Nash, T.H., Ryan, B.D., Gries, C., Bungartz, F., (eds.) 2004. Lichen Flora of the Greater Sonoran Desert Region. Vol 2.
Buelliella: Fink, Lich. Fl. U.S.: 372 (1935). Life habit: lichenicolous, not gall-inducing Ascomata: black, small apothecioid pseudothecia, at first semi-immersed, closed, globose, when mature sessile and apothecioid; ascomatal wall: brown to blackish; peridial wall: in section seen as textura globosa; hymenium: hyaline, mostly I-, hymenial gel of some species I+ bluish; some species with non-crystallized epihymenial pigments of different colors hamathecium: present as paraphysoids: not very numerous, with branches and anastomoses asci: broadly cylindrical to broadly clavate, fissitunicate, with distinct ocular chamber when young, mostly 8-spored ascospores: for a long time hyaline to pale, finally brown, 1-septate, rarely with additional septa, with a delicate wall, constricted at the median septum, with upper spore cell regularly broader than lower one Conidiomata: not observed Geography: widely distributed, but with center of distribution in semi-arid mediterranean to subtropical regions Substrate: type species on thallus of Pertusaria sp., other species restricted to other lichenized host genera, Notes: Buelliella is a peculiar genus of Dothidealean lichenicolous fungi. Initially it has perithecioid ascomata, but they become apothecioid in later stages of development. The closest relative is probably not Karschia, with which Buelliella species are sometimes confused but must be searched among perithecioid Dothideales.