Leptosporella
Leptosporella Penz. & Sacc., Malpighia 11(9-10): 406 (1897)
Sordariomycetidae, Chaetosphaeriales, Leptosporellaceae, Leptosporella
Index Fungorum number: IF2804; Facesoffungi number: FoF 06191; 11 morphological species (Species Fungorum 2020), 4 species and 2 unnamed species with sequence data.
Saprobic or endophytic on various host plants. Sexual morph: Ascomata solitary, superficial, comprising black, subglobose, carbonaceous, dome-shaped, raised, blister-like areas, within the plant tissues, flattened at the base, ostiole central. Peridium outer cells merging with the host epidermal cells, composed of dark brown to black cells of textura angularis. Paraphyses numerous, hyaline, hypha-like, septate, longer than asci. Asci 8-spored, unitunicate, cylindrical, long-pedicellate, with a J-, wedge-shaped, subapical ring. Ascospores fasciculate, hyaline or pale-yellowish in mass, spiral, filiform, straight or curved, aseptate, ends rounded, with or without polar mucilaginous appendages. Asexual morph: Undetermined (adapted from Konta et al. 2017).
Type species: Leptosporella gregaria Penz. & Sacc., Malpighia 11(9-10): 407 (1897)
Notes: A phylogenetic tree for this genus was provided in Konta et al. (2017). The genus is characterised by solitary, superficial, carbonaceous, dome-shaped ascomata, with a central ostiole, cylindrical asci with a J-, subapical ring and spiral, filiform, hyaline (pale-yellowish in mass), aseptate ascospores, with or without polar mucilaginous appendages (Konta et al. 2017). The asexual morph and appressoria have not been reported. Leptosporella arengae is illustrated for this genus with updated the information of an appressoria-like structure that was produced at the hyphal tip when ascospores were germinated. Appressoria were 4–5 μm high × 4–5 μm diameter (x̅ = 5 μm, n = 5), rare, globose to subglobose, irregular, and hyaline. A new species, Leptosporella elaeidis is introduced herein.
Species:
Leptosporella elaeidis Konta & K.D. Hyde
Leptosporella arengae S. Konta & K.D. Hyde
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