Fungalpedia – Note 2157, Arthopyrenia
Arthopyrenia. A. Massal.
Citation when using this data: Hongsanan S et al. 2020 – Fungalpedia, Ascomycota.
Index Fungorum, Facesoffungi, MycoBank, GenBank, Fig 1
Classification: Trypetheliaceae, Trypetheliales, Incertae sedis, Dothideomycetes, Pezizomycotina, Ascomycota, Fungi
Notes – Arthopyrenia occur as lichenized, lichenicolous or non-lichenized fungi (Coppins 1988). Both asexual morph and sexual morph have been reported in Wijayawardene et al. (2017a). Taxa in this genus are characterized by dimidiate perithecoid which are scattered to irregularly confluent ascomata, with an upper thick clypeate wall composed of periderm cell intermixed with dark hypae. The fertile locule below the involucrellum is surrounded by thin, sometimes scarcely detectable, hyaline or brown excipulum composed of compacted hypae. The asci are shaped from obpyriform, obclavate to subcylindric, usually 8 spored. The ascospores are oblong, ovoid, slipper-shaped, 1–3 septate, hyaline and smooth with a distinct epispore, and branched anastomosed paraphyses, with a trentepohlia photobiont (Coppins 1988, Upreti & Pant 1993).
Type species: Arthopyrenia cerasi (Schrad.) A. Massal.
Other accepted species: Species Fungorum – search Arthopyrenia.
Figure 1 – Arthopyrenia cerasi (redrawn from Hyde et al. 2013). a Section through perithecium. b Individual asci with ascospores. Scale bars: b = 10 μm.
References
Upreti DK, Pant G. 1993 – Notes on Arthopyrenia species from India. Bryologist 96, 226–232.
Entry by
Sinang Hongsanan, Guangdong Provincial Key Laboratory for Plant Epigenetics, Shenzhen Key Laboratory of Microbial Genetic Engineering, College of Life Science and Oceanography, Shenzhen University, Shenzhen 518060, People’s Republic of China, Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand, Department of Entomology and Plant Pathology, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50002, Thailand
Published online 8 April 2026