Fungalpedia – Note 692, Pleiostomellina
Pleiostomellina Bat., J.L. Bezerra & H. Maia.
Citation when using this data: D. S. Marasinghe et al. 2023 (in prep.) – Fungalpedia, Ascomycota.
Index Fungorum, Facesoffungi, MycoBank, GenBank.
Classification: Incertae sedis, Incertae sedis, Incertae sedis, Dothideomycetes, Pezizomycotina, Ascomycota, Fungi
Epiphytic on leaves. Sexual morph: Ascostromata superfi- cial to semi-immersed, flattened, dark brown to black, carbonaceous, multi-loculate. Locules globose to subglobose, radially arranged covering the central ostiole. Upper wall composed of radially arranged brown cells of textura prismatica. Peridium of locules comprising one layer of thin-walled, heavily pigmented, small, dark brown to black cells of textura angularis. Hamathecium lacking pseudoparaphyses. 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, 2-celled, unequally 1-septum, constricted at the septum, verrucose. Asexual morph: Undetermined (Ariyawansa et al. 2014).
Notes: Batista and Bezerra (1964) introduced Pleiostomel- lina based on superficial, carbonaceous, ascomata with radi- ally arranged multi-locules, appedicellate cylindrical asci and ellipsoidal, 2-celled, verrucose ascospores. Ariyawansa et al. (2014) placed Pleiostomellina in Parmulariaceae based on similar characters with Parmularia. Pleiostomellina is similar to Parmularia in having orbicular, multiloculate, carbonaceous ascostromata, with 2-celled, verrucose ascospores (Ariyawansa et al. 2014). However, Pleiostomellina differs from Parmularia by apedicellate asci, lacking pseudoparaphyses and verrucose reddish brown, unequally septate ascospores.
Type species: Pleiostomellina pernambucensis Bat., J.L.Bezerra & Cavalc., in Batista & Bezerra, Portug. acta biol., Sér. B 7(4): 374 (1964)
Other accepted species: species Fungorum – search Pleiostomellina.
References
Batista AC, Bezerra JL 1964 – Polystomellaceae: novas entidades Bra- sileiras. Portugaliae Acta Biologica 7:361–382.
Entry by
Diana Sandamali Marasinghe, Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai, 57100, Thailand School of Science, Mae Fah Luang University, Chiang Rai, 57100, Thailand, Mushroom Research Foundation, 128 M.3 Ban Pa Deng T. Pa Pae, A. Mae Taeng, Chiang Mai, 50150, Thailand
Published online 29 August 2023