Tubeufiales » Wiesneriomycetaceae

Parawiesneriomyces

Parawiesneriomyces Crous & M.J. Wingf., in Crous et al., Persoonia 36: 389 (2016)

Index Fungorum number: IF 817060; Facesoffungi number: FoF 06556, 1 morphological species (Species Fungorum 2021), 1 species with molecular data.

Saprobic on leaves. Sexual morph: Unknown. Asexual morph: Mycelium consisting of brown, finely verruculose, branched, septate hyphae, giving rise to hyphopodia-like structures, with several lateral branches, creating a cauliflower-like appearance. Setae loosely associated with sporodochia, erect, flexuous, base bulbous, lacking rhizoids, apex acute, thick-walled, smooth, granular, dark brown, septate. Conidiomata sporodochial, solitary, becoming somewhat gregarious in older cultures, hyaline, becoming pale luteous with age; arising from a basal stroma of loosely aggregated brown hyphae that give rise to densely aggregated, hyaline, penicillate conidiophores. Conidiophores hyaline, smooth, penicillate, septate (constricted at septa), branched, with several series of branches. Conidiogenous cells terminal, clavate, hyaline, smooth, straight to gently curved, polyblastic, with several flat-tipped apical loci. Conidia solitary, aggregated in mucoid mass, hyaline, smooth, granular, prominently guttulate, sub cylindrical, widest in middle with taper towards both ends that are obtusely rounded, septate, prominently constricted at septa, joined by a narrow isthmus (Adapted from Crous et al. 2016).

 

            Type species: Parawiesneriomyces syzygii Crous & M.J. Wingf.

 

Notes: Parawiesneriomyces was introduced by Crous and Wingf. (2016) with P. syzygii as type species. Parawiesneriomyces closely resembles Wiesneriomyces, but is different in that the sporodochia are not elevated by a dark pseudoparenchymatous stalk, but arise flat on the agar surface, and the setae are not directly connected to the sporodochia, but also form in the absence of sporodochia. Phylogenetically, Parawiesneriomyces is a distinct and well-supported genus in Wiesneriomycetaceae. More taxa and sequence data are needed to confirm the validity of Parawiesneriomyces in Wiesneriomycetaceae.

 

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