TYPE. INDONESIA. Maluku, Amboina Island, 1857, C.L. Doleschall s.n. (W, holotype; M M-0024231 / 553510 / 232760, isotype; MICH, isotype).

Description. Life form: lichenized fungus.

Thallus crustose, greenish yellow, thin, continuous, smooth, corticate; vegetative diaspores absent. Photobiont trentepohlioid alga. Ascomata lirellae, immersed to erumpent, with lateral thalline margin, short to elongate, curved or sinuouse, sparsely to radially-branched, labiae convergent, striate, black, epruinose; disk not visible from above. Exciple apically carbonized; hymenium hyaline, not inspersed, 50-100 µm high. Asci 8-spored; ascospores hyaline, 6-12-celled, 33-38 × 5-6 µm.

Chemistry. No substances detected by TLC; spores I+ blue.

Substrate and Habitat. Corticolous on hardwood trees.

Distribution. Eastern Paleotropical and Neotropical north into eastern North America; in North Carolina found in Coastal Plain ecoregion.

Literature

Kalb, J., R. Lücking & K. Kalb. (2018) The lichen genera Allographa and Graphis (Ascomycota: Ostropales, Graphidaceae) in Thailand – eleven new species, forty-seven new records and a key to all one hundred and fifteen species so far recorded for the country. Phytotaxa 377(1): 1-83.

Krempelhuber, A. von. (1871) Flechten aus Amboina. Verhandlungen der Kaiserlich-Königlichen Zoologisch-Botanischen Gesellschaft in Wien. 21: 861-872 (original description).

Lücking, R., A.W. Archer & A. Aptroot. (2009) A world-wide key to the genus Graphis (Ostropales: Graphidaceae). The Lichenologist 41(4): 363-432.