Aldonata
Aldonata Sivan. & A.R.P. Sinha, Mycol. Res. 92(2): 248 (1989).
Index Fungorum number: IF 25242; Facesoffungi number: FoF 00311, 1 morphological species (Species Fungorum 2020), no molecular data available.
Parasitic on leaf spots on the upper leaf surface. Spots solitary, scattered, variable in shape, circular to irregular, greyish-white, edge diffuse. Sexual morph: Ascomata semi-immersed, globose to subglobose, black, shiny, appearing as flexuous lines on the leaf spot surface with a clearly-defined margin. Peridium composed of poorly-defined brown to black cells. Hamathecium transverse septate, long, colourless, branched, pseudoparaphyses. Asci 8-spored, bitunicate, clavate to broadly clavate, pedicellate, thin-walled. Ascospores multiseriate, ellipsoid to fusiform, muriform, hyaline, with up to 8 transverse and longitudinal septa, lower cell narrow and longer, caudiform. Asexual morph: Conidiomata solitary to gregarious, sub-immersed, black and shiny, carbonaceous, globose to irregular, mostly growing around the central of grayish-white spot. Peridium composed of 1 layer of thick-walled colorless cells of textura angularis. Conidiophores reduced to conidiogenous cells, arising from basal cells of inner peridium wall. Conidiogenous cells hyaline, integrated. Conidia aseptate, fusiform to cylindrical, hyaline, tapering at both ends, smooth-walled (adapted from Tian et al. 2016).
Type species: Aldonata pterocarpi Sivan. & A.R.P. Sinha
Notes: Aldonata is characterised by semi-immersed, globose to subglobose ascomata, clavate to broadly clavate, pedicellate asci and ellipsoid to fusiform, muriform, hyaline ascospores. Aldonata is presently placed in Parmulariaceae (Inácio and Cannon 2008), and resembles Aldona. However, sequence data is needed to confirm this placement.
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