Dasysticta
Dasysticta Speg., Anal. Mus. nac. Hist. nat. B. Aires 23: 108 (1912)
Ascomycota, genera incertae sedis
Saprobic on the host plant in terrestrial habitat. Sexual morph: undetermined. Asexual morph: Conidiomata pale brown, pycnidial, solitary, superficial, amongst leaf hairs, globose, unilocular, setose. Conidiomatal setae hyaline, tapered, flexuous, septate, thick-walled. Ostiole absent. Conidiomatal wall composed of thick-walled, pale brown cells of textura angularis. Conidiophores reduced to conidiogenous cells. Conidiogenous cells hyaline, enteroblastic, phialidic, doliiform to ampulliform, determinate, smooth-walled, formed directly from the cells comprising the pycnidial wall. Conidia hyaline, cylindrical, unicellular, smooth-walled, often with a large central guttule (Sutton 1980).
Type species: Dasysticta sapindophila Speg., Anal. Mus. nac. Hist. nat. B. Aires 23: 108 (1912)
Notes: Dasysticta sapindophila was collected on leaves of Serjania caracasana (Sapindaceae) in Argentina. The genus remains monotypic, and there is no molecular data available. Dasysticta can be confused with Chaetasbolisia, as they have pycnidial, globose, unilocular, setose conidiomata, phialidic, doliiform to ampulliform conidiogenous cells and hyaline, unicellular conidia. Dasysticta was separated from Chaetasbolisia by its hyaline, tapered, flexuous conidiomatal setae up to 650 µm long, and cylindrical conidia (Sutton 1980). Dasysticta has brown, subulate conidiomatal setae up to 60 µm long, and oval conidia.
Distribution: Argentina.
Dasysticta sapindophila (redrawn from Sutton 1980) a, b, c Conidiogenous cells and condia. d Surface view of conidioma with setae.
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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