The distribution of these molecules is restricted to strains in the suborder Corynebacterineae which include the genera Hoyosella, Amycolicicoccus, Corynebacterium, Dietzia, Gordonia, Hoyosella, Millisia, Mycobacterium, Nocardia, Rhodococcus, Segniliparus, Skermania, Smaragdicoccus, Tsukamurella, and
Williamsia [65, 66].
(7) Other mycolic acid-containing bacteria belong to the genera Corynebacterium, Dietzia, Gordonia, Millisia, Nocardia, Segniliparus, Skermania, Smaragdicoccus, Tomitella, Tsukamurella, and
Williamsia. Mycolic-acids are considered very important chemotaxonomic markers, and their identification by TLC is a useful tool, especially in the screening of members of some genera.
To the Editor: Bacteria of the genus Williamsia are mycolic acid containing actinomycetes of the suborder Corynebacterineae (1).
Since no interpretive criteria exist for Williamsia spp., those previously reported for Nocardia spp.