Microthyriales » Microthyriaceae

Tumidispora

Tumidispora Hongsanan & K.D. Hyde, in Ariyawansa et al., Fungal Diversity: 10.1007/s13225-015-0346-5, [69] (2015).

 Index Fungorum number: IF 551375; Facesoffungi number: FoF 00944, 1 morphological species (Species Fungorum 2022), 1 species with molecular data.

Epiphytic on the upper surface of leaves, appearing as small black dots. Superficial hyphae absent. Sexual morph: Thyriothecia superficial, mostly solitary, light brown to brown, circular, flattened, basal peridium poorly developed, easily removed, darker around the central ostiole, dark brown towards the outer lighter rim, irregularly rounded at the margin. Upper wall comprising brown cells of textura angularis, radiating in slightly irregular, but parallel lines from center to the outer rim. Hamathecium comprising 2 μm wide, branched pseudoparaphyses, asci inclined towards the central ostiole. Asci 8-spored, bitunicate, fissitunicate, cylindrical to cylindric-clavate, short pedicellate, apically rounded, with an ocular chamber. Ascospores 1–2-seriate, hyaline, narrowly fusiform with subpapillate ends, uniseptate, apical cell swollen and wider and subpapillate, basal cell subconical. Asexual morph: Unknown (adapted from Ariyawansa et al. 2015).

Type species: Tumidispora shoreae Hongsanan & K.D. Hyde

Notes: Tumidispora is similar to genera in Microthyriaceae in having superficial thyriothecia, with a central ostiole and hyaline, uniseptate ascospores. Tumidispora mostly resembles Paramicrothyrium but differs in having a conspicuous darkened area around the central ostiole and also in the shape of the ascospores (Ariyawansa et al. 2015). Tumidispora is a distinct and well-supported genus in Microthyriaceae. Molecular markers available for Tumidispora are LSU and SSU.

 

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