Nash, T.H., Ryan, B.D., Gries, C., Bungartz, F., (eds.) 2004. Lichen Flora of the Greater Sonoran Desert Region. Vol 2.
Life habit: lichenicolous Ascomata: perithecioid, black, mostly aggregated in small groups and basally embedded in a subiculum, rarely dispersed, oval to subspherical, sometimes with short neck but always without papillae, indistinctly ostiolate, erumpent to almost sessile; ascomatal wall: dark brown, pseudoparenchymatic, composed of several layers of isodiametric cells, paler towards the centrum and there with tangentially elongated cells, normally with some conspicuous adhering vegetative hyphae; adhering vegetative hyphae: mainly inserted in the lower parts of the ascomatal wall, with brown walls, septate and ramified hymenium: hyaline, all parts I-; hamathecium: in mature perithecia present as persisting paraphyses and a crown of periphyses paraphyses: numerous, septate, mostly unbranched and without anastomoses periphyses: septate, unbranched, rarely with one ramification, without anastomoses, embedded in a gel asci: functionally unitunicate, cylindrical, without visible apical structures, (4-)8-spored ascospores: uniseriate, hyaline when young, dark brown when mature, with various shapes, +round to oval to fusiform, unicellular to submuriform, with the septa frequently close to one or both ends or oblique, not constricted at the septa; spore wall: smooth, without visible perispore, frequently with distinct germ pores Conidiomata: not observed Geography: widely distributed in the world, but with center of distribution in forested biomes Substrate: on different species of Ochrolechia and Pertusaria, and two species of Placopsis. Notes: Roselliniopsis was originally described to accommodate two related unitunicate pyrenomycetes. In the meanwhile further species have turned out to belong to that genus, which made it necessary to emend the generic description with regard to spore septation (Matzer 1993).