Pleosporales » Phaeosphaeriaceae

Paraloratospora

Paraloratospora Bundhun, Tennakoon, Phookamsak & K.D. Hyde, in Hyde et al., Fungal Diversity 100: 101 (2020).

Index Fungorum number: IF 557115; Facesoffungi number: FoF 07195, 2 morphological species (Species Fungorum 2022), 2 species with molecular data.

Associated with living branches or leaves. Sexual morph: Ascomata solitary, scattered to aggregated, immersed to erumpent through host surface, noticeable as small black spots, uniloculate, globose to subglobose, dark brown, glabrous, centrally ostiolate, with minute papilla, filled with hyaline periphyses. Peridium of unequal thickness, thicker near the apex and thinner at the sides towards the base, comprising 4–7 layers of dark brown, thick-walled pseudoparenchymatous cells of textura angularis, paler towards the inner layers. Hamathecium composed of dense, filamentous, septate pseudoparaphyses, slightly constricted at the septa, anastomosing above the asci, embedded in gelatinous matrix. Asci 8-spored, bitunicate, fissitunicate, cylindrical to subcylindric, sessile to subsessile, apex rounded, thick-walled, with a small ocular chamber. Ascospores overlapping 1–2-seriate, hyaline to light brown, or light yellowish, fusiform to ellipsoidal, with rounded ends, septate, the second cell from the apex swollen, smooth-walled, with or without a mucilaginous sheath. Asexual morph: Unknown (adapted from Hyde et al. 2020).

Type species: Paraloratospora camporesii Bundhun, Jeewon & K.D. Hyde

Notes: Paraloratospora is characterised by solitary, scattered to aggregated, immersed to erumpent ascomata, fissitunicate, cylindrical to sub cylindric, sessile to subsessile asci and overlapping 1–2-seriate, hyaline to light brown ascospores with or without a mucilaginous sheath. In the phylogenetic analysis of Hyde et al. (2020) based on LSU, SSU, ITS and TEF-1 sequence data, Paraloratospora clustered close to Wingfeldomyces and distant from Phaeosphaeria s. str.. Paraloratospora differs from Wingfeldomyces in having hyaline to light brown, fusiform to ellipsoidal, 3–4-septate, smooth walled ascospores, with the second cell from the apex is swollen and surrounded by a mucilaginous sheath, while Wingfeldomyces has elongate fusoid, finely verruculose, red-brown, 2-septate ascospores and central cell slightly swollen (Marin-Felix et al. 2019). Paraloratospora differs from Loratospora in that the latter has ovoid or ampulliform asci, with pale yellowish, elongate fusiform ascospores. Paraloratospora is morphologically and phylogenetically a distinct and well-defined genus in Phaeosphaeriaceae. Molecular markers available for Paraloratospora are ITS, LSU, SSU and TEF-1.

 

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