Fungalpedia – Note 694, Polycyclus
Polycyclus Höhn.
Citation when using this data: D. S. Marasinghe et al. 2023 (in prep.) – Fungalpedia, Ascomycota.
Index Fungorum, Facesoffungi, MycoBank, GenBank., Fig. 1
Classification: Parmulariaceae, Asterinales, Dothideomycetidae, Dothideomycetes, Pezizomycotina, Ascomycota, Fungi
Colonies epiphyllous or hypophyllous on the leaves. Sexual morph: Ascomata superficial, sparsely confluent, circular to elliptical, disc-like, flattened, carbonaceous to membranous, blackened, up to 1 mm diam., halved shields, attached from the center, free margin, with 1–5 locules, opening by longi- tudinal to irregular fissures. Hamathecium lacking pseudo-paraphyses or with hyaline, paraphysoides. Asci bitunicate, biseriate, 8-spored, hyaline, cylindrical clavate, apedicellate, sessile, coarse and thick-walled. Ascospores ovoid-oblong or ellipsoid, initially hyaline becoming brown when mature, 2-celled. Asexual morph: Undetermined (Höhnel 1909).
Notes: Höhnel (1909) introduced Polycyclus and later Theissen and Sydow (1915) designated the type species as Polycyclus andinus. Polycyclus is characterized by superficial, circular to elliptical, disc-like, blackish, flattened ascomata with the fissured centre raised up to the wart shape, and with 1–5 locules disposed of as a ring around a central column, opening by longitudinal to irregular fissures (Inacio and Cannon 2008). Inacio and Cannon (2008) compared P. andinus and P. marginalis, and considered that they were possibly conspecific and they were reported as pathogenic on living leaves of ferns (morphology see Inacio and Cannon 2008; Wijayawardene et al. 2018, 2020).
Type species: Polycyclus andinus (Pat.) Theiss. & Syd., Annls mycol. 13(3/4): 210 (1915)
≡ Hysterostomella andina Pat., Bull. Herb. Boissier 3(1):73 (1895)
Other accepted species: species Fungorum – search Polycyclus.
Figure 1 – Polycyclus andinus. a Leaf specimen. b Vertical section of Ascomata. c Ascospores. Scale bar: c = 10 µm. Redrawn from Batista and Vital (1960)
References
Inácio CA, Cannon PF 2008 – The genera of the Parmulariaceae. CBS biodiversity series, vol 8. CBS Fungal Biodiversity Centre, Utrecht.
Theissen F, Sydow H 1915 – Die Dothideales. Kritisch-Systematische Riginaluntersuchungen. Ann Mycologici 13:147–746.
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