Fungalpedia – Note 2583, Paradoxomyces
Paradoxomyces Matzer.
Citation when using this data: Meng QF et al. – Fungalpedia.
Index Fungorum, Facesoffungi, MycoBank, GenBank, Fig 1
Classification: Arthoniales genera incertae sedis, Arthoniomycetes, Pezizomycotina, Ascomycota, Fungi
Paradoxomyces was introduced by Matzer (1996) to describe the only species Paradoxomyces nymanii, which grows on Strigula nitidula. This genus is characterized by lirellate, black ascomata with a unique, well-developed, carbonaceous lateral exciple. Asci are fissitunicate, subglobose, shortly stipitate, and contain eight hyaline, obovoid, smooth, muriform ascospores with rounded ends. Kirk et al. (2008) placed it within Arthoniaceae, while Diederich et al. (2018a) classified Paradoxomyces within Arthoniales genera incertae sedis (Kirk et al. 2008, Diederich et al. 2018a). As no available sequences, Paradoxomyces was tentatively placed in Arthoniales genera incertae sedis by Hyde et al. (2024).
Type species: Paradoxomyces nymanii Matzer, on Strigula nitidula (Matzer 1996)
Other accepted species: Species Fungorum – search Paradoxomyces
Figure 1 – Perigrapha superveniens redrawn from Matzer (1996). a Asci. b Ascospores. Scale bars: a, b = 10 μm.
References
Kirk PM, Cannon PF, Minter DW, Stalpers JA 2008 – Dictionary of the Fungi. CABI Europe – UK, 1–771.
Entry by
Meng QF, Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai, 57100, Thailand and School of Public Health, Zunyi Medical University, Guizhou 563000, China
Published online 9 June 2026