Pleosporales » Lophiostomataceae

Paucispora

Paucispora Thambug., Kaz. Tanaka & K.D. Hyde, in Thambugala et al., Fungal Diversity: 10.1007/s13225-015-0348-3, [28] (2015).

 Index Fungorum number: IF 551244; Facesoffungi number: FoF 00811, 3 morphological species (Species Fungorum 2022), 3 species with molecular data.

Saprobic on dead twigs in terrestrial habitats. Sexual morph: Ascomata scattered, immersed, coriaceous, black, globose to subglobose, ostiolate. Ostiole slit-like, central, with a crest-like papilla, with an irregular, pore-like opening, plugged by hyaline, filamentous hyphae, and occasionally lightly colored. Peridium wider at the apex, and thinner at the base, composed of several layers with brown to black cells of textura angularis, cells towards the inside lighter and at the outside, darker, fusing and indistinguishable from the host tissues. Hamathecium comprising 1–2 μm wide, septate, cellular pseudoparaphyses, situated between and above the asci, embedded in a gelatinous matrix. Asci 2–4-spored, bitunicate, fissitunicate, cylindrical-clavate, with a long pedicel apically rounded with an ocular chamber. Ascospores uniseriate, partially overlapping, hyaline to reddish brown, ellipsoidal, 1–3-septate, constricted at the septum, lacking a mucilaginous sheath. Asexual morph: Unknown (adapted from Thambugala et al. 2015).

Type species: Paucispora quadrispora (K. Hiray. & Kaz. Tanaka) Thambug., Kaz. Tanaka & K.D. Hyde

Notes: Paucispora is characterised by scattered, immersed, coriaceous, black, globose to subglobose ascomata, cylindrical-clavate asci and hyaline to reddish brown, ellipsoidal, 1–3-septate ascospores lacking a mucilaginous sheath. Paucispora quadrispora previously known as Lophiostoma quadrisporum was introduced by Hirayama and Tanaka (2011) based on a wrongly identified specimen of Lophiotrema nucula (HHUF 27321; Tanaka & Harada 2003b, Thambugala et al. 2015). In the phylogenetic analysis of Hirayama et al. (2014), Lophiostoma quadrisporum clustered with another species L. versicolor in a distinct clade. Paucispora is a well-defined and distinct genus in Lophiostomataceae. Molecular markers available for Paucispora are ITS, LSU, SSU, RPB2 and TEF-1.

 

 

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