Fungalpedia – Note 607, Platypeltella
Platypeltella Petr.
Citation when using this data: D. S. Marasinghe et al. 2023 (in prep.) – Fungalpedia, Ascomycota.
Index Fungorum, Facesoffungi, MycoBank, GenBank.
Classification: Microthyriaceae, Microthyriales, Incertae sedis, Dothideomycetes, Pezizomycotina, Ascomycota, Fungi
Epiphytic on the upper surface of leaves. Superficial mycelium with dark brown to light brown, septate with intercalary appressoria. Sexual morph: Thyriothecia superficial, scattered to gregarious, dimidiate, flattened, orbicular, coriaceous, opening by central pore. Upper wall comprising radially arranged cells from the central opening to the periphery with poorly developed basal cell layer, fimbriate at the margin. Hamathecium composing of subhyaline, filiform pseudoparaphyses. Asci 8-spored, 1–3-seriate, bitunicate, clavate to cylindrical, narrowly ellipsoidal or fusoid, straight or slightly curved, apedicellate. Ascospores hyaline to light brown, usually 2-celled, apiosporous, ellipsoidal to elongate-ovoid, smooth-walled. Asexual morph: Undetermined (Sydow and Petrak 1929; Wu et al. 2014).
Notes: Platypeltella was introduced by Sydow and Petrak (1929) and placed in Microthyriaceae based on the scutellum which has the strictly radiate hyphal arrangement (Farr 1982). Wu et al. (2014) studied the herbarium specimen of P. smilacis and transferred it to Asterinaceae. Platypeltella is morphologically similar to Asterina in having circular, superficial thyriothecia with appressorial hyphae. However, it differs from Asterina i having ostiolate thyriothecia, clavate to cylindrical asci with ellipsoidal hyaline ascospores.
Type species: Platypeltella smilacis Petr., Annls mycol. 27(1/2): 62 (1929).
Other accepted species: Species Fungorum – search Platypeltella.
References
Farr ML 1982 – A third species of Platypeltella (Microthyriaceae). Mycotaxon 15:448–452.
Sydow H, Petrak F 1929 – Fungi costaricensis a cl. Prof Alberto M. Brenes Collecti. Ann Mycologici 27:1–86.
Wu HX, Tian Q, Li WJ et al 2014 – A reappraisal of Microthyriaceae. Phytotaxa 176:201–212.
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