Godronia
Godronia Moug. & Lév., in Mougeot, Consid. Vég. Vosges: 355 (1846)
= Topospora Fr., Fl. Scan.: 347 (1836)
Leotiomycetes, Leotiomycetidae, Helotiales, Godroniaceae
Saprobic or parasitic on the host plant in terrestrial habitats (Cash 1934, Strømeng 2011). Sexual morph: see Groves (1965). Asexual morph: Conidiomata dark brown to black, pycnidial, solitary to gregarious or confluent, at first immersed, eventually erumpent and appearing superficial, globose to oval or obpyriform, unilocular, glabrous, ostiolate. Ostiole single, circular, papillate, centrally located. Conidiomatal wall composed of thick-walled, dark brown to hyaline cells of textura oblita to textura angularis. Conidiophores arising from the inner layers of the conidiomata wall, hyaline, cylindrical, branched at the base and above, septate, smooth-walled. Conidiogenous cells hyaline, enteroblastic, phialidic, subcylindrical to lageniform or irregular, integrated or discrete, determinate, smooth-walled. Conidia hyaline, cylindrical or fusiform, with obtuse apex and narrow and truncate base, septate, smooth-walled, eguttulate (adapted from Sutton 1980, Nag Raj & DiCosmo 1981).
Type species: Godronia muehlenbeckii Moug. & Lév., in Mougeot, Consid. Vég. Vosges: 355 (1846)
Notes: Groves (1965) linked Topospora uberiformis (Kunze) Fr. (type of Topospora) to the sexual morph of Godronia uberiformis on Ribes sp. (Grossulariaceae). Johnston et al. (2014b) regarded these two genera as taxonomically congruent, and recommended to use sexual morph name Godronia Moug. & Lév. for the holomorph. Konrad et al. (2007) showed that T. myrtilli grouped with G. cassandrae based on SSU sequence data, thus providing more evidence of connection between Topospora and Godronia. However, the type species of Topospora has not been linked to Godronia. To clarify the taxonomy of Godronia, the type species of both sexual and asexual morph will have to be recollected, and epitypified.
Distribution: Austria, Canada, Finland, Germany, Latvia, Netherlands, Russia, Sweden, Switzerland, UK, USA (Groves 1965, Sutton 1980, Konrad et al. 2007).
References:
Li WJ, McKenZie EHC, Liu JK, Bhat DJ, Dai DQ, Caporesi E, Tian Q, Maharachcikumbura SSN, Luo ZL, Shang QJ, Zhang JF, Tangthirasunun N, Karunarathna SC, Xu JC, Hyde KD (2020) Taxonomy and phylogeny of hyaline-spored coelomycetes. Fungal Diversity 100: pages279–801.
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