Fungalpedia – Note 528, Corticorygma
Corticorygma M. Cáceres, S.C. Feuerst., Aptroot & Lücking
Citation when using this data: Tibpromma et al. 2024 (in prep.) – Fungalpedia, Lichenicolous fungi.
Index Fungorum, Facesoffungi, MycoBank, GenBank, Fig. 1
Classification: Graphidaceae, Ostropales, Ostropomycetidae, Lecanoromycetes, Pezizomycotina, Ascomycota, Fungi.
Based on morphological characteristics, Cáceres et al. (2014) introduced Corticorygma as a monotypic genus within Graphidaceae, Ostropales in Lecanoromycetes with the type species Corticorygma stellatum. The results of the phylogenetic analyses (mtSSU and LSU) were published separately by Lumbsch et al. (2014). Corticorygma is characterized by thallus corticolous on the tree trunk, surface smooth, continuous, light grey, and prothallus absent. Thallus in section, wepiperidermal, with prosoplectenchymatous cortex, photobiont layer, and medulla, strongly encrusted with numerous small, gray crystals that do not dissolve in K. Photobiont trentepohlia; cells rounded to irregular in outline, in irregular groups, green. Ascomata lirellate, in distinct, well-delimited, stellate clusters, erumpent, with distinct labia; disc narrow, light brown, thickly white-pruinose; proper margin thin, dark brown, white-pruinose; thalline margin thick, whitepruinose. The excipulum is dark brown, prosoplectenchymatous; thalline margin, anatomically similar to thallus; hypothecium prosoplectenchymatous, hyaline; hymenium, hyaline, clear; epithecium granular, dark gray–brown. Paraphyses are unbranched, smooth; periphysoids not observed; asci cylindrical to narrowly clavate. 1-spored asci, ascospores, ellipsoid to oblong, richly muriform, hyaline, sub-distoseptate with angular lumina, I– (Cáceres et al. 2014). To date, no further monotypic species have been introduced to this genus.
Type species: Corticorygma stellatum M. Cáceres, Feuerst., Aptroot & Lücking
Other accepted species: This genus is monotypic.
Figure 1 – Thallus with ascomata of Corticorygma stellatum. Scale bars =1 mm. Redrawn from Cáceres et al. (2014).
References
Entry by
Lu W, Excellence Center of Microbial Diversity and Sustainable Utilization, Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand; Center for Yunnan Plateau Biological Resources Protection and Utilization, College of Biological Resource and Food Engineering, Qujing Normal University, Qujing, Yunnan 655011, China
(Edited by Saowaluck Tibpromma, Samaneh Chaharmiri-Dokhaharani, & Achala R. Rathnayaka)
Published online 9 December 2024