Pisorisporiales » Pisorisporiaceae


Pisorisporium Réblová & J. Fourn., Persoonia 34: 45 (2015)

Pisorisporiomycetidae, Pisorisporiales, Pisorisporiaceae, Pisorisporium

Index Fungorum number: IF810340; Facesoffungi number: FoF 01287; 2 morphological species; 1 species with sequence data.


Saprobic on decaying wood in freshwater habitat. Sexual morph: Ascomata astromatic, perithecial, solitary to aggregated, immersed to superficial, papillate or comprising a short beak, glabrous, flattened at the basal or lateral side, upright or obliquely or horizontally lying. Ostiole periphysate. Peridium soft-textured, leathery to fragile, two-layered, outer layer relatively carbonaceous, inner layer comprising hyaline elongated cells. Paraphyses abundant, persistent, septate, cylindrical, hyaline, sparingly branched, tapering, originating from the bottom and sides in the ascomata,. Asci 8-spored, unitunicate, cylindrical-clavate, with a short pedicel, bearing a distinct thimble-shaped J+ apical ring. Ascospores 2- to 3-seriate, fusiform, cylindrical to cymbiform, at times falcate, hyaline, comprising several transverse septa, smooth-walled, guttulate, without appendages or mucilaginous sheath. Asexual morph: Undetermined (adapted from Réblová et al. 2015a).


Type species: Pisorisporium cymbiforme Réblová & J. Fourn., in Reblova, Fournier & Stepanek, Persoonia 34: 45 (2014)


Notes: The genus was introduced to accommodate taxa isolated from decaying wood submerged in freshwater and is characterized by brown to black astromatic ascomata and a J+, apical ring in the asci. The ascospores of Pisorisporium cymbiforme are slightly constricted at the septa and have thick walls (Réblová et al. 2015a). Interestingly, the apical annulus of Pisorisporium is easily stained with chemicals such as Congo red, toluidine blue or blue ink as compared to the amyloid apical apparatus of other genera in Sordariomycetes. This observation led to the conclusion that the chemical components present in the apical annulus of Pisorisporium potentially differ from the compounds making the amyloid apical apparatus of other Sordariomycetes genera (Réblová et al. 2015a).




About Sordariomycetes

The webpage Sordariomycetes provides an up-to-date classification and account of all genera of the class Sordariomycetes.


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