Amerosporiopsis
Amerosporiopsis Petr., Bot. Arch. 43: 84 (1941)
Ascomycota, genera incertae sedis
Saprobic on dead leaves of Sesleria sp. (Poaceae). Sexual morph: undetermined. Asexual morph: Conidiomata greenish black, pycnidial, solitary, immersed, globose, unilocular, glabrous, ostiolate. Ostiole single, circular, depressed, centrally located. Conidiomatal wall composed of dark brown, thick-walled cells of textura angularis in the upper part, becoming pale brown, thinner-walled at the base. Conidiophores arising from the innermost layers of conidiomata, reduced to conidiogenous cells. Conidiogenous cells hyaline, enteroblastic, phialidic, cylindrical, determinate, smooth-walled. Conidia hyaline, unicellular, fusiform to limoniform, with acute apex and protuberant or slightly truncate base, smooth-walled, guttulate (Sutton 1980).
Type species: Amerosporiopsis gaubae Petr., Bot. Arch. 43: 84 (1941)
Notes: This genus has remained monotypic, and no molecular data is available. Amerosporiopsis shares similar morphology of conidia with Disculoides Crous et al. (Crous et al. 2012a). The latter has olivaceous conidia and annellidic conidiogenous cells, which differ from the hyaline conidia and phialidic conidiogenous cells in Amerosporiopsis. To clarify the taxonomy of Amerosporiopsis, the type species will have to be recollected and epitypified.
Distribution: Iran (Sutton 1980).
Amerosporiopsis gaubae (redrawn from Sutton 1980) a Conidia. b Conidiogenous cells and developing conidia. c Vertical section of conidioma.
Reference:
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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