TYPE. BRAZIL. Brasilia privinc., C.F.P. Martius s.n. (M M-0102170 / 554394 / 233644, lectotype designated by B. Staiger & M. Mathis-Leight, 2000).

Description. Life form: lichenized fungus.

Thallus crustose, epiphloedal, whitish to pale yellowish, thick, rimose to rimose-areolate; surface dull, epruinose; vegetative diaspores absent; prothallus present as a thin black line. Photobiont trentepohlioid alga. Ascomata lirellae, short, elliptical to oblong, 0.3-1.0 mm long, prominent; thalline margin distinct; excipular margin thin, indistinct, raised; disk open, flat, brown-blackish, epruinose. Exciple laterally carbonized, pale yellowish brown below; hymenium hyaline, inspersed, I-. Asci 8-spored; ascospores brownish, narrowly oblone, 5-7-septate, 17-26 x 6-8 μm.

Chemistry. UV+ bright yellow (lichexanthone); K+ yellow turning red (norstictic acid).

Substrate and Habitat. Corticolous hardwood trees.

Distribution. Neotropical north into southeastern North America; in North Carolina found in the Coastal Plain ecoregion.

Literature

Bungartz, F. R. Lücking & A. Aptroot (2009) The lichen family Graphidaceae (Ostropales, Lecanoromycetes) in the Galapagos Islands. Nova Hedwigia 90: 1-44.

Eschweiler, F.G. (1833) Lichenes. Pp. 51-293 In Martius, C.F.P. von. Flora Brasiliensis seu enumeratio plantarum in Brasilia etc. provenientium. 1, Pars prima. Algae, Lichenes, Hepaticae. Tübingen (original description as Leiogramma punctiforme).

Lücking, R., F. Seavey, R. Common, S.Q. Beeching, O. Breuss, W.R. Buck, L. Crane, M. Hodges, B.P. Hodkinson, E. Lay, J.C. Lendemer, R.T. McMullin, J.A. Mercado-Díaz, M.P. Nelsen, E. Rivas Plata, W. Safranek, W.B. Sanders, H.P. Schaefer Jr., & J. Seavey. (2011) The lichens of Fakahatchee Strand Preserve State Park, Florida: Proceedings from the 18th Tuckerman Workshop. Bulletin of the Florida Museum of Natural History 49(4): 127-186.

Seavey, F., J. Seavey, J. Gagnon, J. Guccion, B. Kaminsky, J. Pearson, A. Podaril, & B. Randall. (2017) The lichens of Dagny Johnson Key Largo Hammock Botanical State Park, Key Largo, Florida, USA. Bulletin of the Florida Museum of Natural History 53(5): 201–268.