Sulcispora
Sulcispora Shoemaker & C.E. Babc., Can. J. Bot. 67(5): 1594 (1989).
Index Fungorum number: IF 39796; Facesoffungi number: FoF 00444, 2 morphological species (Species Fungorum 2022), 2 species with molecular data.
Saprobic on leaves of Anthoxanthum odoratum L. visible as black spots, occurring on the upper surface of entire leaf. Sexual morph. Ascomata scattered, solitary, immersed, uniloculate, globose, black. Ostiole papillate, central, periphysate. Periphyses hyaline. Peridium comprising 2–4 layers of brown to dark brown, thick-walled, cells of textura angularis to textura globularis. Hamathecium comprising 2–4 µm wide, cellular, hyaline, branched, septate, pseudoparaphyses, constricted at the septa, anastomosing mostly above the asci and embedded in a mucilaginous matrix. Asci 8-spored, few, bitunicate, fissitunicate, subglobose to clavate, short pedicellate, apically rounded, with an ocular chamber, arising from the base of the ascoma and attached to parenchymatous cell matrix at base. Ascospores bi-seriate to tri-seriate, narrowly fusiform, narrowing towards the end cells, reddish to dark brown, 6-septate, second septum supra-median, slightly constricted, not constricted at other septa, second segment swollen, straight, with 12–16 longitudinal furrows on surface, lacking a mucilaginous sheath. Asexual morph: Unknown (adapted from Senanayake et al. 2018).
Type species: Sulcispora pleurospora (Niessl) Shoemaker & C.E. Babc.
Notes: Sulcispora is characterised by scattered, solitary, immersed, uniloculate ascomata, subglobose to clavate, short pedicellate asci, and bi-seriate to tri-seriate, narrowly fusiform, reddish to dark brown, 6-septate ascospores. Sulcispora pleurospora was previously known as Leptosphaeria pleurospora but was not congeneric with the type species of Leptosphaeria. Sulcispora is unique in having several lines on the ascospore wall (Shoemaker & Babcock 1989, Senanayake et al. 2018). A combined dataset of ITS, LSU, SSU and TEF-1 sequences is ideal to introduce new species of Sulcispora. Sulcispora is morphologically and phylogenetically a distinct genus in Phaeosphaeriaceae. Molecular markers available for Sulcispora are ITS, LSU, SSU and TEF-1.
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