Rubroshiraia
Rubroshiraia D.Q. Dai & K.D. Hyde, in Dai et al., MycoKeys 58: 14 (2019).
Index Fungorum number: IF 556564; Facesoffungi number: FoF 06204, 1 morphological species (Species Fungorum 2022), 1 species with molecular data.
Parasitic on living branches of bamboo. Sexual morph: Ascostromata solitary, superficial, globose to subglobose, fleshy, reddish, with locules lining the periphery, with dark ostiolate tips appearing on surface. Ascostromatic tissue thick, pinkish, composed of wider woven hyphae of textura intricata. Locules globose to subglobose, immersed in the peripheral layer of ascostromata, with narrow ostiolate openings. Peridium composed of several layers of hyaline to dark brown, small cells of textura angularis to textura intricata. Hamathecium of interthecial, hyaline, septate, branched pseudoparaphyses above asci. Asci 8-spored, thick-walled, bitunicate, fissitunicate, cylindrical, short-pedicellate, with an ocular chamber. Ascospores spirally arranged in asci, filiform, hyaline, with transverse septa, smooth-walled. Asexual morph: Unknown (adapted from Dai et al. 2019).
Type species: Rubroshiraia bambusae D.Q. Dai & K.D. Hyde
Notes: Rubroshiraia is characterised by superficial, globose to subglobose, fleshy, reddish ascostromata, globose to subglobose locules, peridium comprising cells of textura angularis to textura intricata, cylindrical asci and filiform, hyaline ascospores. Rubroshiraia resembles Shiraia in having darker reddish ascostromata and a parasitic lifestyle on bamboo (Dai et al. 2019). Rubroshiraia differs from Shiraia in having smaller and darker ascostromata and filiform ascospores spirally arranged in asci. Rubroshiraia is morphologically and phylogenetically a distinct genus in Shiraiaceae. Molecular markers available for Rubroshiraia are ITS, LSU, SSU, RPB2 and TEF-1.
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