Fungalpedia – Note 2632, Trematosphaeriopsis

 

Trematosphaeriopsis Elenkin.

Citation when using this data: Meng QF et al. – Fungalpedia.

Index Fungorum, Faceoffungi, MycoBank, GenBank, Fig 1.

Classification: Dothideomycetes genera incertae sedis, Pezizomycotina, Ascomycota, Fungi.

Trematosphaeriopsis was established by Elenkin (1901) to accommodate Trematosphaeriopsis parmeliana Jacz. & Elenkin, which grows on the thallus of Parmelia. Vouaux (1912b) considered the presence of a stroma of the nature described by Elenkin to naturally place this species in Homostegia, therefore, he combined this species as H. parmeliana (Jacz. & Elenkin) Vouaux. However, Hafellner (2001) reinvestigated this monotypic genus, accepted it as a separate genus, and provided a detailed description and line drawing of the type species. Diederich et al. (2018a) accepted this viewpoint and included this genus and its type species in the lichenicolous list. Zhurbenko (2021b) published a new report for the Asian part of Russia from Mongolian border region and provided a color illustration to this species.

Trematosphaeriopsis is characterized by hemisphaerical to somewhat flattened gall-like ascomata that are entirely immersed and protruding only at the ostiole, cylindrical asci that are fissitunicate, 8-spored, and hyaline ascospores narrowly ellipsoid, with three septa (Hafellner 2001).

Type species: Trematosphaeriopsis parmeliana Jacz. & Elenkin, on Xanthoparmelia (Elenkin 1901)

Other accepted species: Species Fungorum – search Trematosphaeriopsis

Figure 1 – Lichenodiplis lecanorae redrawn from Hawksworth et al. (1979). a Section of conidima. b Conidiogenous cells with diveloping conidia. c Conidia. Scale bars: a = 25 μm, b, c = 5 μm.

 

References

Diederich P, Lawrey JD, Ertz D. 2018a – The 2018 classification and checklist of lichenicolous fungi, with 2000 non-lichenized, obligately lichenicolous taxa. The Bryologist 121 (3), 340–425.

Hafellner J. 2001 – Studies in lichenicolous fungi and lichens. XII: On the genus Trematosphaeriopsis (Dothideales). Mycotaxon 80, 381–387.

Vouaux L. 1912b – Synopsis des champignons parasites de lichens. Bulletin de la Société Mycologique de France 28, 177–256.

Zhurbenko MP. 2021b – Lichenicolous fungi from the Holarctic. Part IV: New reports and a key to species on Dermatocarpon. Opuscula Philolichenum 20, 44–53.

 

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 23 June 2026

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