Fungalpedia – Note 542, Aggregatorygma
Aggregatorygma M. Cáceres, 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.
Caceres et al. (2014) proposed Aggregatorygma (Graphidaceae, Ostropales, and Lecanoromycetes) based on molecular, morphological, and anatomical characteristics, with the type species Aggregatorygma triseptatum. Members of the genus Aggregatorygma have the following morphological characteristics: thallus are epiperidermal, corticolous, continuous, minutely farinose surface, light greyish green, and prothallus white (Caceres et al. 2014). The thallus in the section has a thick photobiont layer and a thick medulla and is covered with tiny, gray crystals that are encrusted and do not dissolve in K. Photobiont trentepohlia are green, spherical to irregularly shaped cells in irregular groupings. Ascomata lirellate has thin, barely noticeable labia. The disc is narrow, pale brown, thinly white-pruinose; proper margin thin, white-pruinose, typically divided from the thalline margin by narrow split; thalline margin thin, pale greyish green, thalline edge thick, and similar to thallus (Caceres et al. 2014). Excipulum are hyaline to light yellowish, prosoplectenchymatous, hymenium hyaline, transparent, epithecium vague, hyaline. 8-spored asci cylindrical to narrowly clavate, ascospore uniseriate, ellipsoid, 3-sepate, hyaline, distoseptate with lens-shaped lumina (Caceres et al. 2014).
Type species: Aggregatorygma triseptatum M. Cáceres, Aptroot & Lücking
Other accepted species: Species Fungorum – search Aggregatorygma
Figure 1– Aggregatorygma triseptatum, thallus and ascomata. Redrawn from Caceres et al. (2014).
Reference
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