Nash, T.H., Ryan, B.D., Gries, C., Bungartz, F., (eds.) 2004. Lichen Flora of the Greater Sonoran Desert Region. Vol 2.
Life habit: parasitic on plants, rarely on lichens Ascomata: perithecial teleomorph known in some species, unknown in lichenicolous species Conidiomata: pycnidial, dispersed, globose, brown to dark brown, immersed, unilocular, ostiolate; wall: pale to dark brown, thin, of textura angularis conidiophores: absent conidiogenous cells: lining the pycnidial cavity, hyaline, enteroblastic, phialidic, determinate, discrete, doliiform, lageniform or short cylindrical, hyaline, smooth conidia: arising singly, hyaline, narrowly ellipsoid to subcylindrical, 1(-3)-septate, thin-walled, smooth Geography: cosmopolitan Substrate: on leaves and stems of plants, rarely on thalli or apothecia of lichens. Notes: The genus Ascochyta is mainly distinguished from Phoma by its 1-septate conidia. Ultrastructural studies attempting to separate both genera were difficult to relate to light-microscopical observations. Two lichenicolous species are known.