Myriangiales » Myriangiaceae

Mendogia

Mendogia Racib., Parasit. Alg. Pilze Java's (Jakarta) 3: 31 (1900).

Index Fungorum number: IF 3119; Facesoffungi number: FoF 01951, 8 morphological species (Species Fungorum 2022), 2 species with molecular data.

Epiphytic on living bamboo culms or palms. Sexual morph: Ascostromata small to large, solitary to gregarious, superficial, round to irregular, black, carbonaceous, flattened, with central area slightly raised, and peripheral wall of stromata cracking, pseudoparenchymatous tissue and asci growing under stroma, revealing the dark brown inner issue, with irregular edge, rugose to rugulose at the surface, loculate, easily removable from the host, with asci separated by paraphysoid-like filaments or pseudoparenchymatous cells. Wall of ascostromata consisting of two layers, outer layer composed of black, thin carbonaceous tissue, easily breaking; inner layer composed of large, hyaline to pale brown to dark brown pseudoparenchymatous cells of textura angularis. Hamathecium with asci or paraphysoid-like filaments. Asci 8-spored, thick-walled, bitunicate, fissitunicate, subglobose to clavate, or cylindrical, with rounded pedicel, with a distinct ocular chamber. Ascospores irregularly arranged, ellipsoidal, muriform, with rounded ends, hyaline, smooth-walled. Asexual morph: Unknown (adapted from Dai et al. 2017).

 Type species: Mendogia bambusina Racib.

Notes: Mendogia is characterised by small to large, black, somewhat flattened ascostromata, and subglobose to clavate, 8-spored asci and muriform ascospores. Arx and Müller (1975) treated Mendogia in Schizothyriaceae based on morphology. The placement was followed by Hyde et al. (2013) and Wijayawardene et al. (2014). Dai et al. (2017) re-examined the type species Mendogia bambusina and introduced the new species Mendogia macrostroma, from a bamboo host. Dai et al. (2017) placed Mendogia in Myriangiaceae based on a combined analysis of SSU, LSU and TEF1 DNA sequence data. Jiang et al. (2020) added three other species namely Mendogia calami, M. chiangraiensis and M. yunnanensis. Recently, Thiyagaraja et al. (2021) added M. diffusa based on multigene analysis of ITS, LSU and SSU sequences. Mendogia is a well-defined and supported genus in Myriangiaceae.

 

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