Lecanosticta
Lecanosticta Syd., in Sydow & Petrak, Annls mycol. 20(3/4): 211 (1922).
Index Fungorum number: IF 8720; Facesoffungi number: FoF 08508, 10 morphological species (Species Fungorum 2022), 9 species with molecular data.
Associated with leaf spot. Sexual morph: Unknown. Asexual morph: Mycelium immersed, branched, septate, pale brown. Conidiomata acervular, subepidermal, separate, formed of brown, thin- or thick-walled textura angularis. Dehiscence by pushing back a flap of epidermis that remains attached. Conidiophores hyaline to pale brown, branched, septate, smooth, formed from the upper cells of the pseudoparenchyma. Conidiogenous cells holoblastic, integrated or discrete, indeterminate, cylindrical, hyaline, with 1–2 often widely spaced percurrent proliferations. Conidia acrogenous, straight or curved, fusiform, tapered to the rounded apex and truncate base, l–3-euseptate, continuous, pale brown, verrucose (adapted from Sutton 1980; Videira et al. 2017).
Type species: Lecanosticta pini Syd.
Notes: Lecanosticta is characterised by acervular, subepidermal, separate conidiomata, holoblastic, integrated or discrete conidiogenous cells, and acrogenous, straight or curved, fusiform, l–3-euseptate conidia. Lecanosticta resembles Phaeophleospora in having acrogenous, straight or curved, fusiform l–3-euseptate, pale brown conidia, but forms acervular conidiomata instead of pycnidial conidiomata. Lecanosticta is morphologically and phylogenetically a distinct genus in Mycosphaerellaceae. Molecular markers available for Lecanosticta are LSU, SSU, ITS, BTUB, RPB2 and TEF-1.
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