Pleosporales » Melanommataceae

Uzbekistanica

Uzbekistanica Wanas., Gafforov & K.D. Hyde, in Wanasinghe et al., Fungal Diversity: 10.1007/s13225-018-0395-7, [100] (2018).

 Index Fungorum number: IF 554166; Facesoffungi number: FoF 04008, 4 morphological species (Species Fungorum 2022), 4 species with molecular data.

Saprobic in terrestrial habitats. Sexual morph: Ascomata superficial, solitary, scattered, broadly oblong and flattened, dark brown to black, coriaceous, ostiolate. Ostiole papillate, black, smooth, ostiolar canal filled with brown to hyaline cells. Peridium outer layer heavily pigmented, thick-walled, comprising reddish to dark brown cells of textura angularis, inner layer composed of hyaline thick-walled cells of textura angularis. Hamathecium comprising numerous, filamentous, branched, septate, pseudoparaphyses. Asci 8-spored, bitunicate, fissitunicate, cylindrical to cylindric-clavate, pedicellate, thick-walled at the apex, with minute ocular chamber. Ascospores overlapping uni- to biseriate, muriform, ellipsoidal, mostly symmetrical, upper part wider than the lower part, initially hyaline, becoming yellowish-brown to brown at maturity, with narrowly rounded ends, surrounded by a thick mucilaginous sheath. Asexual morph: Conidiomata pycnidial, stromatic, mostly solitary, semi-immersed to immersed in the host, globose, dark brown to black, ostiolate, apapillate. Peridium outer layer comprising 3–4 layers, heavily pigmented, thick-walled, comprising blackish to dark brown, angular cells, inner layer comprising 2–3 layers, hyaline or lightly pigmented, thick-walled, angular cells. Conidiogenous cells holoblastic, cylindrical to subcylindrical, hyaline, the first conidium produced holoblastically and subsequent conidia enteroblastically, forming typical phialides with periclinal thickenings, swollen at the base, discrete, producing a single conidium at the apex. Conidia initially hyaline, unicellular, becoming dark brown anduniseptate, while still attached to conidiogenous cells; detached conidia, hyaline, sepia or brown, unicellular oruniseptate, moderately thick-walled, wall externally smooth, roughened on the inner surface, oval to ovoid, widest in the center, apex obtuse, base rounded, sometimes guttulate when young (adapted from Wanasinghe et al. 2018).

Type species: Uzbekistanica rosae-hissaricae Wanas., Gafforov & K.D. Hyde

Notes: Uzbekistanica is characterised by broadly oblong ascomata, septate pseudoparaphyses, cylindrical to cylindric-clavate asci, and muriform, ellipsoidal, yellowish brown to brown ascospores. The asexual morph is coelomycetous. Uzbekistanica is a well-supported and distinct genus in Melanommataceae. Molecular markers available for Uzbekistanica include LSU, SSU, ITS, RPB2 and TEF-1.

 

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