Distribution. Neoptropics north into eastern North America along the Gulf and Atlantic coasts; in North Carolina found along the coast.
Kalb, K., B. Staiger & J.A. Elix. (2004). A monograph of the lichen genus Diorygma – a first attempt. Symbolae Botanicae Upsaliensis34(1): 133-181.
Tripp, E.A., J.C. Lendemer & R.C. Harris (2010) Resolving the genus Graphina Müll. Arg. in North America: new species, new combinations, and treatments for Acanthothecis, Carbacanthographis, and Diorygma. Lichenologist42(1): 55-71.
Tuckerman, E. (1888) A synopsis of the North American lichens. Part. II. Comprising the Lecideacei, and (in part) the Graphidacei. New Bedford, Mass. 176 pp (original description as Graphis leucopepla).