TYPE. UNITED STATES. Massachusetts, Weymouth, on the thallus of Pertusaria communis. 1875, H. Willey s.n. (US 00068021, isotype)

Description. Life form. Lichenicolous fungus.

Thallus absent; photobiont absent. Ascomata lecideine apothecia, up to 0.5 mm diam., immersed to sessile; disk black, concave; margin thick, persistent. Epithecium brown, consisting of paraphysal tips; hymenium hyaline; hypothecium blackish-brown. Asci 30-50-spored; ascospores 2-4-celled, brown, 7-11 x 4-6 μm.

Substrate and Habitat. Lichenicolous on Pertusaria spp.

Distribution. Eastern North America and Eurasia (Scandinavia, Russia); in North Carolina in the Piedmont and Blue Ridge ecoregions.

Literature

Ihlen, P.G., H. Holien & T. Tønsberg. (2004) Two new species of Dactylospora (Dactylosporaceae, Lecanorales), with a key to the known species in Scandinavia. The Bryologist 107(3): 357-362.

Tuckerman, E. (1882) A synopsis of the North American lichens. Part. I. Comprising the Parmeliacei, Cladoniei and Coenogoniei. S.F. Cassino, Boston, 262 pp (original description as Buellia pertusariicola).