Fungalpedia – Note 737, Endomeliola
Endomeliola. S. Hughes & Piroz.
Citation when using this data: D. S. Marasinghe et al. 2023 (in prep.) – Fungalpedia, Ascomycota.
Index Fungorum, Facesoffungi, MycoBank, GenBank.
Classification: Meliolaceae, Meliolales, Meliolomycetidae, Sordariomycetes, Pezizomycotina, Ascomycota, Fungi
Epiphytic or pathogenic on leaves, developing on reddishbrown necrotic areas. Intercellular hyphae branched, septate, cylindrical, smooth, brown to pale brown, irregular, extending into the mesophyll, also penetrating between cells of the 2-layered palisade, with a single terminal hyphopodium. Hyphopodia irregular, mostly ellipsoidal to subglobose to ovoid to obovoid, occasionally angular or lobed in the mesophyll, generally with a short stalk cell, with a hyaline pore at the centre of the head cell. Sexual morph: Stromata superficial, solitary or gregarious, loculate, often discrete and then subglobose, somewhat flattened with a constricted base seated on the stromatic crust, black, com- prising dark brown cells of textura angularis in transverse section, surface verrucose, with raised conical protuberant or ampuliform cells. Peridium comprising dark brown cells of textura angularis in transverse section, two strata, outer stratum of thick-walled, dark brown to reddish cells of textura angularis, and inner stratum of hyaline flattened cells. Ascomatal locules 1–4-locules in a pulvinate stroma, with central ostioles lined with periphyses. Hamathecium with hyaline, cellular, aseptate paraphyses. Asci 4-spored, unitunicate, ellipsoidal to clavate, evanescent. Ascospores 2–3-seriate, initially hyaline becoming brown to dark brown at maturity, broadly ellipsoidal to subcylindrical, 4-septate, slightly constricted and darker at the septa, middle cell wider than other cells, smooth-walled. Asexual morph: Phialides solitary or gregarious on superficial ascostromata, occasionally on ascomatal walls, ampuliform or flask-shaped, brown to dark brown. Conidia ellipsoidal, hyaline (Hughes and Pirozynski 1994; Hongsanan et al. 2015a).
Notes: Hughes and Pirozynski (1994) introduced Endomeliola with the type species
E. dingleyae. This monotypic genus is characterized in having an ascoma with locules, hyaline, cellular, aseptate paraphyses, 4-spored asci and 4-septate brown ascospores (Hughes and Pirozynski 1994; Hongsanan et al. 2015a). The characters of ascomata and paraphyses and the formation of stomatopodia differ from other genera in Meliolaceae, however, 4-spored evanescent asci and 4-septate brown ascospores resemble as a member of Meliolales. However, the molecular data of Endomeliola is not enough to clarify its correct placement in Meliolales.
Type species: Endomeliola dingleyae S. Hughes & Piroz., N.Z. Jl Bot. 32(1): 54 (1994)
Other accepted species: Species Fungorum – search Endomeliola.
References
Hongsanan S, Tian Q, Peršoh D, Zeng XY et al 2015a – Meliolales. Fungal Divers 74(1):91–141.
Hughes SJ, Pirozynski KA 1994 – Endomeliola dingleyae, a new genus and new species of Meliolaceae. NZ J Bot 32:53–59.
Entry by
Diana Sandamali Marasinghe, Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai, 57100, Thailand School of Science, Mae Fah Luang University, Chiang Rai, 57100, Thailand, Mushroom Research Foundation, 128 M.3 Ban Pa Deng T. Pa Pae, A. Mae Taeng, Chiang Mai, 50150, Thailand
Published online 29 August 2023