Pleosporales » Astrosphaeriellaceae

Aquatospora

Aquatospora W. Dong, H. Zhang & K.D. Hyde, in Dong et al., Fungal Diversity: 10.1007/s13225-020-00463-5, [55] (2020).

Index Fungorum number: IF 557903; Facesoffungi number: FoF 09245, 1 morphological species (Species Fungorum 2022), no molecular data available.

Saprobic on decaying wood submerged in freshwater. Sexual morph: Ascomata black, scattered or gregarious, superficial, hemisphaerical to conical, base flattened, carbonaceous, with ostiolate papilla. Ostiole central, relatively broad, circular, black. Peridium uneven in width, carbonized, composed of black amorphous layer, whose cells are obscured. Pseudoparaphyses numerous, trabeculate, filiform, hyaline, sparsely septate. Asci 8-spored, bitunicate, clavate to narrowly ellipsoidal, with a short pedicel, apically rounded. Ascospores 2–4-seriate, hyaline, septate, subcylindrical, thin-walled, smooth. Asexual morph: Unknown (adapted from Dong et al. 2020).

Type species: Aquatospora cylindrica W. Dong, H. Zhang & K.D. Hyde

Notes: Aquatospora is characterised by black, scattered or gregarious, superficial ascomata, relatively broad, circular, black ostiole, trabeculate, filiform, hyaline pseudoparaphyses, clavate to narrowly ellipsoidal asci and hyaline, septate, subcylindrical, thin-walled, smooth ascospores. In the phylogenetic analysis of Dong et al. (2020) based on LSU, ITS, TEF and RPB2, Aquatospora clustered close to Xenoastrosphaeriella with low statistical support. Aquatospora differs from Xenoastrosphaeriella in that the latter has pale end cells of ascospores (Jayasiri et al. 2019, Dong et al. 2020). Aquatospora resembles members of Astrosphaeriellaceae in having large, erumpent to superficial, hemispherical or conical, carbonaceous ascomata with flattened bases (Phookamsak et al. 2015, Dong et al. 2020). Aquatospora differs from species of Astrosphaeriellaceae in having clavate to narrowly ellipsoidal asci, hyaline, cylindrical ascospores. Aquatospora is morphologically and phylogenetically a distinct genus in Astrosphaeriellaceae. Molecular markers available for Aquatospora include LSU, SSU, ITS, TEF-1 and RPB2.

 

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