TYPE. UNITED STATES. NEW YORK, Suffolk County (Long Island), Three Mile Harbor, on bark of Acer rubrum in bog, 12.VII.1960, I.M. Brodo 1035 (MSC 109314, holotype).

Description. Lichenized fungus.

Thallus crustose, grayish, continuous; surface smooth to cracked to minutely verrucose; vegetative diaspores absent. Medulla thin, white; photobiont chlorococcoid alga; Ascomata pertusaroid apothecia (in thalline warts); fertile warts scattered, flat-topped, 0.5-1.3 mm; ostioles 3-7 per wart, mostly black.  Apothecia 1-7 per wart, 0.35-0.65 um diam., center hyaline to white; epithecium dark, K+ violet; hypothecium hyaline, occasionally pale to dark brownish; paraphyses thin, anastomosed; asci cylindrical, thick-walled, 193-287 x 36-45 μm, 2-celled in one row. Ascospores hyaline, simple, double-walled, 100-160 x 35-45 μm. Pycnidia not reported.

Chemistry. Cortex UV-, K-, C-, PD-; medulla K+ yellow turning red-brown, KC-, C-, PD+ yellow turning orange-red; fumarprotocetraric acid, protocetraric acid and an unidentified xanthone.

Substrate and Habitat. Corticolous on hardwood trees in forests.

Distribution. Eastern North America, east Asia (China, Thailand); in North Carolina throughout.

Literature

Brodo, I.M. (1968) The Lichens of Long Island, New York: A Vegetational and Floristic Analysis. Bulletin 410, New York State Museum & Science Service, University State of New York, Albany. x + 330 pp (original description).

Dibben, M.J. (1980) The Chemosystematics of the Lichen Genus Pertusaria in North America North of Mexico. Publications in Biology and Geology No. 5, Milwaukee Public Museum Press, Milwaukee. 162 pp.

Zhao, Z.T., R. Qiang Ren & An Aptroot. (2009) An Annotated Key to the Lichen Genus Pertusaria in China. The Bryologist 107(4): 531-541.