Pleosporales » Lophiostomataceae

Biappendiculispora

Biappendiculispora Thambug., Kaz. Tanaka & K.D. Hyde, in Thambugala et al., Fungal Diversity: 10.1007/s13225-015-0348-3, [16] (2015).

Index Fungorum number: IF 551528; Facesoffungi number: FoF 01096, 1 morphological species (Species Fungorum 2022), 1 species with molecular data.

Saprobic on dead herbaceous stems or culms of Poaceae spp. Sexual morph: Ascomata solitary, immersed, papilla erumpent through host surface, coriaceous, reddish brown to black, subglobose, ostiolate. Ostiole rounded or slit-like, variable in shape, central, papillate, with a pore-like opening, plugged by gelatinous tissue, made up of hyaline, pseudoparenchymatous cells and occasionally lighter coloured. Peridium wider at the apex and thinner at the base, composed of a single stratum, with several layers of lightly pigmented to reddish brown, cells of textura angularis, cells towards the inside lighter, at the outside, darker, fusing and indistinguishable from the host tissues. Hamathecium comprising numerous, 2–3 μm wide, branched, septate, cellular, pseudoparaphyses, situated between and above the asci, embedded in a gelatinous matrix. Asci 8-spored, bitunicate, fissitunicate, cylindric-clavate, with short, bulbous pedicel, rounded at the apex, with an ocular chamber. Ascospores overlapping uni to bi-seriate, fusiform with acute ends, 7–9-septate, constricted at the septa, cell above central septum widest, becoming pale yellowish to brown at maturity, with appendages at both ends. Asexual morph: Unknown (adapted from Thambugala et al. 2015).

 

Type species: Biappendiculispora japonica Thambug., Wanas., Kaz. Tanaka & K.D. Hyde

 

Notes: Biappendiculispora is characterised by solitary, immersed ascomata, fissitunicate, cylindric-clavate asci and pale yellowish to brown ascospores. Biappendiculispora resembles Lophiostoma in having fusiform, pale yellowish to brown ascospores with narrow, acute ends but can be differentiated in that the latter has peridium with cells of textura prismatica and normally 7-septate ascospores. Biappendiculispora is also comparable to Pseudolophiostoma in that the latter has ascomatal wall comprised of textura prismatica and hyaline, broad fusiform, uniseptate ascospores surrounded by a mucilaginous sheath and absence of terminal appendages while the former has peridium composed of a single stratum of textura angularis, 7–9-septate ascospores with appendages at both ends. Biappendiculispora is a distinct and well-defined genus in Lophiostomataceae. Molecular markers available for Biappendiculispora are ITS, SSU and TEF-1.

 

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