Parmulariales » Parmulariaceae

Pleiostomellina

Pleiostomellina Bat., J.L. Bezerra & H. Maia, in Batista & Bezerra, Portug. acta biol., Sér. B 7(4): 373 (1964).

Index Fungorum number: IF 4204; Facesoffungi number: FoF 08120, 1 morphological species (Species Fungorum 2022), no molecular data available.

Saprobic on leaves. Sexual morph: Ascostromata solitary to gregarious, superficial to semi-immersed, dark brown to black, carbonaceous, flattened, with numerous locules in a circle, cells of ascostromata comprising brown-walled cells of textura angularis. Locules globose to subglobose, with individual central ostioles. Peridium of locules comprising one layer of thin-walled, heavily pigmented, small, dark brown to black cells of textura angularis. Pseudoparaphyses absent. Asci 8-spored, bitunicate, fissitunicate, cylindrical, thick-walled, without a pedicel and with a distinct ocular chamber. Ascospores 2–3-seriate, ellipsoidal, with rounded ends, hyaline when immature and dark brown to reddish brown at maturity, uniseptate, constricted at the septum, verrucose. Asexual morph: unknown (adapted from Ariyawansa et al. 2014).

Type species: Pleiostomellina pernambucensis Bat., J.L. Bezerra & Cavalc., in Batista & Bezerra

Notes: Pleiostomellina is characterised by solitary to gregarious, superficial to semi-immersed ascostromata, globose to subglobose locules, cylindrical, thick-walled asci and 2–3-seriate, ellipsoidal, uniseptate ascospores. Pleiostomellina resembles members of Parmulariaceae in having solitary to gregarious, carbonaceous ascomata with multi-locules, fissitunicate, cylindrical asci and dark brown to reddish brown, uniseptate, verrucose ascospores. Pleiostomellina differs from other genera of Parmulariaceae in having thick-walled, bitunicate asci lacking a pedicel, absence of pseudoparaphyses and 2–3-seriate ascospores with verrucose spore walls (Hyde et al. 2013). Ariyawansa et al. (2014) re-studied the holotype specimen from URM and referred Pleiostomellina to Parmulariaceae based on morphological resemblance to Parmularia. Molecular data is lacking. Pleiostomellina needs to be re-collected and epitypified to confirm its taxonomic placement.

 

 

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