Actinomycetales

A new species of Actinomadura, for which we propose the name Actinomadura atramentaria, was isolated from a soil sample collected in Japan. Whole-cell hydrolysates contain meso-diaminopimelic acid and a trace of madurose. MK-9(H6) is the major menaquinone, and tuberculostearic acid is the major fatty acid. No nitrogenous phospholipids or mycolic acids are present. A. atramentaria is characterized by its white aerial masses of thickly tufted short chains of two to five spores (mostly two to three spores) with smooth surfaces and by the formation of inky brown diffusible pigments. The type strain of A. atramentaria is strain SF2197 (= JCM 6250).